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-rw-r--r--src/proguard/classfile/constant/visitor/ConstantTagFilter.java86
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diff --git a/src/proguard/classfile/constant/visitor/ConstantTagFilter.java b/src/proguard/classfile/constant/visitor/ConstantTagFilter.java
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+/*
+ * ProGuard -- shrinking, optimization, obfuscation, and preverification
+ * of Java bytecode.
+ *
+ * Copyright (c) 2002-2011 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.constant.visitor;
+
+import proguard.classfile.Clazz;
+import proguard.classfile.constant.*;
+import proguard.classfile.util.SimplifiedVisitor;
+
+/**
+ * This <code>ConstantVisitor</code> delegates its visits to one or more
+ * specified types of constants.
+ *
+ * @author Eric Lafortune
+ */
+public class ConstantTagFilter
+extends SimplifiedVisitor
+implements ConstantVisitor
+{
+ private final int constantTagMask;
+ private final ConstantVisitor constantVisitor;
+
+
+ /**
+ * Creates a new ConstantTagFilter.
+ * @param constantTag the type of constants for which visits will be
+ * delegated.
+ * @param constantVisitor the <code>ConstantVisitor</code> to which visits
+ * will be delegated.
+ */
+ public ConstantTagFilter(int constantTag,
+ ConstantVisitor constantVisitor)
+ {
+ this.constantTagMask = 1 << constantTag;
+ this.constantVisitor = constantVisitor;
+ }
+
+
+ /**
+ * Creates a new ConstantTagFilter.
+ * @param constantTags the types of constants for which visits will be
+ * delegated.
+ * @param constantVisitor the <code>ConstantVisitor</code> to which visits
+ * will be delegated.
+ */
+ public ConstantTagFilter(int[] constantTags,
+ ConstantVisitor constantVisitor)
+ {
+ int constantTagMask = 0;
+ for (int index = 0; index < constantTags.length; index++)
+ {
+ constantTagMask |= 1 << constantTags[index];
+ }
+
+ this.constantTagMask = constantTagMask;
+ this.constantVisitor = constantVisitor;
+ }
+
+
+ // Implementations for ConstantVisitor.
+
+ public void visitAnyConstant(Clazz clazz, Constant constant)
+ {
+ if (((1 << constant.getTag()) & constantTagMask) != 0)
+ {
+ constant.accept(clazz, constantVisitor);
+ }
+ }
+} \ No newline at end of file