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-rw-r--r--src/proguard/shrink/SignatureUsageMarker.java120
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diff --git a/src/proguard/shrink/SignatureUsageMarker.java b/src/proguard/shrink/SignatureUsageMarker.java
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--- a/src/proguard/shrink/SignatureUsageMarker.java
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@@ -1,120 +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.shrink;
-
-import proguard.classfile.*;
-import proguard.classfile.attribute.*;
-import proguard.classfile.attribute.visitor.AttributeVisitor;
-import proguard.classfile.constant.Constant;
-import proguard.classfile.constant.visitor.ConstantVisitor;
-import proguard.classfile.util.SimplifiedVisitor;
-import proguard.classfile.visitor.ClassVisitor;
-
-/**
- * This AttributeVisitor recursively marks all Signature attributes that it
- * visits and that point to used classes.
- *
- * @see UsageMarker
- *
- * @author Eric Lafortune
- */
-public class SignatureUsageMarker
-extends SimplifiedVisitor
-implements AttributeVisitor,
- ClassVisitor,
- ConstantVisitor
-{
- private final UsageMarker usageMarker;
-
- // Fields acting as a return parameters for several methods.
- private boolean attributeUsed;
-
-
- /**
- * Creates a new SignatureUsageMarker.
- * @param usageMarker the usage marker that is used to mark the classes
- * and class members.
- */
- public SignatureUsageMarker(UsageMarker usageMarker)
- {
- this.usageMarker = usageMarker;
- }
-
-
- // Implementations for AttributeVisitor.
-
- public void visitAnyAttribute(Clazz clazz, Attribute attribute) {}
-
-
- public void visitSignatureAttribute(Clazz clazz, SignatureAttribute signatureAttribute)
- {
- // Only keep the signature if any of its classes are used.
- attributeUsed = false;
- signatureAttribute.referencedClassesAccept(this);
-
- if (attributeUsed)
- {
- // We got a positive used flag, so the signature is useful.
- usageMarker.markAsUsed(signatureAttribute);
-
- markConstant(clazz, signatureAttribute.u2attributeNameIndex);
- markConstant(clazz, signatureAttribute.u2signatureIndex);
- }
- }
-
-
- // Implementations for ClassVisitor.
-
- public void visitLibraryClass(LibraryClass libraryClass)
- {
- attributeUsed = true;
- }
-
-
- public void visitProgramClass(ProgramClass programClass)
- {
- // Don't keep the signature if one of its classes is not used.
- if (usageMarker.isUsed(programClass))
- {
- attributeUsed = true;
- }
- }
-
-
- // Implementations for ConstantVisitor.
-
- public void visitAnyConstant(Clazz clazz, Constant constant)
- {
- usageMarker.markAsUsed(constant);
- }
-
-
- // Small utility methods.
-
- /**
- * Marks the given constant pool entry of the given class.
- */
- private void markConstant(Clazz clazz, int index)
- {
- clazz.constantPoolEntryAccept(index, this);
- }
-}