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.visitor;
021    
022    import org.sonar.java.bytecode.asm.AsmClass;
023    import org.sonar.java.bytecode.asm.AsmMethod;
024    import org.sonar.squid.indexer.SquidIndex;
025    
026    public class AccessorVisitor extends BytecodeVisitor {
027    
028      private AsmClass asmClass;
029    
030      public AccessorVisitor(SquidIndex index) {
031        super(index);
032      }
033    
034      public void visitClass(AsmClass asmClass) {
035        this.asmClass = asmClass;
036      }
037    
038      public void visitMethod(AsmMethod asmMethod) {
039        String propertyName = extractPropertyNameFromMethodName(asmMethod);
040        if (propertyName != null && asmClass.getField(propertyName) != null) {
041          asmMethod.setAccessor(true);
042        }
043      }
044    
045      private String extractPropertyNameFromMethodName(AsmMethod asmMethod) {
046        String propertyName;
047        String methodName = asmMethod.getName();
048        if (methodName.length() > 3 && (methodName.startsWith("get") || methodName.startsWith("set"))) {
049          propertyName = methodName.substring(3);
050        } else if (methodName.length() > 2 && methodName.startsWith("is")) {
051          propertyName = methodName.substring(2);
052        } else {
053          return null;
054        }
055        byte[] bytes = propertyName.getBytes();
056        bytes[0] = (byte) Character.toLowerCase((char) bytes[0]);
057        return new String(bytes);
058      }
059    }