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Diffstat (limited to 'src/proguard/classfile/visitor/ImplementedClassConstantFilter.java')
-rw-r--r-- | src/proguard/classfile/visitor/ImplementedClassConstantFilter.java | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/src/proguard/classfile/visitor/ImplementedClassConstantFilter.java b/src/proguard/classfile/visitor/ImplementedClassConstantFilter.java new file mode 100644 index 0000000..6fe2e7d --- /dev/null +++ b/src/proguard/classfile/visitor/ImplementedClassConstantFilter.java @@ -0,0 +1,69 @@ +/* + * ProGuard -- shrinking, optimization, obfuscation, and preverification + * of Java bytecode. + * + * Copyright (c) 2002-2009 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.visitor; + +import proguard.classfile.*; +import proguard.classfile.constant.visitor.ConstantVisitor; +import proguard.classfile.constant.ClassConstant; +import proguard.classfile.util.SimplifiedVisitor; + +/** + * This <code>ConstantVisitor</code> delegates its visits to class constants + * to another given <code>ConstantVisitor</code>, except for classes that + * extend or implement a given class. This exception includes the class itself. + * + * @author Eric Lafortune + */ +public class ImplementedClassConstantFilter +extends SimplifiedVisitor +implements ConstantVisitor +{ + private final Clazz implementedClass; + private final ConstantVisitor constantVisitor; + + + /** + * Creates a new ImplementedClassConstantFilter. + * @param implementedClass the class whose implementations will not be + * visited. + * @param constantVisitor the <code>ConstantVisitor</code> to which visits + * will be delegated. + */ + public ImplementedClassConstantFilter(Clazz implementedClass, + ConstantVisitor constantVisitor) + { + this.implementedClass = implementedClass; + this.constantVisitor = constantVisitor; + } + + + // Implementations for ConstantVisitor. + + public void visitClassConstant(Clazz clazz, ClassConstant classConstant) + { + Clazz referencedClass = classConstant.referencedClass; + if (referencedClass == null || + !referencedClass.extendsOrImplements(implementedClass)) + { + constantVisitor.visitClassConstant(clazz, classConstant); + } + } +}
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