# HG changeset patch
# User mhaupt
# Date 1449658974 0
# Node ID 155af84b5cb568184c0604118bd4b35681ca0e19
# Parent 168b03eb59aecdbd4fb8fc977bdeee3c9ee41b99
8081512: Remove sun.invoke.anon classes, or move / co-locate them with tests
Reviewed-by: mchung, sundar
diff -r 168b03eb59ae -r 155af84b5cb5 jdk/src/java.base/share/classes/sun/invoke/anon/AnonymousClassLoader.java
--- a/jdk/src/java.base/share/classes/sun/invoke/anon/AnonymousClassLoader.java Mon Dec 07 17:04:37 2015 +0000
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,234 +0,0 @@
-/*
- * Copyright (c) 2008, 2012, Oracle and/or its affiliates. All rights reserved.
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This code is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 only, as
- * published by the Free Software Foundation. Oracle designates this
- * particular file as subject to the "Classpath" exception as provided
- * by Oracle in the LICENSE file that accompanied this code.
- *
- * This code is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
- * version 2 for more details (a copy is included in the LICENSE file that
- * accompanied this code).
- *
- * You should have received a copy of the GNU General Public License version
- * 2 along with this work; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
- * or visit www.oracle.com if you need additional information or have any
- * questions.
- */
-
-package sun.invoke.anon;
-
-import java.io.EOFException;
-import java.io.IOException;
-import java.lang.reflect.InvocationTargetException;
-import java.lang.reflect.Method;
-
-/**
- * Anonymous class loader. Will load any valid classfile, producing
- * a {@link Class} metaobject, without installing that class in the
- * system dictionary. Therefore, {@link Class#forName(String)} will never
- * produce a reference to an anonymous class.
- *
- * The access permissions of the anonymous class are borrowed from
- * a host class. The new class behaves as if it were an
- * inner class of the host class. It can access the host's private
- * members, if the creator of the class loader has permission to
- * do so (or to create accessible reflective objects).
- *
- * When the anonymous class is loaded, elements of its constant pool
- * can be patched to new values. This provides a hook to pre-resolve
- * named classes in the constant pool to other classes, including
- * anonymous ones. Also, string constants can be pre-resolved to
- * any reference. (The verifier treats non-string, non-class reference
- * constants as plain objects.)
- *
- * Why include the patching function? It makes some use cases much easier.
- * Second, the constant pool needed some internal patching anyway,
- * to anonymize the loaded class itself. Finally, if you are going
- * to use this seriously, you'll want to build anonymous classes
- * on top of pre-existing anonymous classes, and that requires patching.
- *
- *
%%% TO-DO:
- *
- *
needs better documentation
- *
needs more security work (for safe delegation)
- *
needs a clearer story about error processing
- *
patch member references also (use ';' as delimiter char)
- *
patch method references to (conforming) method handles
- *
- *
- * @author jrose
- * @author Remi Forax
- * @see
- * http://blogs.sun.com/jrose/entry/anonymous_classes_in_the_vm
- */
-
-public class AnonymousClassLoader {
- final Class hostClass;
-
- // Privileged constructor.
- private AnonymousClassLoader(Class hostClass) {
- this.hostClass = hostClass;
- }
-
- public static AnonymousClassLoader make(jdk.internal.misc.Unsafe unsafe, Class hostClass) {
- if (unsafe == null) throw new NullPointerException();
- return new AnonymousClassLoader(hostClass);
- }
-
- public Class loadClass(byte[] classFile) {
- if (defineAnonymousClass == null) {
- // no JVM support; try to fake an approximation
- try {
- return fakeLoadClass(new ConstantPoolParser(classFile).createPatch());
- } catch (InvalidConstantPoolFormatException ee) {
- throw new IllegalArgumentException(ee);
- }
- }
- return loadClass(classFile, null);
- }
-
- public Class loadClass(ConstantPoolPatch classPatch) {
- if (defineAnonymousClass == null) {
- // no JVM support; try to fake an approximation
- return fakeLoadClass(classPatch);
- }
- Object[] patches = classPatch.patchArray;
- // Convert class names (this late in the game)
- // to use slash '/' instead of dot '.'.
- // Java likes dots, but the JVM likes slashes.
- for (int i = 0; i < patches.length; i++) {
- Object value = patches[i];
- if (value != null) {
- byte tag = classPatch.getTag(i);
- switch (tag) {
- case ConstantPoolVisitor.CONSTANT_Class:
- if (value instanceof String) {
- if (patches == classPatch.patchArray)
- patches = patches.clone();
- patches[i] = ((String)value).replace('.', '/');
- }
- break;
- case ConstantPoolVisitor.CONSTANT_Fieldref:
- case ConstantPoolVisitor.CONSTANT_Methodref:
- case ConstantPoolVisitor.CONSTANT_InterfaceMethodref:
- case ConstantPoolVisitor.CONSTANT_NameAndType:
- // When/if the JVM supports these patches,
- // we'll probably need to reformat them also.
- // Meanwhile, let the class loader create the error.
- break;
- }
- }
- }
- return loadClass(classPatch.outer.classFile, classPatch.patchArray);
- }
-
- private Class loadClass(byte[] classFile, Object[] patchArray) {
- try {
- return (Class)
- defineAnonymousClass.invoke(unsafe,
- hostClass, classFile, patchArray);
- } catch (Exception ex) {
- throwReflectedException(ex);
- throw new RuntimeException("error loading into "+hostClass, ex);
- }
- }
-
- private static void throwReflectedException(Exception ex) {
- if (ex instanceof InvocationTargetException) {
- Throwable tex = ((InvocationTargetException)ex).getTargetException();
- if (tex instanceof Error)
- throw (Error) tex;
- ex = (Exception) tex;
- }
- if (ex instanceof RuntimeException) {
- throw (RuntimeException) ex;
- }
- }
-
- private Class fakeLoadClass(ConstantPoolPatch classPatch) {
- // Implementation:
- // 1. Make up a new name nobody has used yet.
- // 2. Inspect the tail-header of the class to find the this_class index.
- // 3. Patch the CONSTANT_Class for this_class to the new name.
- // 4. Add other CP entries required by (e.g.) string patches.
- // 5. Flatten Class constants down to their names, making sure that
- // the host class loader can pick them up again accurately.
- // 6. Generate the edited class file bytes.
- //
- // Potential limitations:
- // * The class won't be truly anonymous, and may interfere with others.
- // * Flattened class constants might not work, because of loader issues.
- // * Pseudo-string constants will not flatten down to real strings.
- // * Method handles will (of course) fail to flatten to linkage strings.
- if (true) throw new UnsupportedOperationException("NYI");
- Object[] cpArray;
- try {
- cpArray = classPatch.getOriginalCP();
- } catch (InvalidConstantPoolFormatException ex) {
- throw new RuntimeException(ex);
- }
- int thisClassIndex = classPatch.getParser().getThisClassIndex();
- String thisClassName = (String) cpArray[thisClassIndex];
- synchronized (AnonymousClassLoader.class) {
- thisClassName = thisClassName+"\\|"+(++fakeNameCounter);
- }
- classPatch.putUTF8(thisClassIndex, thisClassName);
- byte[] classFile = null;
- return unsafe.defineClass(null, classFile, 0, classFile.length,
- hostClass.getClassLoader(),
- hostClass.getProtectionDomain());
- }
- private static int fakeNameCounter = 99999;
-
- // ignore two warnings on this line:
- private static jdk.internal.misc.Unsafe unsafe = jdk.internal.misc.Unsafe.getUnsafe();
- // preceding line requires that this class be on the boot class path
-
- private static final Method defineAnonymousClass;
- static {
- Method dac = null;
- Class unsafeClass = unsafe.getClass();
- try {
- dac = unsafeClass.getMethod("defineAnonymousClass",
- Class.class,
- byte[].class,
- Object[].class);
- } catch (Exception ee) {
- dac = null;
- }
- defineAnonymousClass = dac;
- }
-
- private static void noJVMSupport() {
- throw new UnsupportedOperationException("no JVM support for anonymous classes");
- }
-
-
- private static native Class loadClassInternal(Class hostClass,
- byte[] classFile,
- Object[] patchArray);
-
- public static byte[] readClassFile(Class templateClass) throws IOException {
- String templateName = templateClass.getName();
- int lastDot = templateName.lastIndexOf('.');
- java.net.URL url = templateClass.getResource(templateName.substring(lastDot+1)+".class");
- java.net.URLConnection connection = url.openConnection();
- int contentLength = connection.getContentLength();
- if (contentLength < 0)
- throw new IOException("invalid content length "+contentLength);
-
- byte[] b = connection.getInputStream().readAllBytes();
- if (b.length != contentLength)
- throw new EOFException("Expected:" + contentLength + ", read:" + b.length);
-
- return b;
- }
-}
diff -r 168b03eb59ae -r 155af84b5cb5 jdk/src/java.base/share/classes/sun/invoke/anon/ConstantPoolParser.java
--- a/jdk/src/java.base/share/classes/sun/invoke/anon/ConstantPoolParser.java Mon Dec 07 17:04:37 2015 +0000
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,368 +0,0 @@
-/*
- * Copyright (c) 2008, 2011, Oracle and/or its affiliates. All rights reserved.
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This code is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 only, as
- * published by the Free Software Foundation. Oracle designates this
- * particular file as subject to the "Classpath" exception as provided
- * by Oracle in the LICENSE file that accompanied this code.
- *
- * This code is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
- * version 2 for more details (a copy is included in the LICENSE file that
- * accompanied this code).
- *
- * You should have received a copy of the GNU General Public License version
- * 2 along with this work; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
- * or visit www.oracle.com if you need additional information or have any
- * questions.
- */
-
-package sun.invoke.anon;
-
-import java.io.IOException;
-import java.io.OutputStream;
-import java.nio.BufferUnderflowException;
-import java.nio.ByteBuffer;
-
-import static sun.invoke.anon.ConstantPoolVisitor.*;
-
-/** A constant pool parser.
- */
-public class ConstantPoolParser {
- final byte[] classFile;
- final byte[] tags;
- final char[] firstHeader; // maghi, maglo, minor, major, cplen
-
- // these are filled in on first parse:
- int endOffset;
- char[] secondHeader; // flags, this_class, super_class, intlen
-
- // used to decode UTF8 array
- private char[] charArray = new char[80];
-
- /** Creates a constant pool parser.
- * @param classFile an array of bytes containing a class.
- * @throws InvalidConstantPoolFormatException if the header of the class has errors.
- */
- public ConstantPoolParser(byte[] classFile) throws InvalidConstantPoolFormatException {
- this.classFile = classFile;
- this.firstHeader = parseHeader(classFile);
- this.tags = new byte[firstHeader[4]];
- }
-
- /** Create a constant pool parser by loading the bytecodes of the
- * class taken as argument.
- *
- * @param templateClass the class to parse.
- *
- * @throws IOException raised if an I/O occurs when loading
- * the bytecode of the template class.
- * @throws InvalidConstantPoolFormatException if the header of the class has errors.
- *
- * @see #ConstantPoolParser(byte[])
- * @see AnonymousClassLoader#readClassFile(Class)
- */
- public ConstantPoolParser(Class templateClass) throws IOException, InvalidConstantPoolFormatException {
- this(AnonymousClassLoader.readClassFile(templateClass));
- }
-
- /** Creates an empty patch to patch the class file
- * used by the current parser.
- * @return a new class patch.
- */
- public ConstantPoolPatch createPatch() {
- return new ConstantPoolPatch(this);
- }
-
- /** Report the tag of the indicated CP entry.
- * @param index
- * @return one of {@link ConstantPoolVisitor#CONSTANT_Utf8}, etc.
- */
- public byte getTag(int index) {
- getEndOffset(); // trigger an exception if we haven't parsed yet
- return tags[index];
- }
-
- /** Report the length of the constant pool. */
- public int getLength() {
- return firstHeader[4];
- }
-
- /** Report the offset, within the class file, of the start of the constant pool. */
- public int getStartOffset() {
- return firstHeader.length * 2;
- }
-
- /** Report the offset, within the class file, of the end of the constant pool. */
- public int getEndOffset() {
- if (endOffset == 0)
- throw new IllegalStateException("class file has not yet been parsed");
- return endOffset;
- }
-
- /** Report the CP index of this class's own name. */
- public int getThisClassIndex() {
- getEndOffset(); // provoke exception if not yet parsed
- return secondHeader[1];
- }
-
- /** Report the total size of the class file. */
- public int getTailLength() {
- return classFile.length - getEndOffset();
- }
-
- /** Write the head (header plus constant pool)
- * of the class file to the indicated stream.
- */
- public void writeHead(OutputStream out) throws IOException {
- out.write(classFile, 0, getEndOffset());
- }
-
- /** Write the head (header plus constant pool)
- * of the class file to the indicated stream,
- * incorporating the non-null entries of the given array
- * as patches.
- */
- void writePatchedHead(OutputStream out, Object[] patchArray) {
- // this will be useful to partially emulate the class loader on old JVMs
- throw new UnsupportedOperationException("Not yet implemented");
- }
-
- /** Write the tail (everything after the constant pool)
- * of the class file to the indicated stream.
- */
- public void writeTail(OutputStream out) throws IOException {
- out.write(classFile, getEndOffset(), getTailLength());
- }
-
- private static char[] parseHeader(byte[] classFile) throws InvalidConstantPoolFormatException {
- char[] result = new char[5];
- ByteBuffer buffer = ByteBuffer.wrap(classFile);
- for (int i = 0; i < result.length; i++)
- result[i] = (char) getUnsignedShort(buffer);
- int magic = result[0] << 16 | result[1] << 0;
- if (magic != 0xCAFEBABE)
- throw new InvalidConstantPoolFormatException("invalid magic number "+magic);
- // skip major, minor version
- int len = result[4];
- if (len < 1)
- throw new InvalidConstantPoolFormatException("constant pool length < 1");
- return result;
- }
-
- /** Parse the constant pool of the class
- * calling a method visit* each time a constant pool entry is parsed.
- *
- * The order of the calls to visit* is not guaranteed to be the same
- * than the order of the constant pool entry in the bytecode array.
- *
- * @param visitor
- * @throws InvalidConstantPoolFormatException
- */
- public void parse(ConstantPoolVisitor visitor) throws InvalidConstantPoolFormatException {
- ByteBuffer buffer = ByteBuffer.wrap(classFile);
- buffer.position(getStartOffset()); //skip header
-
- Object[] values = new Object[getLength()];
- try {
- parseConstantPool(buffer, values, visitor);
- } catch(BufferUnderflowException e) {
- throw new InvalidConstantPoolFormatException(e);
- }
- if (endOffset == 0) {
- endOffset = buffer.position();
- secondHeader = new char[4];
- for (int i = 0; i < secondHeader.length; i++) {
- secondHeader[i] = (char) getUnsignedShort(buffer);
- }
- }
- resolveConstantPool(values, visitor);
- }
-
- private char[] getCharArray(int utfLength) {
- if (utfLength <= charArray.length)
- return charArray;
- return charArray = new char[utfLength];
- }
-
- private void parseConstantPool(ByteBuffer buffer, Object[] values, ConstantPoolVisitor visitor) throws InvalidConstantPoolFormatException {
- for (int i = 1; i < tags.length; ) {
- byte tag = (byte) getUnsignedByte(buffer);
- assert(tags[i] == 0 || tags[i] == tag);
- tags[i] = tag;
- switch (tag) {
- case CONSTANT_Utf8:
- int utfLen = getUnsignedShort(buffer);
- String value = getUTF8(buffer, utfLen, getCharArray(utfLen));
- visitor.visitUTF8(i, CONSTANT_Utf8, value);
- tags[i] = tag;
- values[i++] = value;
- break;
- case CONSTANT_Integer:
- visitor.visitConstantValue(i, tag, buffer.getInt());
- i++;
- break;
- case CONSTANT_Float:
- visitor.visitConstantValue(i, tag, buffer.getFloat());
- i++;
- break;
- case CONSTANT_Long:
- visitor.visitConstantValue(i, tag, buffer.getLong());
- i+=2;
- break;
- case CONSTANT_Double:
- visitor.visitConstantValue(i, tag, buffer.getDouble());
- i+=2;
- break;
-
- case CONSTANT_Class: // fall through:
- case CONSTANT_String:
- tags[i] = tag;
- values[i++] = new int[] { getUnsignedShort(buffer) };
- break;
-
- case CONSTANT_Fieldref: // fall through:
- case CONSTANT_Methodref: // fall through:
- case CONSTANT_InterfaceMethodref: // fall through:
- case CONSTANT_NameAndType:
- tags[i] = tag;
- values[i++] = new int[] { getUnsignedShort(buffer), getUnsignedShort(buffer) };
- break;
- default:
- throw new AssertionError("invalid constant "+tag);
- }
- }
- }
-
- private void resolveConstantPool(Object[] values, ConstantPoolVisitor visitor) {
- // clean out the int[] values, which are temporary
- for (int beg = 1, end = values.length-1, beg2, end2;
- beg <= end;
- beg = beg2, end = end2) {
- beg2 = end; end2 = beg-1;
- //System.out.println("CP resolve pass: "+beg+".."+end);
- for (int i = beg; i <= end; i++) {
- Object value = values[i];
- if (!(value instanceof int[]))
- continue;
- int[] array = (int[]) value;
- byte tag = tags[i];
- switch (tag) {
- case CONSTANT_String:
- String stringBody = (String) values[array[0]];
- visitor.visitConstantString(i, tag, stringBody, array[0]);
- values[i] = null;
- break;
- case CONSTANT_Class: {
- String className = (String) values[array[0]];
- // use the external form favored by Class.forName:
- className = className.replace('/', '.');
- visitor.visitConstantString(i, tag, className, array[0]);
- values[i] = className;
- break;
- }
- case CONSTANT_NameAndType: {
- String memberName = (String) values[array[0]];
- String signature = (String) values[array[1]];
- visitor.visitDescriptor(i, tag, memberName, signature,
- array[0], array[1]);
- values[i] = new String[] {memberName, signature};
- break;
- }
- case CONSTANT_Fieldref: // fall through:
- case CONSTANT_Methodref: // fall through:
- case CONSTANT_InterfaceMethodref: {
- Object className = values[array[0]];
- Object nameAndType = values[array[1]];
- if (!(className instanceof String) ||
- !(nameAndType instanceof String[])) {
- // one more pass is needed
- if (beg2 > i) beg2 = i;
- if (end2 < i) end2 = i;
- continue;
- }
- String[] nameAndTypeArray = (String[]) nameAndType;
- visitor.visitMemberRef(i, tag,
- (String)className,
- nameAndTypeArray[0],
- nameAndTypeArray[1],
- array[0], array[1]);
- values[i] = null;
- }
- break;
- default:
- continue;
- }
- }
- }
- }
-
- private static int getUnsignedByte(ByteBuffer buffer) {
- return buffer.get() & 0xFF;
- }
-
- private static int getUnsignedShort(ByteBuffer buffer) {
- int b1 = getUnsignedByte(buffer);
- int b2 = getUnsignedByte(buffer);
- return (b1 << 8) + (b2 << 0);
- }
-
- private static String getUTF8(ByteBuffer buffer, int utfLen, char[] charArray) throws InvalidConstantPoolFormatException {
- int utfLimit = buffer.position() + utfLen;
- int index = 0;
- while (buffer.position() < utfLimit) {
- int c = buffer.get() & 0xff;
- if (c > 127) {
- buffer.position(buffer.position() - 1);
- return getUTF8Extended(buffer, utfLimit, charArray, index);
- }
- charArray[index++] = (char)c;
- }
- return new String(charArray, 0, index);
- }
-
- private static String getUTF8Extended(ByteBuffer buffer, int utfLimit, char[] charArray, int index) throws InvalidConstantPoolFormatException {
- int c, c2, c3;
- while (buffer.position() < utfLimit) {
- c = buffer.get() & 0xff;
- switch (c >> 4) {
- case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:
- /* 0xxxxxxx*/
- charArray[index++] = (char)c;
- break;
- case 12: case 13:
- /* 110x xxxx 10xx xxxx*/
- c2 = buffer.get();
- if ((c2 & 0xC0) != 0x80)
- throw new InvalidConstantPoolFormatException(
- "malformed input around byte " + buffer.position());
- charArray[index++] = (char)(((c & 0x1F) << 6) |
- (c2 & 0x3F));
- break;
- case 14:
- /* 1110 xxxx 10xx xxxx 10xx xxxx */
- c2 = buffer.get();
- c3 = buffer.get();
- if (((c2 & 0xC0) != 0x80) || ((c3 & 0xC0) != 0x80))
- throw new InvalidConstantPoolFormatException(
- "malformed input around byte " + (buffer.position()));
- charArray[index++] = (char)(((c & 0x0F) << 12) |
- ((c2 & 0x3F) << 6) |
- ((c3 & 0x3F) << 0));
- break;
- default:
- /* 10xx xxxx, 1111 xxxx */
- throw new InvalidConstantPoolFormatException(
- "malformed input around byte " + buffer.position());
- }
- }
- // The number of chars produced may be less than utflen
- return new String(charArray, 0, index);
- }
-}
diff -r 168b03eb59ae -r 155af84b5cb5 jdk/src/java.base/share/classes/sun/invoke/anon/ConstantPoolPatch.java
--- a/jdk/src/java.base/share/classes/sun/invoke/anon/ConstantPoolPatch.java Mon Dec 07 17:04:37 2015 +0000
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,503 +0,0 @@
-/*
- * Copyright (c) 2008, 2013, Oracle and/or its affiliates. All rights reserved.
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This code is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 only, as
- * published by the Free Software Foundation. Oracle designates this
- * particular file as subject to the "Classpath" exception as provided
- * by Oracle in the LICENSE file that accompanied this code.
- *
- * This code is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
- * version 2 for more details (a copy is included in the LICENSE file that
- * accompanied this code).
- *
- * You should have received a copy of the GNU General Public License version
- * 2 along with this work; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
- * or visit www.oracle.com if you need additional information or have any
- * questions.
- */
-
-package sun.invoke.anon;
-
-import java.io.IOException;
-import java.io.OutputStream;
-import java.util.Arrays;
-import java.util.HashSet;
-import java.util.IdentityHashMap;
-import java.util.Map;
-
-import static sun.invoke.anon.ConstantPoolVisitor.*;
-
-/** A class and its patched constant pool.
- *
- * This class allow to modify (patch) a constant pool
- * by changing the value of its entry.
- * Entry are referenced using index that can be get
- * by parsing the constant pool using
- * {@link ConstantPoolParser#parse(ConstantPoolVisitor)}.
- *
- * @see ConstantPoolVisitor
- * @see ConstantPoolParser#createPatch()
- */
-public class ConstantPoolPatch {
- final ConstantPoolParser outer;
- final Object[] patchArray;
-
- ConstantPoolPatch(ConstantPoolParser outer) {
- this.outer = outer;
- this.patchArray = new Object[outer.getLength()];
- }
-
- /** Create a {@link ConstantPoolParser} and
- * a {@link ConstantPoolPatch} in one step.
- * Equivalent to {@code new ConstantPoolParser(classFile).createPatch()}.
- *
- * @param classFile an array of bytes containing a class.
- * @see #ConstantPoolParser(Class)
- */
- public ConstantPoolPatch(byte[] classFile) throws InvalidConstantPoolFormatException {
- this(new ConstantPoolParser(classFile));
- }
-
- /** Create a {@link ConstantPoolParser} and
- * a {@link ConstantPoolPatch} in one step.
- * Equivalent to {@code new ConstantPoolParser(templateClass).createPatch()}.
- *
- * @param templateClass the class to parse.
- * @see #ConstantPoolParser(Class)
- */
- public ConstantPoolPatch(Class templateClass) throws IOException, InvalidConstantPoolFormatException {
- this(new ConstantPoolParser(templateClass));
- }
-
-
- /** Creates a patch from an existing patch.
- * All changes are copied from that patch.
- * @param patch a patch
- *
- * @see ConstantPoolParser#createPatch()
- */
- public ConstantPoolPatch(ConstantPoolPatch patch) {
- outer = patch.outer;
- patchArray = patch.patchArray.clone();
- }
-
- /** Which parser built this patch? */
- public ConstantPoolParser getParser() {
- return outer;
- }
-
- /** Report the tag at the given index in the constant pool. */
- public byte getTag(int index) {
- return outer.getTag(index);
- }
-
- /** Report the current patch at the given index of the constant pool.
- * Null means no patch will be made.
- * To observe the unpatched entry at the given index, use
- * {@link #getParser()}{@code .}@link ConstantPoolParser#parse(ConstantPoolVisitor)}
- */
- public Object getPatch(int index) {
- Object value = patchArray[index];
- if (value == null) return null;
- switch (getTag(index)) {
- case CONSTANT_Fieldref:
- case CONSTANT_Methodref:
- case CONSTANT_InterfaceMethodref:
- if (value instanceof String)
- value = stripSemis(2, (String) value);
- break;
- case CONSTANT_NameAndType:
- if (value instanceof String)
- value = stripSemis(1, (String) value);
- break;
- }
- return value;
- }
-
- /** Clear all patches. */
- public void clear() {
- Arrays.fill(patchArray, null);
- }
-
- /** Clear one patch. */
- public void clear(int index) {
- patchArray[index] = null;
- }
-
- /** Produce the patches as an array. */
- public Object[] getPatches() {
- return patchArray.clone();
- }
-
- /** Produce the original constant pool as an array. */
- public Object[] getOriginalCP() throws InvalidConstantPoolFormatException {
- return getOriginalCP(0, patchArray.length, -1);
- }
-
- /** Walk the constant pool, applying patches using the given map.
- *
- * @param utf8Map Utf8 strings to modify, if encountered
- * @param classMap Classes (or their names) to modify, if encountered
- * @param valueMap Constant values to modify, if encountered
- * @param deleteUsedEntries if true, delete map entries that are used
- */
- public void putPatches(final Map utf8Map,
- final Map classMap,
- final Map valueMap,
- boolean deleteUsedEntries) throws InvalidConstantPoolFormatException {
- final HashSet usedUtf8Keys;
- final HashSet usedClassKeys;
- final HashSet