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Diffstat (limited to 'src/proguard/classfile/visitor/ClassVersionSetter.java')
-rw-r--r-- | src/proguard/classfile/visitor/ClassVersionSetter.java | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/src/proguard/classfile/visitor/ClassVersionSetter.java b/src/proguard/classfile/visitor/ClassVersionSetter.java new file mode 100644 index 0000000..34dfbc1 --- /dev/null +++ b/src/proguard/classfile/visitor/ClassVersionSetter.java @@ -0,0 +1,83 @@ +/* + * 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 java.util.Set; + +/** + * This <code>ClassVisitor</code> sets the version number of the program classes + * that it visits. + * + * @author Eric Lafortune + */ +public class ClassVersionSetter implements ClassVisitor +{ + private final int classVersion; + + private final Set newerClassVersions; + + + /** + * Creates a new ClassVersionSetter. + * @param classVersion the class version number. + */ + public ClassVersionSetter(int classVersion) + { + this(classVersion, null); + } + + + /** + * Creates a new ClassVersionSetter that also stores any newer class version + * numbers that it encounters while visiting program classes. + * @param classVersion the class version number. + * @param newerClassVersions the <code>Set</code> in which newer class + * version numbers can be collected. + */ + public ClassVersionSetter(int classVersion, + Set newerClassVersions) + { + this.classVersion = classVersion; + this.newerClassVersions = newerClassVersions; + } + + + // Implementations for ClassVisitor. + + public void visitProgramClass(ProgramClass programClass) + { + if (programClass.u4version > classVersion && + newerClassVersions != null) + { + newerClassVersions.add(new Integer(programClass.u4version)); + } + + programClass.u4version = classVersion; + } + + + public void visitLibraryClass(LibraryClass libraryClass) + { + // Library classes don't have version numbers. + } +} |