001    /*
002     * Sonar, open source software quality management tool.
003     * Copyright (C) 2009 SonarSource SA
004     * mailto:contact AT sonarsource DOT com
005     *
006     * Sonar is free software; you can redistribute it and/or
007     * modify it under the terms of the GNU Lesser General Public
008     * License as published by the Free Software Foundation; either
009     * version 3 of the License, or (at your option) any later version.
010     *
011     * Sonar is distributed in the hope that it will be useful,
012     * but WITHOUT ANY WARRANTY; without even the implied warranty of
013     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014     * Lesser General Public License for more details.
015     *
016     * You should have received a copy of the GNU Lesser General Public
017     * License along with Sonar; if not, write to the Free Software
018     * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02
019     */
020    package org.sonar.java.bytecode.asm;
021    
022    import java.io.File;
023    import java.io.FileInputStream;
024    import java.io.FileNotFoundException;
025    import java.io.IOException;
026    import java.io.InputStream;
027    
028    import org.apache.commons.io.IOUtils;
029    import org.objectweb.asm.ClassReader;
030    import org.sonar.squid.api.AnalysisException;
031    
032    public class AsmClassReader {
033    
034      public AsmClass readClass(InputStream reader) {
035        try {
036          AsmClassVisitor classVisitor = new AsmClassVisitor();
037          ClassReader asmReader = new ClassReader(reader);
038          asmReader.accept(classVisitor, 0);
039          return classVisitor.getAsmClass();
040        } catch (IOException e) {
041          throw new AnalysisException("Unable to read bytecode", e);
042        }
043      }
044    
045      public AsmClass readClass(String className) {
046        return readClass(ClassLoader.getSystemResourceAsStream(className));
047      }
048    
049      public AsmClass readClass(File file) {
050        FileInputStream input = null;
051        try {
052          input = new FileInputStream(file);
053          return readClass(input);
054          
055        } catch (FileNotFoundException e) {
056          throw new AnalysisException("Unable to read file : " + file.getAbsolutePath(), e);
057    
058        } finally {
059          IOUtils.closeQuietly(input);
060        }
061      }
062    }