diff -r b02fa8bb730c -r c275389a3680 langtools/src/jdk.compiler/share/classes/com/sun/tools/classfile/ReferenceFinder.java --- a/langtools/src/jdk.compiler/share/classes/com/sun/tools/classfile/ReferenceFinder.java Thu May 28 16:13:55 2015 -0700 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,240 +0,0 @@ -/* - * Copyright (c) 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 com.sun.tools.classfile; - -import java.util.ArrayList; -import java.util.HashSet; -import java.util.List; -import java.util.Objects; -import java.util.Set; -import com.sun.tools.classfile.Instruction.TypeKind; -import static com.sun.tools.classfile.ConstantPool.*; - -/** - * A utility class to find where in a ClassFile references - * a {@link CONSTANT_Methodref_info method}, - * a {@link CONSTANT_InterfaceMethodref_info interface method, - * or a {@link CONSTANT_Fieldref_info field}. - */ -public final class ReferenceFinder { - /** - * Filter for ReferenceFinder of what constant pool entries for reference lookup. - */ - public interface Filter { - /** - * Decides if the given CPRefInfo entry should be accepted or filtered. - * - * @param cpool ConstantPool of the ClassFile being parsed - * @param cpref constant pool entry representing a reference to - * a fields method, and interface method. - * @return {@code true} if accepted; otherwise {@code false} - */ - boolean accept(ConstantPool cpool, CPRefInfo cpref); - } - - /** - * Visitor of individual method of a ClassFile that references the - * accepted field, method, or interface method references. - */ - public interface Visitor { - /** - * Invoked for a method containing one or more accepted CPRefInfo entries - * - * @param cf ClassFile - * @param method Method that does the references the accepted references - * @param refs Accepted constant pool method/field reference - */ - void visit(ClassFile cf, Method method, List refConstantPool); - } - - private final Filter filter; - private final Visitor visitor; - - /** - * Constructor. - */ - public ReferenceFinder(Filter filter, Visitor visitor) { - this.filter = Objects.requireNonNull(filter); - this.visitor = Objects.requireNonNull(visitor); - } - - /** - * Parses a given ClassFile and invoke the visitor if there is any reference - * to the constant pool entries referencing field, method, or - * interface method that are accepted. This method will return - * {@code true} if there is one or more accepted constant pool entries - * to lookup; otherwise, it will return {@code false}. - * - * @param cf ClassFile - * @return {@code true} if the given class file is processed to lookup - * references - * @throws ConstantPoolException if an error of the constant pool - */ - public boolean parse(ClassFile cf) throws ConstantPoolException { - List cprefs = new ArrayList<>(); - int index = 1; - for (ConstantPool.CPInfo cpInfo : cf.constant_pool.entries()) { - if (cpInfo.accept(cpVisitor, cf.constant_pool)) { - cprefs.add(index); - } - index += cpInfo.size(); - } - - if (cprefs.isEmpty()) { - return false; - } - - for (Method m : cf.methods) { - Set ids = new HashSet<>(); - Code_attribute c_attr = (Code_attribute) m.attributes.get(Attribute.Code); - if (c_attr != null) { - for (Instruction instr : c_attr.getInstructions()) { - int idx = instr.accept(codeVisitor, cprefs); - if (idx > 0) { - ids.add(idx); - } - } - } - if (ids.size() > 0) { - List refInfos = new ArrayList<>(ids.size()); - for (int id : ids) { - refInfos.add(CPRefInfo.class.cast(cf.constant_pool.get(id))); - } - visitor.visit(cf, m, refInfos); - } - } - return true; - } - - private ConstantPool.Visitor cpVisitor = - new ConstantPool.Visitor() - { - public Boolean visitClass(CONSTANT_Class_info info, ConstantPool cpool) { - return false; - } - - public Boolean visitInterfaceMethodref(CONSTANT_InterfaceMethodref_info info, ConstantPool cpool) { - return filter.accept(cpool, info); - } - - public Boolean visitMethodref(CONSTANT_Methodref_info info, ConstantPool cpool) { - return filter.accept(cpool, info); - } - - public Boolean visitFieldref(CONSTANT_Fieldref_info info, ConstantPool cpool) { - return filter.accept(cpool, info); - } - - public Boolean visitDouble(CONSTANT_Double_info info, ConstantPool cpool) { - return false; - } - - public Boolean visitFloat(CONSTANT_Float_info info, ConstantPool cpool) { - return false; - } - - public Boolean visitInteger(CONSTANT_Integer_info info, ConstantPool cpool) { - return false; - } - - public Boolean visitInvokeDynamic(CONSTANT_InvokeDynamic_info info, ConstantPool cpool) { - return false; - } - - public Boolean visitLong(CONSTANT_Long_info info, ConstantPool cpool) { - return false; - } - - public Boolean visitNameAndType(CONSTANT_NameAndType_info info, ConstantPool cpool) { - return false; - } - - public Boolean visitMethodHandle(CONSTANT_MethodHandle_info info, ConstantPool cpool) { - return false; - } - - public Boolean visitMethodType(CONSTANT_MethodType_info info, ConstantPool cpool) { - return false; - } - - public Boolean visitString(CONSTANT_String_info info, ConstantPool cpool) { - return false; - } - - public Boolean visitUtf8(CONSTANT_Utf8_info info, ConstantPool cpool) { - return false; - } - }; - - private Instruction.KindVisitor> codeVisitor = - new Instruction.KindVisitor>() - { - public Integer visitNoOperands(Instruction instr, List p) { - return 0; - } - - public Integer visitArrayType(Instruction instr, TypeKind kind, List p) { - return 0; - } - - public Integer visitBranch(Instruction instr, int offset, List p) { - return 0; - } - - public Integer visitConstantPoolRef(Instruction instr, int index, List p) { - return p.contains(index) ? index : 0; - } - - public Integer visitConstantPoolRefAndValue(Instruction instr, int index, int value, List p) { - return p.contains(index) ? index : 0; - } - - public Integer visitLocal(Instruction instr, int index, List p) { - return 0; - } - - public Integer visitLocalAndValue(Instruction instr, int index, int value, List p) { - return 0; - } - - public Integer visitLookupSwitch(Instruction instr, int default_, int npairs, int[] matches, int[] offsets, List p) { - return 0; - } - - public Integer visitTableSwitch(Instruction instr, int default_, int low, int high, int[] offsets, List p) { - return 0; - } - - public Integer visitValue(Instruction instr, int value, List p) { - return 0; - } - - public Integer visitUnknown(Instruction instr, List p) { - return 0; - } - }; -} -