diff options
Diffstat (limited to 'src/proguard/classfile/visitor/ConcreteClassDownTraveler.java')
-rw-r--r-- | src/proguard/classfile/visitor/ConcreteClassDownTraveler.java | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/src/proguard/classfile/visitor/ConcreteClassDownTraveler.java b/src/proguard/classfile/visitor/ConcreteClassDownTraveler.java new file mode 100644 index 0000000..ec3fe68 --- /dev/null +++ b/src/proguard/classfile/visitor/ConcreteClassDownTraveler.java @@ -0,0 +1,100 @@ +/* + * 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.*; + + +/** + * This <code>ClassVisitor</code> lets a given <code>ClassVisitor</code> + * travel to the first concrete subclasses down in its hierarchy of abstract + * classes and concrete classes. + * + * @author Eric Lafortune + */ +public class ConcreteClassDownTraveler +implements ClassVisitor +{ + private final ClassVisitor classVisitor; + + + /** + * Creates a new ConcreteClassDownTraveler. + * @param classVisitor the <code>ClassVisitor</code> to + * which visits will be delegated. + */ + public ConcreteClassDownTraveler(ClassVisitor classVisitor) + { + this.classVisitor = classVisitor; + } + + + // Implementations for ClassVisitor. + + public void visitProgramClass(ProgramClass programClass) + { + // Is this an abstract class or an interface? + if ((programClass.getAccessFlags() & + (ClassConstants.INTERNAL_ACC_INTERFACE | + ClassConstants.INTERNAL_ACC_ABSTRACT)) != 0) + { + // Travel down the hierarchy. + Clazz[] subClasses = programClass.subClasses; + if (subClasses != null) + { + for (int index = 0; index < subClasses.length; index++) + { + subClasses[index].accept(this); + } + } + } + else + { + // Visit the class. Don't descend any further. + programClass.accept(classVisitor); + } + } + + + public void visitLibraryClass(LibraryClass libraryClass) + { + // Is this an abstract class or interface? + if ((libraryClass.getAccessFlags() & + (ClassConstants.INTERNAL_ACC_INTERFACE | + ClassConstants.INTERNAL_ACC_ABSTRACT)) != 0) + { + // Travel down the hierarchy. + Clazz[] subClasses = libraryClass.subClasses; + if (subClasses != null) + { + for (int index = 0; index < subClasses.length; index++) + { + subClasses[index].accept(this); + } + } + } + else + { + // Visit the class. Don't descend any further. + libraryClass.accept(classVisitor); + } + } +} |