diff options
Diffstat (limited to 'src/proguard/classfile/visitor/ExceptionExcludedOffsetFilter.java')
-rw-r--r-- | src/proguard/classfile/visitor/ExceptionExcludedOffsetFilter.java | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/src/proguard/classfile/visitor/ExceptionExcludedOffsetFilter.java b/src/proguard/classfile/visitor/ExceptionExcludedOffsetFilter.java new file mode 100644 index 0000000..3911e39 --- /dev/null +++ b/src/proguard/classfile/visitor/ExceptionExcludedOffsetFilter.java @@ -0,0 +1,64 @@ +/* + * 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.attribute.*; +import proguard.classfile.attribute.visitor.ExceptionInfoVisitor; + +/** + * This <code>ExceptionInfoVisitor</code> delegates its visits to another given + * <code>ExceptionInfoVisitor</code>, but only when the visited exception + * does not cover the instruction at the given offset. + * + * @author Eric Lafortune + */ +public class ExceptionExcludedOffsetFilter +implements ExceptionInfoVisitor +{ + private final int instructionOffset; + private final ExceptionInfoVisitor exceptionInfoVisitor; + + + /** + * Creates a new ExceptionExcludedOffsetFilter. + * @param instructionOffset the instruction offset. + * @param exceptionInfoVisitor the ExceptionInfoVisitor to which visits + * will be delegated. + */ + public ExceptionExcludedOffsetFilter(int instructionOffset, + ExceptionInfoVisitor exceptionInfoVisitor) + { + this.instructionOffset = instructionOffset; + this.exceptionInfoVisitor = exceptionInfoVisitor; + } + + + // Implementations for ExceptionInfoVisitor. + + public void visitExceptionInfo(Clazz clazz, Method method, CodeAttribute codeAttribute, ExceptionInfo exceptionInfo) + { + if (!exceptionInfo.isApplicable(instructionOffset)) + { + exceptionInfoVisitor.visitExceptionInfo(clazz, method, codeAttribute, exceptionInfo); + } + } +} |