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Diffstat (limited to 'src/proguard/optimize/info/FieldOptimizationInfo.java')
-rw-r--r--src/proguard/optimize/info/FieldOptimizationInfo.java188
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diff --git a/src/proguard/optimize/info/FieldOptimizationInfo.java b/src/proguard/optimize/info/FieldOptimizationInfo.java
deleted file mode 100644
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--- a/src/proguard/optimize/info/FieldOptimizationInfo.java
+++ /dev/null
@@ -1,188 +0,0 @@
-/*
- * 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.optimize.info;
-
-import proguard.classfile.*;
-import proguard.classfile.attribute.*;
-import proguard.classfile.attribute.visitor.*;
-import proguard.classfile.util.SimplifiedVisitor;
-import proguard.evaluation.ConstantValueFactory;
-import proguard.evaluation.value.*;
-
-/**
- * This class stores some optimization information that can be attached to
- * a field.
- *
- * @author Eric Lafortune
- */
-public class FieldOptimizationInfo
-extends SimplifiedVisitor
-implements AttributeVisitor
-{
- private static final ParticularValueFactory VALUE_FACTORY = new ParticularValueFactory();
- private static final ConstantValueFactory CONSTANT_VALUE_FACTORY = new ConstantValueFactory(VALUE_FACTORY);
- private static final InitialValueFactory INITIAL_VALUE_FACTORY = new InitialValueFactory(VALUE_FACTORY);
-
- private boolean isWritten;
- private boolean isRead;
- private boolean canBeMadePrivate = true;
- private ReferenceValue referencedClass;
- private Value value;
-
-
- public FieldOptimizationInfo(Clazz clazz, Field field)
- {
- int accessFlags = field.getAccessFlags();
-
- isWritten =
- isRead = (accessFlags & ClassConstants.ACC_VOLATILE) != 0;
-
- resetValue(clazz, field);
- }
-
-
- public FieldOptimizationInfo(FieldOptimizationInfo FieldOptimizationInfo)
- {
- this.isWritten = FieldOptimizationInfo.isWritten;
- this.isRead = FieldOptimizationInfo.isRead;
- this.canBeMadePrivate = FieldOptimizationInfo.canBeMadePrivate;
- this.referencedClass = FieldOptimizationInfo.referencedClass;
- this.value = FieldOptimizationInfo.value;
- }
-
-
- public void setWritten()
- {
- isWritten = true;
- }
-
-
- public boolean isWritten()
- {
- return isWritten;
- }
-
-
- public void setRead()
- {
- isRead = true;
- }
-
-
- public boolean isRead()
- {
- return isRead;
- }
-
-
- public void setCanNotBeMadePrivate()
- {
- canBeMadePrivate = false;
- }
-
-
- public boolean canBeMadePrivate()
- {
- return canBeMadePrivate;
- }
-
-
- public void generalizeReferencedClass(ReferenceValue referencedClass)
- {
- this.referencedClass = this.referencedClass != null ?
- this.referencedClass.generalize(referencedClass) :
- referencedClass;
- }
-
-
- public ReferenceValue getReferencedClass()
- {
- return referencedClass;
- }
-
-
- public void resetValue(Clazz clazz, Field field)
- {
- int accessFlags = field.getAccessFlags();
-
- value = null;
-
- // See if we can initialize a static field with a constant value.
- if ((accessFlags & ClassConstants.ACC_STATIC) != 0)
- {
- field.accept(clazz, new AllAttributeVisitor(this));
- }
-
- // Otherwise initialize a non-final field with the default value.
- // Conservatively, even a final field needs to be initialized with the
- // default value, because it may be accessed before it is set.
- if (value == null &&
- (SideEffectInstructionChecker.OPTIMIZE_CONSERVATIVELY ||
- (accessFlags & ClassConstants.ACC_FINAL) == 0))
- {
- value = INITIAL_VALUE_FACTORY.createValue(field.getDescriptor(clazz));
- }
- }
-
-
- public void generalizeValue(Value value)
- {
- this.value = this.value != null ?
- this.value.generalize(value) :
- value;
- }
-
-
- public Value getValue()
- {
- return value;
- }
-
-
- // Implementations for AttributeVisitor.
-
- public void visitAnyAttribute(Clazz clazz, Attribute attribute) {}
-
-
- public void visitConstantValueAttribute(Clazz clazz, Field field, ConstantValueAttribute constantValueAttribute)
- {
- // Retrieve the initial static field value.
- value = CONSTANT_VALUE_FACTORY.constantValue(clazz, constantValueAttribute.u2constantValueIndex);
- }
-
-
- // Small utility methods.
-
- public static void setFieldOptimizationInfo(Clazz clazz, Field field)
- {
- field.setVisitorInfo(new FieldOptimizationInfo(clazz, field));
- }
-
-
- public static FieldOptimizationInfo getFieldOptimizationInfo(Field field)
- {
- Object visitorInfo = field.getVisitorInfo();
-
- return visitorInfo instanceof FieldOptimizationInfo ?
- (FieldOptimizationInfo)visitorInfo :
- null;
- }
-}