author | sherman |
Wed, 29 Nov 2017 15:01:16 -0800 | |
changeset 47987 | 85ea7e83af30 |
parent 47216 | 71c04702a3d5 |
child 48203 | 4fd79561f38f |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2014, 2017, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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||
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package jdk.internal.module; |
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||
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import java.io.DataInput; |
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import java.io.DataInputStream; |
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import java.io.EOFException; |
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import java.io.IOException; |
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import java.io.InputStream; |
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import java.io.UncheckedIOException; |
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import java.lang.module.InvalidModuleDescriptorException; |
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import java.lang.module.ModuleDescriptor; |
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import java.lang.module.ModuleDescriptor.Builder; |
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import java.lang.module.ModuleDescriptor.Requires; |
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import java.lang.module.ModuleDescriptor.Exports; |
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import java.lang.module.ModuleDescriptor.Opens; |
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import java.nio.ByteBuffer; |
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import java.nio.BufferUnderflowException; |
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import java.util.ArrayList; |
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import java.util.Collections; |
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import java.util.HashMap; |
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import java.util.HashSet; |
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import java.util.List; |
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import java.util.Map; |
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import java.util.Set; |
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import java.util.function.Supplier; |
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import jdk.internal.misc.JavaLangModuleAccess; |
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import jdk.internal.misc.SharedSecrets; |
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import static jdk.internal.module.ClassFileConstants.*; |
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/** |
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* Read module information from a {@code module-info} class file. |
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* |
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* @implNote The rationale for the hand-coded reader is startup performance |
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* and fine control over the throwing of InvalidModuleDescriptorException. |
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*/ |
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public final class ModuleInfo { |
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private static final JavaLangModuleAccess JLMA |
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= SharedSecrets.getJavaLangModuleAccess(); |
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// supplies the set of packages when ModulePackages attribute not present |
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private final Supplier<Set<String>> packageFinder; |
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// indicates if the ModuleHashes attribute should be parsed |
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private final boolean parseHashes; |
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private ModuleInfo(Supplier<Set<String>> pf, boolean ph) { |
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packageFinder = pf; |
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parseHashes = ph; |
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} |
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private ModuleInfo(Supplier<Set<String>> pf) { |
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this(pf, true); |
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} |
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/** |
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* A holder class for the ModuleDescriptor that is created by reading the |
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* Module and other standard class file attributes. It also holds the objects |
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* that represent the non-standard class file attributes that are read from |
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* the class file. |
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*/ |
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public static final class Attributes { |
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private final ModuleDescriptor descriptor; |
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private final ModuleTarget target; |
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private final ModuleHashes recordedHashes; |
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private final ModuleResolution moduleResolution; |
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Attributes(ModuleDescriptor descriptor, |
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ModuleTarget target, |
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ModuleHashes recordedHashes, |
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ModuleResolution moduleResolution) { |
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this.descriptor = descriptor; |
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this.target = target; |
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this.recordedHashes = recordedHashes; |
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this.moduleResolution = moduleResolution; |
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} |
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public ModuleDescriptor descriptor() { |
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return descriptor; |
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} |
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public ModuleTarget target() { |
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return target; |
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} |
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public ModuleHashes recordedHashes() { |
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return recordedHashes; |
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} |
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public ModuleResolution moduleResolution() { |
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return moduleResolution; |
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} |
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} |
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/** |
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* Reads a {@code module-info.class} from the given input stream. |
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* |
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* @throws InvalidModuleDescriptorException |
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* @throws IOException |
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*/ |
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public static Attributes read(InputStream in, Supplier<Set<String>> pf) |
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throws IOException |
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{ |
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try { |
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return new ModuleInfo(pf).doRead(new DataInputStream(in)); |
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} catch (IllegalArgumentException | IllegalStateException e) { |
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throw invalidModuleDescriptor(e.getMessage()); |
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} catch (EOFException x) { |
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throw truncatedModuleDescriptor(); |
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} |
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} |
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/** |
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* Reads a {@code module-info.class} from the given byte buffer. |
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* |
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* @throws InvalidModuleDescriptorException |
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* @throws UncheckedIOException |
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*/ |
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public static Attributes read(ByteBuffer bb, Supplier<Set<String>> pf) { |
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try { |
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return new ModuleInfo(pf).doRead(new DataInputWrapper(bb)); |
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} catch (IllegalArgumentException | IllegalStateException e) { |
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throw invalidModuleDescriptor(e.getMessage()); |
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} catch (EOFException x) { |
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throw truncatedModuleDescriptor(); |
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} catch (IOException ioe) { |
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throw new UncheckedIOException(ioe); |
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} |
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} |
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/** |
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* Reads a {@code module-info.class} from the given byte buffer |
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* but ignore the {@code ModuleHashes} attribute. |
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* |
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* @throws InvalidModuleDescriptorException |
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* @throws UncheckedIOException |
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*/ |
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public static Attributes readIgnoringHashes(ByteBuffer bb, Supplier<Set<String>> pf) { |
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try { |
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return new ModuleInfo(pf, false).doRead(new DataInputWrapper(bb)); |
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} catch (IllegalArgumentException | IllegalStateException e) { |
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throw invalidModuleDescriptor(e.getMessage()); |
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} catch (EOFException x) { |
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throw truncatedModuleDescriptor(); |
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} catch (IOException ioe) { |
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throw new UncheckedIOException(ioe); |
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} |
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} |
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/** |
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* Reads the input as a module-info class file. |
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* |
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* @throws IOException |
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* @throws InvalidModuleDescriptorException |
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* @throws IllegalArgumentException if thrown by the ModuleDescriptor.Builder |
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* because an identifier is not a legal Java identifier, duplicate |
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* exports, and many other reasons |
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*/ |
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private Attributes doRead(DataInput in) throws IOException { |
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int magic = in.readInt(); |
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if (magic != 0xCAFEBABE) |
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throw invalidModuleDescriptor("Bad magic number"); |
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int minor_version = in.readUnsignedShort(); |
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int major_version = in.readUnsignedShort(); |
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if (major_version < 53) { |
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throw invalidModuleDescriptor("Must be >= 53.0"); |
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} |
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ConstantPool cpool = new ConstantPool(in); |
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int access_flags = in.readUnsignedShort(); |
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if (access_flags != ACC_MODULE) |
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throw invalidModuleDescriptor("access_flags should be ACC_MODULE"); |
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int this_class = in.readUnsignedShort(); |
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String mn = cpool.getClassName(this_class); |
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if (!"module-info".equals(mn)) |
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throw invalidModuleDescriptor("this_class should be module-info"); |
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int super_class = in.readUnsignedShort(); |
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if (super_class > 0) |
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throw invalidModuleDescriptor("bad #super_class"); |
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int interfaces_count = in.readUnsignedShort(); |
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if (interfaces_count > 0) |
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throw invalidModuleDescriptor("Bad #interfaces"); |
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int fields_count = in.readUnsignedShort(); |
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if (fields_count > 0) |
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throw invalidModuleDescriptor("Bad #fields"); |
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int methods_count = in.readUnsignedShort(); |
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if (methods_count > 0) |
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throw invalidModuleDescriptor("Bad #methods"); |
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int attributes_count = in.readUnsignedShort(); |
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// the names of the attributes found in the class file |
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Set<String> attributes = new HashSet<>(); |
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Builder builder = null; |
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Set<String> allPackages = null; |
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String mainClass = null; |
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ModuleTarget moduleTarget = null; |
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ModuleHashes moduelHashes = null; |
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ModuleResolution moduleResolution = null; |
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for (int i = 0; i < attributes_count ; i++) { |
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int name_index = in.readUnsignedShort(); |
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String attribute_name = cpool.getUtf8(name_index); |
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int length = in.readInt(); |
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boolean added = attributes.add(attribute_name); |
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if (!added && isAttributeAtMostOnce(attribute_name)) { |
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throw invalidModuleDescriptor("More than one " |
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+ attribute_name + " attribute"); |
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} |
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switch (attribute_name) { |
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case MODULE : |
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builder = readModuleAttribute(in, cpool); |
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break; |
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case MODULE_PACKAGES : |
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allPackages = readModulePackagesAttribute(in, cpool); |
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break; |
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case MODULE_MAIN_CLASS : |
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mainClass = readModuleMainClassAttribute(in, cpool); |
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break; |
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case MODULE_TARGET : |
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moduleTarget = readModuleTargetAttribute(in, cpool); |
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break; |
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case MODULE_HASHES : |
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if (parseHashes) { |
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moduelHashes = readModuleHashesAttribute(in, cpool); |
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} else { |
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in.skipBytes(length); |
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} |
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break; |
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case MODULE_RESOLUTION : |
|
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moduleResolution = readModuleResolution(in, cpool); |
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break; |
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||
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default: |
|
276 |
if (isAttributeDisallowed(attribute_name)) { |
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throw invalidModuleDescriptor(attribute_name |
|
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+ " attribute not allowed"); |
|
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} else { |
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in.skipBytes(length); |
|
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} |
|
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||
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} |
|
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} |
|
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||
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// the Module attribute is required |
|
287 |
if (builder == null) { |
|
288 |
throw invalidModuleDescriptor(MODULE + " attribute not found"); |
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} |
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// ModuleMainClass attribute |
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if (mainClass != null) { |
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builder.mainClass(mainClass); |
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} |
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|
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// If the ModulePackages attribute is not present then the packageFinder |
297 |
// is used to find the set of packages |
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boolean usedPackageFinder = false; |
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if (allPackages == null && packageFinder != null) { |
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try { |
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allPackages = packageFinder.get(); |
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} catch (UncheckedIOException x) { |
303 |
throw x.getCause(); |
|
304 |
} |
|
305 |
usedPackageFinder = true; |
|
306 |
} |
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if (allPackages != null) { |
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Set<String> knownPackages = JLMA.packages(builder); |
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if (!allPackages.containsAll(knownPackages)) { |
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Set<String> missingPackages = new HashSet<>(knownPackages); |
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missingPackages.removeAll(allPackages); |
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assert !missingPackages.isEmpty(); |
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String missingPackage = missingPackages.iterator().next(); |
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String tail; |
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if (usedPackageFinder) { |
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316 |
tail = " not found in module"; |
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317 |
} else { |
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tail = " missing from ModulePackages class file attribute"; |
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} |
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throw invalidModuleDescriptor("Package " + missingPackage + tail); |
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} |
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323 |
builder.packages(allPackages); |
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} |
325 |
||
326 |
ModuleDescriptor descriptor = builder.build(); |
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return new Attributes(descriptor, |
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moduleTarget, |
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moduelHashes, |
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330 |
moduleResolution); |
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} |
332 |
||
333 |
/** |
|
334 |
* Reads the Module attribute, returning the ModuleDescriptor.Builder to |
|
335 |
* build the corresponding ModuleDescriptor. |
|
336 |
*/ |
|
337 |
private Builder readModuleAttribute(DataInput in, ConstantPool cpool) |
|
338 |
throws IOException |
|
339 |
{ |
|
340 |
// module_name |
|
341 |
int module_name_index = in.readUnsignedShort(); |
|
342 |
String mn = cpool.getModuleName(module_name_index); |
|
343 |
||
344 |
int module_flags = in.readUnsignedShort(); |
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Set<ModuleDescriptor.Modifier> modifiers = new HashSet<>(); |
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boolean open = ((module_flags & ACC_OPEN) != 0); |
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if (open) |
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modifiers.add(ModuleDescriptor.Modifier.OPEN); |
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if ((module_flags & ACC_SYNTHETIC) != 0) |
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modifiers.add(ModuleDescriptor.Modifier.SYNTHETIC); |
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if ((module_flags & ACC_MANDATED) != 0) |
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modifiers.add(ModuleDescriptor.Modifier.MANDATED); |
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355 |
Builder builder = JLMA.newModuleBuilder(mn, false, modifiers); |
42703 | 356 |
|
357 |
int module_version_index = in.readUnsignedShort(); |
|
358 |
if (module_version_index != 0) { |
|
359 |
String vs = cpool.getUtf8(module_version_index); |
|
360 |
builder.version(vs); |
|
361 |
} |
|
362 |
||
363 |
int requires_count = in.readUnsignedShort(); |
|
364 |
boolean requiresJavaBase = false; |
|
365 |
for (int i=0; i<requires_count; i++) { |
|
366 |
int requires_index = in.readUnsignedShort(); |
|
367 |
String dn = cpool.getModuleName(requires_index); |
|
368 |
||
369 |
int requires_flags = in.readUnsignedShort(); |
|
370 |
Set<Requires.Modifier> mods; |
|
371 |
if (requires_flags == 0) { |
|
372 |
mods = Collections.emptySet(); |
|
373 |
} else { |
|
374 |
mods = new HashSet<>(); |
|
375 |
if ((requires_flags & ACC_TRANSITIVE) != 0) |
|
376 |
mods.add(Requires.Modifier.TRANSITIVE); |
|
377 |
if ((requires_flags & ACC_STATIC_PHASE) != 0) |
|
378 |
mods.add(Requires.Modifier.STATIC); |
|
379 |
if ((requires_flags & ACC_SYNTHETIC) != 0) |
|
380 |
mods.add(Requires.Modifier.SYNTHETIC); |
|
381 |
if ((requires_flags & ACC_MANDATED) != 0) |
|
382 |
mods.add(Requires.Modifier.MANDATED); |
|
383 |
} |
|
384 |
||
385 |
int requires_version_index = in.readUnsignedShort(); |
|
43712
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diff
changeset
|
386 |
if (requires_version_index == 0) { |
42703 | 387 |
builder.requires(mods, dn); |
388 |
} else { |
|
43712
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diff
changeset
|
389 |
String vs = cpool.getUtf8(requires_version_index); |
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diff
changeset
|
390 |
JLMA.requires(builder, mods, dn, vs); |
42703 | 391 |
} |
392 |
||
393 |
if (dn.equals("java.base")) |
|
394 |
requiresJavaBase = true; |
|
395 |
} |
|
396 |
if (mn.equals("java.base")) { |
|
397 |
if (requires_count > 0) { |
|
398 |
throw invalidModuleDescriptor("The requires table for java.base" |
|
399 |
+ " must be 0 length"); |
|
400 |
} |
|
401 |
} else if (!requiresJavaBase) { |
|
402 |
throw invalidModuleDescriptor("The requires table must have" |
|
403 |
+ " an entry for java.base"); |
|
404 |
} |
|
405 |
||
406 |
int exports_count = in.readUnsignedShort(); |
|
407 |
if (exports_count > 0) { |
|
408 |
for (int i=0; i<exports_count; i++) { |
|
409 |
int exports_index = in.readUnsignedShort(); |
|
410 |
String pkg = cpool.getPackageName(exports_index); |
|
411 |
||
412 |
Set<Exports.Modifier> mods; |
|
413 |
int exports_flags = in.readUnsignedShort(); |
|
414 |
if (exports_flags == 0) { |
|
415 |
mods = Collections.emptySet(); |
|
416 |
} else { |
|
417 |
mods = new HashSet<>(); |
|
418 |
if ((exports_flags & ACC_SYNTHETIC) != 0) |
|
419 |
mods.add(Exports.Modifier.SYNTHETIC); |
|
420 |
if ((exports_flags & ACC_MANDATED) != 0) |
|
421 |
mods.add(Exports.Modifier.MANDATED); |
|
422 |
} |
|
423 |
||
424 |
int exports_to_count = in.readUnsignedShort(); |
|
425 |
if (exports_to_count > 0) { |
|
426 |
Set<String> targets = new HashSet<>(exports_to_count); |
|
427 |
for (int j=0; j<exports_to_count; j++) { |
|
428 |
int exports_to_index = in.readUnsignedShort(); |
|
44359
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changeset
|
429 |
String target = cpool.getModuleName(exports_to_index); |
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|
430 |
if (!targets.add(target)) { |
c6761862ca0b
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diff
changeset
|
431 |
throw invalidModuleDescriptor(pkg + " exported to " |
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diff
changeset
|
432 |
+ target + " more than once"); |
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changeset
|
433 |
} |
42703 | 434 |
} |
435 |
builder.exports(mods, pkg, targets); |
|
436 |
} else { |
|
437 |
builder.exports(mods, pkg); |
|
438 |
} |
|
439 |
} |
|
440 |
} |
|
441 |
||
442 |
int opens_count = in.readUnsignedShort(); |
|
443 |
if (opens_count > 0) { |
|
444 |
if (open) { |
|
445 |
throw invalidModuleDescriptor("The opens table for an open" |
|
446 |
+ " module must be 0 length"); |
|
447 |
} |
|
448 |
for (int i=0; i<opens_count; i++) { |
|
449 |
int opens_index = in.readUnsignedShort(); |
|
450 |
String pkg = cpool.getPackageName(opens_index); |
|
451 |
||
452 |
Set<Opens.Modifier> mods; |
|
453 |
int opens_flags = in.readUnsignedShort(); |
|
454 |
if (opens_flags == 0) { |
|
455 |
mods = Collections.emptySet(); |
|
456 |
} else { |
|
457 |
mods = new HashSet<>(); |
|
458 |
if ((opens_flags & ACC_SYNTHETIC) != 0) |
|
459 |
mods.add(Opens.Modifier.SYNTHETIC); |
|
460 |
if ((opens_flags & ACC_MANDATED) != 0) |
|
461 |
mods.add(Opens.Modifier.MANDATED); |
|
462 |
} |
|
463 |
||
464 |
int open_to_count = in.readUnsignedShort(); |
|
465 |
if (open_to_count > 0) { |
|
466 |
Set<String> targets = new HashSet<>(open_to_count); |
|
467 |
for (int j=0; j<open_to_count; j++) { |
|
468 |
int opens_to_index = in.readUnsignedShort(); |
|
44359
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parents:
43712
diff
changeset
|
469 |
String target = cpool.getModuleName(opens_to_index); |
c6761862ca0b
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changeset
|
470 |
if (!targets.add(target)) { |
c6761862ca0b
8174823: Module system implementation refresh (3/2017)
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parents:
43712
diff
changeset
|
471 |
throw invalidModuleDescriptor(pkg + " opened to " |
c6761862ca0b
8174823: Module system implementation refresh (3/2017)
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parents:
43712
diff
changeset
|
472 |
+ target + " more than once"); |
c6761862ca0b
8174823: Module system implementation refresh (3/2017)
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parents:
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diff
changeset
|
473 |
} |
42703 | 474 |
} |
475 |
builder.opens(mods, pkg, targets); |
|
476 |
} else { |
|
477 |
builder.opens(mods, pkg); |
|
478 |
} |
|
479 |
} |
|
480 |
} |
|
481 |
||
482 |
int uses_count = in.readUnsignedShort(); |
|
483 |
if (uses_count > 0) { |
|
484 |
for (int i=0; i<uses_count; i++) { |
|
485 |
int index = in.readUnsignedShort(); |
|
486 |
String sn = cpool.getClassName(index); |
|
487 |
builder.uses(sn); |
|
488 |
} |
|
489 |
} |
|
490 |
||
491 |
int provides_count = in.readUnsignedShort(); |
|
492 |
if (provides_count > 0) { |
|
493 |
for (int i=0; i<provides_count; i++) { |
|
494 |
int index = in.readUnsignedShort(); |
|
495 |
String sn = cpool.getClassName(index); |
|
496 |
int with_count = in.readUnsignedShort(); |
|
497 |
List<String> providers = new ArrayList<>(with_count); |
|
498 |
for (int j=0; j<with_count; j++) { |
|
499 |
index = in.readUnsignedShort(); |
|
500 |
String pn = cpool.getClassName(index); |
|
44359
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parents:
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diff
changeset
|
501 |
if (!providers.add(pn)) { |
c6761862ca0b
8174823: Module system implementation refresh (3/2017)
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parents:
43712
diff
changeset
|
502 |
throw invalidModuleDescriptor(sn + " provides " + pn |
c6761862ca0b
8174823: Module system implementation refresh (3/2017)
alanb
parents:
43712
diff
changeset
|
503 |
+ " more than once"); |
c6761862ca0b
8174823: Module system implementation refresh (3/2017)
alanb
parents:
43712
diff
changeset
|
504 |
} |
42703 | 505 |
} |
506 |
builder.provides(sn, providers); |
|
507 |
} |
|
508 |
} |
|
509 |
||
510 |
return builder; |
|
511 |
} |
|
512 |
||
513 |
/** |
|
514 |
* Reads the ModulePackages attribute |
|
515 |
*/ |
|
516 |
private Set<String> readModulePackagesAttribute(DataInput in, ConstantPool cpool) |
|
517 |
throws IOException |
|
518 |
{ |
|
519 |
int package_count = in.readUnsignedShort(); |
|
520 |
Set<String> packages = new HashSet<>(package_count); |
|
521 |
for (int i=0; i<package_count; i++) { |
|
522 |
int index = in.readUnsignedShort(); |
|
523 |
String pn = cpool.getPackageName(index); |
|
524 |
boolean added = packages.add(pn); |
|
525 |
if (!added) { |
|
526 |
throw invalidModuleDescriptor("Package " + pn + " in ModulePackages" |
|
527 |
+ "attribute more than once"); |
|
528 |
} |
|
529 |
} |
|
530 |
return packages; |
|
531 |
} |
|
532 |
||
533 |
/** |
|
534 |
* Reads the ModuleMainClass attribute |
|
535 |
*/ |
|
536 |
private String readModuleMainClassAttribute(DataInput in, ConstantPool cpool) |
|
537 |
throws IOException |
|
538 |
{ |
|
539 |
int index = in.readUnsignedShort(); |
|
540 |
return cpool.getClassName(index); |
|
541 |
} |
|
542 |
||
543 |
/** |
|
544 |
* Reads the ModuleTarget attribute |
|
545 |
*/ |
|
44359
c6761862ca0b
8174823: Module system implementation refresh (3/2017)
alanb
parents:
43712
diff
changeset
|
546 |
private ModuleTarget readModuleTargetAttribute(DataInput in, ConstantPool cpool) |
42703 | 547 |
throws IOException |
548 |
{ |
|
45004
ea3137042a61
8178380: Module system implementation refresh (5/2017)
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parents:
44359
diff
changeset
|
549 |
String targetPlatform = null; |
42703 | 550 |
|
45004
ea3137042a61
8178380: Module system implementation refresh (5/2017)
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parents:
44359
diff
changeset
|
551 |
int index = in.readUnsignedShort(); |
ea3137042a61
8178380: Module system implementation refresh (5/2017)
alanb
parents:
44359
diff
changeset
|
552 |
if (index != 0) |
ea3137042a61
8178380: Module system implementation refresh (5/2017)
alanb
parents:
44359
diff
changeset
|
553 |
targetPlatform = cpool.getUtf8(index); |
42703 | 554 |
|
45004
ea3137042a61
8178380: Module system implementation refresh (5/2017)
alanb
parents:
44359
diff
changeset
|
555 |
return new ModuleTarget(targetPlatform); |
42703 | 556 |
} |
557 |
||
558 |
/** |
|
559 |
* Reads the ModuleHashes attribute |
|
560 |
*/ |
|
561 |
private ModuleHashes readModuleHashesAttribute(DataInput in, ConstantPool cpool) |
|
562 |
throws IOException |
|
563 |
{ |
|
564 |
int algorithm_index = in.readUnsignedShort(); |
|
565 |
String algorithm = cpool.getUtf8(algorithm_index); |
|
566 |
||
567 |
int hash_count = in.readUnsignedShort(); |
|
568 |
Map<String, byte[]> map = new HashMap<>(hash_count); |
|
569 |
for (int i=0; i<hash_count; i++) { |
|
570 |
int module_name_index = in.readUnsignedShort(); |
|
571 |
String mn = cpool.getModuleName(module_name_index); |
|
572 |
int hash_length = in.readUnsignedShort(); |
|
573 |
if (hash_length == 0) { |
|
574 |
throw invalidModuleDescriptor("hash_length == 0"); |
|
575 |
} |
|
576 |
byte[] hash = new byte[hash_length]; |
|
577 |
in.readFully(hash); |
|
578 |
map.put(mn, hash); |
|
579 |
} |
|
580 |
||
581 |
return new ModuleHashes(algorithm, map); |
|
582 |
} |
|
583 |
||
584 |
/** |
|
585 |
* Reads the ModuleResolution attribute. |
|
586 |
*/ |
|
587 |
private ModuleResolution readModuleResolution(DataInput in, |
|
588 |
ConstantPool cpool) |
|
589 |
throws IOException |
|
590 |
{ |
|
591 |
int flags = in.readUnsignedShort(); |
|
592 |
||
593 |
int reason = 0; |
|
594 |
if ((flags & WARN_DEPRECATED) != 0) |
|
595 |
reason = WARN_DEPRECATED; |
|
596 |
if ((flags & WARN_DEPRECATED_FOR_REMOVAL) != 0) { |
|
597 |
if (reason != 0) |
|
598 |
throw invalidModuleDescriptor("Bad module resolution flags:" + flags); |
|
599 |
reason = WARN_DEPRECATED_FOR_REMOVAL; |
|
600 |
} |
|
601 |
if ((flags & WARN_INCUBATING) != 0) { |
|
602 |
if (reason != 0) |
|
603 |
throw invalidModuleDescriptor("Bad module resolution flags:" + flags); |
|
604 |
} |
|
605 |
||
606 |
return new ModuleResolution(flags); |
|
607 |
} |
|
608 |
||
609 |
/** |
|
610 |
* Returns true if the given attribute can be present at most once |
|
611 |
* in the class file. Returns false otherwise. |
|
612 |
*/ |
|
613 |
private static boolean isAttributeAtMostOnce(String name) { |
|
614 |
||
615 |
if (name.equals(MODULE) || |
|
616 |
name.equals(SOURCE_FILE) || |
|
617 |
name.equals(SDE) || |
|
618 |
name.equals(MODULE_PACKAGES) || |
|
619 |
name.equals(MODULE_MAIN_CLASS) || |
|
620 |
name.equals(MODULE_TARGET) || |
|
621 |
name.equals(MODULE_HASHES) || |
|
622 |
name.equals(MODULE_RESOLUTION)) |
|
623 |
return true; |
|
624 |
||
625 |
return false; |
|
626 |
} |
|
627 |
||
628 |
/** |
|
629 |
* Return true if the given attribute name is the name of a pre-defined |
|
43712
5dfd0950317c
8173393: Module system implementation refresh (2/2017)
alanb
parents:
42703
diff
changeset
|
630 |
* attribute in JVMS 4.7 that is not allowed in a module-info class. |
42703 | 631 |
*/ |
632 |
private static boolean isAttributeDisallowed(String name) { |
|
633 |
Set<String> notAllowed = predefinedNotAllowed; |
|
634 |
if (notAllowed == null) { |
|
635 |
notAllowed = Set.of( |
|
636 |
"ConstantValue", |
|
637 |
"Code", |
|
43712
5dfd0950317c
8173393: Module system implementation refresh (2/2017)
alanb
parents:
42703
diff
changeset
|
638 |
"Deprecated", |
42703 | 639 |
"StackMapTable", |
640 |
"Exceptions", |
|
641 |
"EnclosingMethod", |
|
642 |
"Signature", |
|
643 |
"LineNumberTable", |
|
644 |
"LocalVariableTable", |
|
645 |
"LocalVariableTypeTable", |
|
646 |
"RuntimeVisibleParameterAnnotations", |
|
647 |
"RuntimeInvisibleParameterAnnotations", |
|
648 |
"RuntimeVisibleTypeAnnotations", |
|
649 |
"RuntimeInvisibleTypeAnnotations", |
|
650 |
"Synthetic", |
|
651 |
"AnnotationDefault", |
|
652 |
"BootstrapMethods", |
|
653 |
"MethodParameters"); |
|
654 |
predefinedNotAllowed = notAllowed; |
|
655 |
} |
|
656 |
return notAllowed.contains(name); |
|
657 |
} |
|
658 |
||
659 |
// lazily created set the pre-defined attributes that are not allowed |
|
660 |
private static volatile Set<String> predefinedNotAllowed; |
|
661 |
||
662 |
||
663 |
/** |
|
664 |
* The constant pool in a class file. |
|
665 |
*/ |
|
666 |
private static class ConstantPool { |
|
667 |
static final int CONSTANT_Utf8 = 1; |
|
668 |
static final int CONSTANT_Integer = 3; |
|
669 |
static final int CONSTANT_Float = 4; |
|
670 |
static final int CONSTANT_Long = 5; |
|
671 |
static final int CONSTANT_Double = 6; |
|
672 |
static final int CONSTANT_Class = 7; |
|
673 |
static final int CONSTANT_String = 8; |
|
674 |
static final int CONSTANT_Fieldref = 9; |
|
675 |
static final int CONSTANT_Methodref = 10; |
|
676 |
static final int CONSTANT_InterfaceMethodref = 11; |
|
677 |
static final int CONSTANT_NameAndType = 12; |
|
678 |
static final int CONSTANT_MethodHandle = 15; |
|
679 |
static final int CONSTANT_MethodType = 16; |
|
680 |
static final int CONSTANT_InvokeDynamic = 18; |
|
681 |
static final int CONSTANT_Module = 19; |
|
682 |
static final int CONSTANT_Package = 20; |
|
683 |
||
684 |
private static class Entry { |
|
685 |
protected Entry(int tag) { |
|
686 |
this.tag = tag; |
|
687 |
} |
|
688 |
final int tag; |
|
689 |
} |
|
690 |
||
691 |
private static class IndexEntry extends Entry { |
|
692 |
IndexEntry(int tag, int index) { |
|
693 |
super(tag); |
|
694 |
this.index = index; |
|
695 |
} |
|
696 |
final int index; |
|
697 |
} |
|
698 |
||
699 |
private static class Index2Entry extends Entry { |
|
700 |
Index2Entry(int tag, int index1, int index2) { |
|
701 |
super(tag); |
|
702 |
this.index1 = index1; |
|
703 |
this.index2 = index2; |
|
704 |
} |
|
705 |
final int index1, index2; |
|
706 |
} |
|
707 |
||
708 |
private static class ValueEntry extends Entry { |
|
709 |
ValueEntry(int tag, Object value) { |
|
710 |
super(tag); |
|
711 |
this.value = value; |
|
712 |
} |
|
713 |
final Object value; |
|
714 |
} |
|
715 |
||
716 |
final Entry[] pool; |
|
717 |
||
718 |
ConstantPool(DataInput in) throws IOException { |
|
719 |
int count = in.readUnsignedShort(); |
|
720 |
pool = new Entry[count]; |
|
721 |
||
722 |
for (int i = 1; i < count; i++) { |
|
723 |
int tag = in.readUnsignedByte(); |
|
724 |
switch (tag) { |
|
725 |
||
726 |
case CONSTANT_Utf8: |
|
727 |
String svalue = in.readUTF(); |
|
728 |
pool[i] = new ValueEntry(tag, svalue); |
|
729 |
break; |
|
730 |
||
731 |
case CONSTANT_Class: |
|
732 |
case CONSTANT_Package: |
|
733 |
case CONSTANT_Module: |
|
734 |
case CONSTANT_String: |
|
735 |
int index = in.readUnsignedShort(); |
|
736 |
pool[i] = new IndexEntry(tag, index); |
|
737 |
break; |
|
738 |
||
739 |
case CONSTANT_Double: |
|
740 |
double dvalue = in.readDouble(); |
|
741 |
pool[i] = new ValueEntry(tag, dvalue); |
|
742 |
i++; |
|
743 |
break; |
|
744 |
||
745 |
case CONSTANT_Fieldref: |
|
746 |
case CONSTANT_InterfaceMethodref: |
|
747 |
case CONSTANT_Methodref: |
|
748 |
case CONSTANT_InvokeDynamic: |
|
749 |
case CONSTANT_NameAndType: |
|
750 |
int index1 = in.readUnsignedShort(); |
|
751 |
int index2 = in.readUnsignedShort(); |
|
752 |
pool[i] = new Index2Entry(tag, index1, index2); |
|
753 |
break; |
|
754 |
||
755 |
case CONSTANT_MethodHandle: |
|
756 |
int refKind = in.readUnsignedByte(); |
|
757 |
index = in.readUnsignedShort(); |
|
758 |
pool[i] = new Index2Entry(tag, refKind, index); |
|
759 |
break; |
|
760 |
||
761 |
case CONSTANT_MethodType: |
|
762 |
index = in.readUnsignedShort(); |
|
763 |
pool[i] = new IndexEntry(tag, index); |
|
764 |
break; |
|
765 |
||
766 |
case CONSTANT_Float: |
|
767 |
float fvalue = in.readFloat(); |
|
768 |
pool[i] = new ValueEntry(tag, fvalue); |
|
769 |
break; |
|
770 |
||
771 |
case CONSTANT_Integer: |
|
772 |
int ivalue = in.readInt(); |
|
773 |
pool[i] = new ValueEntry(tag, ivalue); |
|
774 |
break; |
|
775 |
||
776 |
case CONSTANT_Long: |
|
777 |
long lvalue = in.readLong(); |
|
778 |
pool[i] = new ValueEntry(tag, lvalue); |
|
779 |
i++; |
|
780 |
break; |
|
781 |
||
782 |
default: |
|
783 |
throw invalidModuleDescriptor("Bad constant pool entry: " |
|
784 |
+ i); |
|
785 |
} |
|
786 |
} |
|
787 |
} |
|
788 |
||
789 |
String getClassName(int index) { |
|
790 |
checkIndex(index); |
|
791 |
Entry e = pool[index]; |
|
792 |
if (e.tag != CONSTANT_Class) { |
|
793 |
throw invalidModuleDescriptor("CONSTANT_Class expected at entry: " |
|
794 |
+ index); |
|
795 |
} |
|
796 |
String value = getUtf8(((IndexEntry) e).index); |
|
797 |
checkUnqualifiedName("CONSTANT_Class", index, value); |
|
798 |
return value.replace('/', '.'); // internal form -> binary name |
|
799 |
} |
|
800 |
||
801 |
String getPackageName(int index) { |
|
802 |
checkIndex(index); |
|
803 |
Entry e = pool[index]; |
|
804 |
if (e.tag != CONSTANT_Package) { |
|
805 |
throw invalidModuleDescriptor("CONSTANT_Package expected at entry: " |
|
806 |
+ index); |
|
807 |
} |
|
808 |
String value = getUtf8(((IndexEntry) e).index); |
|
809 |
checkUnqualifiedName("CONSTANT_Package", index, value); |
|
810 |
return value.replace('/', '.'); // internal form -> binary name |
|
811 |
} |
|
812 |
||
813 |
String getModuleName(int index) { |
|
814 |
checkIndex(index); |
|
815 |
Entry e = pool[index]; |
|
816 |
if (e.tag != CONSTANT_Module) { |
|
817 |
throw invalidModuleDescriptor("CONSTANT_Module expected at entry: " |
|
818 |
+ index); |
|
819 |
} |
|
820 |
String value = getUtf8(((IndexEntry) e).index); |
|
821 |
return decodeModuleName(index, value); |
|
822 |
} |
|
823 |
||
824 |
String getUtf8(int index) { |
|
825 |
checkIndex(index); |
|
826 |
Entry e = pool[index]; |
|
827 |
if (e.tag != CONSTANT_Utf8) { |
|
828 |
throw invalidModuleDescriptor("CONSTANT_Utf8 expected at entry: " |
|
829 |
+ index); |
|
830 |
} |
|
831 |
return (String) (((ValueEntry) e).value); |
|
832 |
} |
|
833 |
||
834 |
void checkIndex(int index) { |
|
835 |
if (index < 1 || index >= pool.length) |
|
836 |
throw invalidModuleDescriptor("Index into constant pool out of range"); |
|
837 |
} |
|
838 |
||
839 |
void checkUnqualifiedName(String what, int index, String value) { |
|
840 |
int len = value.length(); |
|
841 |
if (len == 0) { |
|
842 |
throw invalidModuleDescriptor(what + " at entry " + index |
|
843 |
+ " has zero length"); |
|
844 |
} |
|
845 |
for (int i=0; i<len; i++) { |
|
846 |
char c = value.charAt(i); |
|
847 |
if (c == '.' || c == ';' || c == '[') { |
|
848 |
throw invalidModuleDescriptor(what + " at entry " + index |
|
849 |
+ " has illegal character: '" |
|
850 |
+ c + "'"); |
|
851 |
} |
|
852 |
} |
|
853 |
} |
|
854 |
||
855 |
/** |
|
856 |
* "Decode" a module name that has been read from the constant pool. |
|
857 |
*/ |
|
858 |
String decodeModuleName(int index, String value) { |
|
859 |
int len = value.length(); |
|
860 |
if (len == 0) { |
|
861 |
throw invalidModuleDescriptor("CONSTANT_Module at entry " |
|
862 |
+ index + " is zero length"); |
|
863 |
} |
|
864 |
int i = 0; |
|
865 |
while (i < len) { |
|
866 |
int cp = value.codePointAt(i); |
|
867 |
if (cp == ':' || cp == '@' || cp < 0x20) { |
|
868 |
throw invalidModuleDescriptor("CONSTANT_Module at entry " |
|
869 |
+ index + " has illegal character: " |
|
870 |
+ Character.getName(cp)); |
|
871 |
} |
|
872 |
||
873 |
// blackslash is the escape character |
|
874 |
if (cp == '\\') |
|
875 |
return decodeModuleName(index, i, value); |
|
876 |
||
877 |
i += Character.charCount(cp); |
|
878 |
} |
|
879 |
return value; |
|
880 |
} |
|
881 |
||
882 |
/** |
|
883 |
* "Decode" a module name that has been read from the constant pool and |
|
884 |
* partly checked for illegal characters (up to position {@code i}). |
|
885 |
*/ |
|
886 |
String decodeModuleName(int index, int i, String value) { |
|
887 |
StringBuilder sb = new StringBuilder(); |
|
888 |
||
889 |
// copy the code points that have been checked |
|
890 |
int j = 0; |
|
891 |
while (j < i) { |
|
892 |
int cp = value.codePointAt(j); |
|
893 |
sb.appendCodePoint(cp); |
|
894 |
j += Character.charCount(cp); |
|
895 |
} |
|
896 |
||
897 |
// decode from position {@code i} to end |
|
898 |
int len = value.length(); |
|
899 |
while (i < len) { |
|
900 |
int cp = value.codePointAt(i); |
|
901 |
if (cp == ':' || cp == '@' || cp < 0x20) { |
|
902 |
throw invalidModuleDescriptor("CONSTANT_Module at entry " |
|
903 |
+ index + " has illegal character: " |
|
904 |
+ Character.getName(cp)); |
|
905 |
} |
|
906 |
||
907 |
// blackslash is the escape character |
|
908 |
if (cp == '\\') { |
|
909 |
j = i + Character.charCount(cp); |
|
910 |
if (j >= len) { |
|
911 |
throw invalidModuleDescriptor("CONSTANT_Module at entry " |
|
912 |
+ index + " has illegal " |
|
913 |
+ "escape sequence"); |
|
914 |
} |
|
915 |
int next = value.codePointAt(j); |
|
916 |
if (next != '\\' && next != ':' && next != '@') { |
|
917 |
throw invalidModuleDescriptor("CONSTANT_Module at entry " |
|
918 |
+ index + " has illegal " |
|
919 |
+ "escape sequence"); |
|
920 |
} |
|
921 |
sb.appendCodePoint(next); |
|
922 |
i += Character.charCount(next); |
|
923 |
} else { |
|
924 |
sb.appendCodePoint(cp); |
|
925 |
} |
|
926 |
||
927 |
i += Character.charCount(cp); |
|
928 |
} |
|
929 |
return sb.toString(); |
|
930 |
} |
|
931 |
} |
|
932 |
||
933 |
/** |
|
934 |
* A DataInput implementation that reads from a ByteBuffer. |
|
935 |
*/ |
|
936 |
private static class DataInputWrapper implements DataInput { |
|
937 |
private final ByteBuffer bb; |
|
938 |
||
939 |
DataInputWrapper(ByteBuffer bb) { |
|
940 |
this.bb = bb; |
|
941 |
} |
|
942 |
||
943 |
@Override |
|
944 |
public void readFully(byte b[]) throws IOException { |
|
945 |
readFully(b, 0, b.length); |
|
946 |
} |
|
947 |
||
948 |
@Override |
|
949 |
public void readFully(byte b[], int off, int len) throws IOException { |
|
950 |
try { |
|
951 |
bb.get(b, off, len); |
|
952 |
} catch (BufferUnderflowException e) { |
|
953 |
throw new EOFException(e.getMessage()); |
|
954 |
} |
|
955 |
} |
|
956 |
||
957 |
@Override |
|
958 |
public int skipBytes(int n) { |
|
959 |
int skip = Math.min(n, bb.remaining()); |
|
960 |
bb.position(bb.position() + skip); |
|
961 |
return skip; |
|
962 |
} |
|
963 |
||
964 |
@Override |
|
965 |
public boolean readBoolean() throws IOException { |
|
966 |
try { |
|
967 |
int ch = bb.get(); |
|
968 |
return (ch != 0); |
|
969 |
} catch (BufferUnderflowException e) { |
|
970 |
throw new EOFException(e.getMessage()); |
|
971 |
} |
|
972 |
} |
|
973 |
||
974 |
@Override |
|
975 |
public byte readByte() throws IOException { |
|
976 |
try { |
|
977 |
return bb.get(); |
|
978 |
} catch (BufferUnderflowException e) { |
|
979 |
throw new EOFException(e.getMessage()); |
|
980 |
} |
|
981 |
} |
|
982 |
||
983 |
@Override |
|
984 |
public int readUnsignedByte() throws IOException { |
|
985 |
try { |
|
986 |
return ((int) bb.get()) & 0xff; |
|
987 |
} catch (BufferUnderflowException e) { |
|
988 |
throw new EOFException(e.getMessage()); |
|
989 |
} |
|
990 |
} |
|
991 |
||
992 |
@Override |
|
993 |
public short readShort() throws IOException { |
|
994 |
try { |
|
995 |
return bb.getShort(); |
|
996 |
} catch (BufferUnderflowException e) { |
|
997 |
throw new EOFException(e.getMessage()); |
|
998 |
} |
|
999 |
} |
|
1000 |
||
1001 |
@Override |
|
1002 |
public int readUnsignedShort() throws IOException { |
|
1003 |
try { |
|
1004 |
return ((int) bb.getShort()) & 0xffff; |
|
1005 |
} catch (BufferUnderflowException e) { |
|
1006 |
throw new EOFException(e.getMessage()); |
|
1007 |
} |
|
1008 |
} |
|
1009 |
||
1010 |
@Override |
|
1011 |
public char readChar() throws IOException { |
|
1012 |
try { |
|
1013 |
return bb.getChar(); |
|
1014 |
} catch (BufferUnderflowException e) { |
|
1015 |
throw new EOFException(e.getMessage()); |
|
1016 |
} |
|
1017 |
} |
|
1018 |
||
1019 |
@Override |
|
1020 |
public int readInt() throws IOException { |
|
1021 |
try { |
|
1022 |
return bb.getInt(); |
|
1023 |
} catch (BufferUnderflowException e) { |
|
1024 |
throw new EOFException(e.getMessage()); |
|
1025 |
} |
|
1026 |
} |
|
1027 |
||
1028 |
@Override |
|
1029 |
public long readLong() throws IOException { |
|
1030 |
try { |
|
1031 |
return bb.getLong(); |
|
1032 |
} catch (BufferUnderflowException e) { |
|
1033 |
throw new EOFException(e.getMessage()); |
|
1034 |
} |
|
1035 |
} |
|
1036 |
||
1037 |
@Override |
|
1038 |
public float readFloat() throws IOException { |
|
1039 |
try { |
|
1040 |
return bb.getFloat(); |
|
1041 |
} catch (BufferUnderflowException e) { |
|
1042 |
throw new EOFException(e.getMessage()); |
|
1043 |
} |
|
1044 |
} |
|
1045 |
||
1046 |
@Override |
|
1047 |
public double readDouble() throws IOException { |
|
1048 |
try { |
|
1049 |
return bb.getDouble(); |
|
1050 |
} catch (BufferUnderflowException e) { |
|
1051 |
throw new EOFException(e.getMessage()); |
|
1052 |
} |
|
1053 |
} |
|
1054 |
||
1055 |
@Override |
|
1056 |
public String readLine() { |
|
1057 |
throw new RuntimeException("not implemented"); |
|
1058 |
} |
|
1059 |
||
1060 |
@Override |
|
1061 |
public String readUTF() throws IOException { |
|
1062 |
// ### Need to measure the performance and feasibility of using |
|
1063 |
// the UTF-8 decoder instead. |
|
1064 |
return DataInputStream.readUTF(this); |
|
1065 |
} |
|
1066 |
} |
|
1067 |
||
1068 |
/** |
|
1069 |
* Returns an InvalidModuleDescriptorException with the given detail |
|
1070 |
* message |
|
1071 |
*/ |
|
1072 |
private static InvalidModuleDescriptorException |
|
1073 |
invalidModuleDescriptor(String msg) { |
|
1074 |
return new InvalidModuleDescriptorException(msg); |
|
1075 |
} |
|
1076 |
||
1077 |
/** |
|
1078 |
* Returns an InvalidModuleDescriptorException with a detail message to |
|
1079 |
* indicate that the class file is truncated. |
|
1080 |
*/ |
|
1081 |
private static InvalidModuleDescriptorException truncatedModuleDescriptor() { |
|
1082 |
return invalidModuleDescriptor("Truncated module-info.class"); |
|
1083 |
} |
|
1084 |
||
1085 |
} |