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-rw-r--r--src/proguard/classfile/editor/ComparableConstant.java276
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diff --git a/src/proguard/classfile/editor/ComparableConstant.java b/src/proguard/classfile/editor/ComparableConstant.java
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--- a/src/proguard/classfile/editor/ComparableConstant.java
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-/*
- * ProGuard -- shrinking, optimization, obfuscation, and preverification
- * of Java bytecode.
- *
- * Copyright (c) 2002-2014 Eric Lafortune (eric@graphics.cornell.edu)
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
- *
- * This program 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 for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-package proguard.classfile.editor;
-
-import proguard.classfile.*;
-import proguard.classfile.constant.*;
-import proguard.classfile.constant.visitor.ConstantVisitor;
-import proguard.classfile.util.SimplifiedVisitor;
-
-
-/**
- * This class is a <code>Comparable</code> wrapper of <code>Constant</code>
- * objects. It can store an index, in order to identify the constant pool
- * entry after it has been sorted. The comparison is primarily based on the
- * types of the constant pool entries, and secondarily on the contents of
- * the constant pool entries.
- *
- * @author Eric Lafortune
- */
-class ComparableConstant
-extends SimplifiedVisitor
-implements Comparable, ConstantVisitor
-{
- private static final int[] PRIORITIES = new int[19];
- static
- {
- PRIORITIES[ClassConstants.CONSTANT_Integer] = 0; // Possibly byte index (ldc).
- PRIORITIES[ClassConstants.CONSTANT_Float] = 1;
- PRIORITIES[ClassConstants.CONSTANT_String] = 2;
- PRIORITIES[ClassConstants.CONSTANT_Class] = 3;
- PRIORITIES[ClassConstants.CONSTANT_Long] = 4; // Always wide index (ldc2_w).
- PRIORITIES[ClassConstants.CONSTANT_Double] = 5; // Always wide index (ldc2_w).
- PRIORITIES[ClassConstants.CONSTANT_Fieldref] = 6; // Always wide index (getfield,...).
- PRIORITIES[ClassConstants.CONSTANT_Methodref] = 7; // Always wide index (invokespecial,...).
- PRIORITIES[ClassConstants.CONSTANT_InterfaceMethodref] = 8; // Always wide index (invokeinterface).
- PRIORITIES[ClassConstants.CONSTANT_InvokeDynamic] = 9; // Always wide index (invokedynamic).
- PRIORITIES[ClassConstants.CONSTANT_MethodHandle] = 10;
- PRIORITIES[ClassConstants.CONSTANT_NameAndType] = 11;
- PRIORITIES[ClassConstants.CONSTANT_MethodType] = 12;
- PRIORITIES[ClassConstants.CONSTANT_Utf8] = 13;
- }
-
- private final Clazz clazz;
- private final int thisIndex;
- private final Constant thisConstant;
-
- private Constant otherConstant;
- private int result;
-
-
- public ComparableConstant(Clazz clazz, int index, Constant constant)
- {
- this.clazz = clazz;
- this.thisIndex = index;
- this.thisConstant = constant;
- }
-
-
- public int getIndex()
- {
- return thisIndex;
- }
-
-
- public Constant getConstant()
- {
- return thisConstant;
- }
-
-
- // Implementations for Comparable.
-
- public int compareTo(Object other)
- {
- ComparableConstant otherComparableConstant = (ComparableConstant)other;
-
- otherConstant = otherComparableConstant.thisConstant;
-
- // Compare based on the original indices, if the actual constant pool
- // entries are the same.
- if (thisConstant == otherConstant)
- {
- int otherIndex = otherComparableConstant.thisIndex;
-
- return thisIndex < otherIndex ? -1 :
- thisIndex == otherIndex ? 0 :
- 1;
- }
-
- // Compare based on the tags, if they are different.
- int thisTag = thisConstant.getTag();
- int otherTag = otherConstant.getTag();
-
- if (thisTag != otherTag)
- {
- return PRIORITIES[thisTag] < PRIORITIES[otherTag] ? -1 : 1;
- }
-
- // Otherwise compare based on the contents of the Constant objects.
- thisConstant.accept(clazz, this);
-
- return result;
- }
-
-
- // Implementations for ConstantVisitor.
-
- public void visitIntegerConstant(Clazz clazz, IntegerConstant integerConstant)
- {
- int value = integerConstant.getValue();
- int otherValue = ((IntegerConstant)otherConstant).getValue();
- result = value < otherValue ? -1 :
- value == otherValue ? 0 :
- 1;
- }
-
- public void visitLongConstant(Clazz clazz, LongConstant longConstant)
- {
- long value = longConstant.getValue();
- long otherValue = ((LongConstant)otherConstant).getValue();
- result = value < otherValue ? -1 :
- value == otherValue ? 0 :
- 1;
- }
-
- public void visitFloatConstant(Clazz clazz, FloatConstant floatConstant)
- {
- result = Float.compare(floatConstant.getValue(),
- ((FloatConstant)otherConstant).getValue());
- }
-
- public void visitDoubleConstant(Clazz clazz, DoubleConstant doubleConstant)
- {
- result = Double.compare(doubleConstant.getValue(),
- ((DoubleConstant)otherConstant).getValue());
- }
-
- public void visitStringConstant(Clazz clazz, StringConstant stringConstant)
- {
- result = stringConstant.getString(clazz).compareTo(((StringConstant)otherConstant).getString(clazz));
- }
-
- public void visitUtf8Constant(Clazz clazz, Utf8Constant utf8Constant)
- {
- result = utf8Constant.getString().compareTo(((Utf8Constant)otherConstant).getString());
- }
-
- public void visitInvokeDynamicConstant(Clazz clazz, InvokeDynamicConstant invokeDynamicConstant)
- {
- InvokeDynamicConstant otherInvokeDynamicConstant = (InvokeDynamicConstant)otherConstant;
-
- int index = invokeDynamicConstant.getBootstrapMethodAttributeIndex();
- int otherIndex = otherInvokeDynamicConstant.getBootstrapMethodAttributeIndex();
-
- result = index < otherIndex ? -1 :
- index > otherIndex ? 1 :
- compare(invokeDynamicConstant.getName(clazz),
- invokeDynamicConstant.getType(clazz),
- otherInvokeDynamicConstant.getName(clazz),
- otherInvokeDynamicConstant.getType(clazz));
- }
-
- public void visitMethodHandleConstant(Clazz clazz, MethodHandleConstant methodHandleConstant)
- {
- MethodHandleConstant otherMethodHandleConstant = (MethodHandleConstant)otherConstant;
-
- int kind = methodHandleConstant.getReferenceKind();
- int otherKind = otherMethodHandleConstant.getReferenceKind();
-
- result = kind < otherKind ? -1 :
- kind > otherKind ? 1 :
- compare(methodHandleConstant.getClassName(clazz),
- methodHandleConstant.getName(clazz),
- methodHandleConstant.getType(clazz),
- otherMethodHandleConstant.getClassName(clazz),
- otherMethodHandleConstant.getName(clazz),
- otherMethodHandleConstant.getType(clazz));
- }
-
- public void visitAnyRefConstant(Clazz clazz, RefConstant refConstant)
- {
- RefConstant otherRefConstant = (RefConstant)otherConstant;
- result = compare(refConstant.getClassName(clazz),
- refConstant.getName(clazz),
- refConstant.getType(clazz),
- otherRefConstant.getClassName(clazz),
- otherRefConstant.getName(clazz),
- otherRefConstant.getType(clazz));
- }
-
- public void visitClassConstant(Clazz clazz, ClassConstant classConstant)
- {
- result = classConstant.getName(clazz).compareTo(((ClassConstant)otherConstant).getName(clazz));
- }
-
- public void visitMethodTypeConstant(Clazz clazz, MethodTypeConstant MethodTypeConstant)
- {
- MethodTypeConstant otherMethodTypeConstant = (MethodTypeConstant)otherConstant;
- result = MethodTypeConstant.getType(clazz)
- .compareTo
- (otherMethodTypeConstant.getType(clazz));
- }
-
- public void visitNameAndTypeConstant(Clazz clazz, NameAndTypeConstant nameAndTypeConstant)
- {
- NameAndTypeConstant otherNameAndTypeConstant = (NameAndTypeConstant)otherConstant;
- result = compare(nameAndTypeConstant.getName(clazz),
- nameAndTypeConstant.getType(clazz),
- otherNameAndTypeConstant.getName(clazz),
- otherNameAndTypeConstant.getType(clazz));
- }
-
-
- // Implementations for Object.
-
- public boolean equals(Object other)
- {
- return other != null &&
- this.getClass().equals(other.getClass()) &&
- this.getConstant().getClass().equals(((ComparableConstant)other).getConstant().getClass()) &&
- this.compareTo(other) == 0;
- }
-
-
- public int hashCode()
- {
- return this.getClass().hashCode();
- }
-
-
- // Small utility methods.
-
- /**
- * Compares the given two pairs of strings.
- */
- private int compare(String string1a, String string1b,
- String string2a, String string2b)
- {
- int comparison;
- return
- (comparison = string1a.compareTo(string2a)) != 0 ? comparison :
- string1b.compareTo(string2b);
- }
-
-
- /**
- * Compares the given two triplets of strings.
- */
- private int compare(String string1a, String string1b, String string1c,
- String string2a, String string2b, String string2c)
- {
- int comparison;
- return
- (comparison = string1a.compareTo(string2a)) != 0 ? comparison :
- (comparison = string1b.compareTo(string2b)) != 0 ? comparison :
- string1c.compareTo(string2c);
- }
-}
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