| /* |
| * ProGuard -- shrinking, optimization, obfuscation, and preverification |
| * of Java bytecode. |
| * |
| * Copyright (c) 2002-2013 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.attribute.visitor; |
| |
| import proguard.classfile.*; |
| import proguard.classfile.attribute.*; |
| import proguard.classfile.attribute.annotation.*; |
| import proguard.classfile.attribute.preverification.*; |
| import proguard.util.StringMatcher; |
| |
| /** |
| * This AttributeVisitor delegates its visits another AttributeVisitor, but |
| * only when the visited attribute is not empty. For instance, a local variable |
| * table without variables is empty. |
| * |
| * @author Eric Lafortune |
| */ |
| public class NonEmptyAttributeFilter |
| implements AttributeVisitor |
| { |
| private final AttributeVisitor attributeVisitor; |
| |
| |
| /** |
| * Creates a new NonEmptyAttributeFilter. |
| * @param attributeVisitor the <code>AttributeVisitor</code> to which |
| * visits will be delegated. |
| */ |
| public NonEmptyAttributeFilter(AttributeVisitor attributeVisitor) |
| { |
| this.attributeVisitor = attributeVisitor; |
| } |
| |
| |
| // Implementations for AttributeVisitor. |
| |
| public void visitUnknownAttribute(Clazz clazz, UnknownAttribute unknownAttribute) |
| { |
| unknownAttribute.accept(clazz, attributeVisitor); |
| } |
| |
| |
| public void visitBootstrapMethodsAttribute(Clazz clazz, BootstrapMethodsAttribute bootstrapMethodsAttribute) |
| { |
| if (bootstrapMethodsAttribute.u2bootstrapMethodsCount > 0) |
| { |
| bootstrapMethodsAttribute.accept(clazz, attributeVisitor); |
| } |
| } |
| |
| |
| public void visitSourceFileAttribute(Clazz clazz, SourceFileAttribute sourceFileAttribute) |
| { |
| sourceFileAttribute.accept(clazz, attributeVisitor); |
| } |
| |
| |
| public void visitSourceDirAttribute(Clazz clazz, SourceDirAttribute sourceDirAttribute) |
| { |
| sourceDirAttribute.accept(clazz, attributeVisitor); |
| } |
| |
| |
| public void visitInnerClassesAttribute(Clazz clazz, InnerClassesAttribute innerClassesAttribute) |
| { |
| if (innerClassesAttribute.u2classesCount > 0) |
| { |
| innerClassesAttribute.accept(clazz, attributeVisitor); |
| } |
| } |
| |
| |
| public void visitEnclosingMethodAttribute(Clazz clazz, EnclosingMethodAttribute enclosingMethodAttribute) |
| { |
| enclosingMethodAttribute.accept(clazz, attributeVisitor); |
| } |
| |
| |
| public void visitDeprecatedAttribute(Clazz clazz, DeprecatedAttribute deprecatedAttribute) |
| { |
| deprecatedAttribute.accept(clazz, attributeVisitor); |
| } |
| |
| |
| public void visitDeprecatedAttribute(Clazz clazz, Field field, DeprecatedAttribute deprecatedAttribute) |
| { |
| deprecatedAttribute.accept(clazz, field, attributeVisitor); |
| } |
| |
| |
| public void visitDeprecatedAttribute(Clazz clazz, Method method, DeprecatedAttribute deprecatedAttribute) |
| { |
| deprecatedAttribute.accept(clazz, method, attributeVisitor); |
| } |
| |
| |
| public void visitSyntheticAttribute(Clazz clazz, SyntheticAttribute syntheticAttribute) |
| { |
| syntheticAttribute.accept(clazz, attributeVisitor); |
| } |
| |
| |
| public void visitSyntheticAttribute(Clazz clazz, Field field, SyntheticAttribute syntheticAttribute) |
| { |
| syntheticAttribute.accept(clazz, field, attributeVisitor); |
| } |
| |
| |
| public void visitSyntheticAttribute(Clazz clazz, Method method, SyntheticAttribute syntheticAttribute) |
| { |
| syntheticAttribute.accept(clazz, method, attributeVisitor); |
| } |
| |
| |
| public void visitSignatureAttribute(Clazz clazz, SignatureAttribute signatureAttribute) |
| { |
| signatureAttribute.accept(clazz, attributeVisitor); |
| } |
| |
| |
| public void visitSignatureAttribute(Clazz clazz, Field field, SignatureAttribute signatureAttribute) |
| { |
| signatureAttribute.accept(clazz, field, attributeVisitor); |
| } |
| |
| |
| public void visitSignatureAttribute(Clazz clazz, Method method, SignatureAttribute signatureAttribute) |
| { |
| signatureAttribute.accept(clazz, method, attributeVisitor); |
| } |
| |
| |
| public void visitConstantValueAttribute(Clazz clazz, Field field, ConstantValueAttribute constantValueAttribute) |
| { |
| constantValueAttribute.accept(clazz, field, attributeVisitor); |
| } |
| |
| |
| public void visitExceptionsAttribute(Clazz clazz, Method method, ExceptionsAttribute exceptionsAttribute) |
| { |
| if (exceptionsAttribute.u2exceptionIndexTableLength > 0) |
| { |
| exceptionsAttribute.accept(clazz, method, attributeVisitor); |
| } |
| } |
| |
| |
| public void visitCodeAttribute(Clazz clazz, Method method, CodeAttribute codeAttribute) |
| { |
| codeAttribute.accept(clazz, method, attributeVisitor); |
| } |
| |
| |
| public void visitStackMapAttribute(Clazz clazz, Method method, CodeAttribute codeAttribute, StackMapAttribute stackMapAttribute) |
| { |
| if (stackMapAttribute.u2stackMapFramesCount > 0) |
| { |
| stackMapAttribute.accept(clazz, method, codeAttribute, attributeVisitor); |
| } |
| } |
| |
| |
| public void visitStackMapTableAttribute(Clazz clazz, Method method, CodeAttribute codeAttribute, StackMapTableAttribute stackMapTableAttribute) |
| { |
| if (stackMapTableAttribute.u2stackMapFramesCount > 0) |
| { |
| stackMapTableAttribute.accept(clazz, method, codeAttribute, attributeVisitor); |
| } |
| } |
| |
| |
| public void visitLineNumberTableAttribute(Clazz clazz, Method method, CodeAttribute codeAttribute, LineNumberTableAttribute lineNumberTableAttribute) |
| { |
| if (lineNumberTableAttribute.u2lineNumberTableLength > 0) |
| { |
| lineNumberTableAttribute.accept(clazz, method, codeAttribute, attributeVisitor); |
| } |
| } |
| |
| |
| public void visitLocalVariableTableAttribute(Clazz clazz, Method method, CodeAttribute codeAttribute, LocalVariableTableAttribute localVariableTableAttribute) |
| { |
| if (localVariableTableAttribute.u2localVariableTableLength > 0) |
| { |
| localVariableTableAttribute.accept(clazz, method, codeAttribute, attributeVisitor); |
| } |
| } |
| |
| |
| public void visitLocalVariableTypeTableAttribute(Clazz clazz, Method method, CodeAttribute codeAttribute, LocalVariableTypeTableAttribute localVariableTypeTableAttribute) |
| { |
| if (localVariableTypeTableAttribute.u2localVariableTypeTableLength > 0) |
| { |
| localVariableTypeTableAttribute.accept(clazz, method, codeAttribute, attributeVisitor); |
| } |
| } |
| |
| |
| public void visitRuntimeVisibleAnnotationsAttribute(Clazz clazz, RuntimeVisibleAnnotationsAttribute runtimeVisibleAnnotationsAttribute) |
| { |
| if (runtimeVisibleAnnotationsAttribute.u2annotationsCount > 0) |
| { |
| runtimeVisibleAnnotationsAttribute.accept(clazz, attributeVisitor); |
| } |
| } |
| |
| |
| public void visitRuntimeVisibleAnnotationsAttribute(Clazz clazz, Field field, RuntimeVisibleAnnotationsAttribute runtimeVisibleAnnotationsAttribute) |
| { |
| if (runtimeVisibleAnnotationsAttribute.u2annotationsCount > 0) |
| { |
| runtimeVisibleAnnotationsAttribute.accept(clazz, field, attributeVisitor); |
| } |
| } |
| |
| |
| public void visitRuntimeVisibleAnnotationsAttribute(Clazz clazz, Method method, RuntimeVisibleAnnotationsAttribute runtimeVisibleAnnotationsAttribute) |
| { |
| if (runtimeVisibleAnnotationsAttribute.u2annotationsCount > 0) |
| { |
| runtimeVisibleAnnotationsAttribute.accept(clazz, method, attributeVisitor); |
| } |
| } |
| |
| |
| public void visitRuntimeInvisibleAnnotationsAttribute(Clazz clazz, RuntimeInvisibleAnnotationsAttribute runtimeInvisibleAnnotationsAttribute) |
| { |
| if (runtimeInvisibleAnnotationsAttribute.u2annotationsCount > 0) |
| { |
| runtimeInvisibleAnnotationsAttribute.accept(clazz, attributeVisitor); |
| } |
| } |
| |
| |
| public void visitRuntimeInvisibleAnnotationsAttribute(Clazz clazz, Field field, RuntimeInvisibleAnnotationsAttribute runtimeInvisibleAnnotationsAttribute) |
| { |
| if (runtimeInvisibleAnnotationsAttribute.u2annotationsCount > 0) |
| { |
| runtimeInvisibleAnnotationsAttribute.accept(clazz, field, attributeVisitor); |
| } |
| } |
| |
| |
| public void visitRuntimeInvisibleAnnotationsAttribute(Clazz clazz, Method method, RuntimeInvisibleAnnotationsAttribute runtimeInvisibleAnnotationsAttribute) |
| { |
| if (runtimeInvisibleAnnotationsAttribute.u2annotationsCount > 0) |
| { |
| runtimeInvisibleAnnotationsAttribute.accept(clazz, method, attributeVisitor); |
| } |
| } |
| |
| |
| public void visitRuntimeVisibleParameterAnnotationsAttribute(Clazz clazz, Method method, RuntimeVisibleParameterAnnotationsAttribute runtimeVisibleParameterAnnotationsAttribute) |
| { |
| if (runtimeVisibleParameterAnnotationsAttribute.u2parametersCount > 0) |
| { |
| runtimeVisibleParameterAnnotationsAttribute.accept(clazz, method, attributeVisitor); |
| } |
| } |
| |
| |
| public void visitRuntimeInvisibleParameterAnnotationsAttribute(Clazz clazz, Method method, RuntimeInvisibleParameterAnnotationsAttribute runtimeInvisibleParameterAnnotationsAttribute) |
| { |
| if (runtimeInvisibleParameterAnnotationsAttribute.u2parametersCount > 0) |
| { |
| runtimeInvisibleParameterAnnotationsAttribute.accept(clazz, method, attributeVisitor); |
| } |
| } |
| |
| |
| public void visitAnnotationDefaultAttribute(Clazz clazz, Method method, AnnotationDefaultAttribute annotationDefaultAttribute) |
| { |
| annotationDefaultAttribute.accept(clazz, method, attributeVisitor); |
| } |
| } |