/*
* FindBugs - Find bugs in Java programs
* Copyright (C) 2004,2005 Dave Brosius <dbrosius@users.sourceforge.net>
* Copyright (C) 2004,2005 University of Maryland
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package edu.umd.cs.findbugs.detect;
import org.apache.bcel.classfile.JavaClass;
import edu.umd.cs.findbugs.BugInstance;
import edu.umd.cs.findbugs.BugReporter;
import edu.umd.cs.findbugs.OpcodeStack;
import edu.umd.cs.findbugs.StatelessDetector;
import edu.umd.cs.findbugs.ba.AnalysisContext;
import edu.umd.cs.findbugs.bcel.OpcodeStackDetector;
public class UseObjectEquals extends OpcodeStackDetector implements StatelessDetector {
private BugReporter bugReporter;
public UseObjectEquals(BugReporter bugReporter) {
this.bugReporter = bugReporter;
}
@Override
public void sawOpcode(int seen) {
if ((seen == INVOKEVIRTUAL)
&& getNameConstantOperand().equals("equals")
&& getSigConstantOperand().equals("(Ljava/lang/Object;)Z")) {
if (stack.getStackDepth() > 1) {
OpcodeStack.Item item1 = stack.getStackItem(1);
try {
JavaClass cls = item1.getJavaClass();
if ((cls != null) && cls.isFinal()) {
if (item1.getSignature().equals("Ljava/lang/Class;"))
return;
String methodClassName = getClassConstantOperand();
if (methodClassName.equals("java/lang/Object")) {
if (!AnalysisContext.currentAnalysisContext().isApplicationClass(cls))
return;
bugReporter.reportBug(new BugInstance(this, "UOE_USE_OBJECT_EQUALS", LOW_PRIORITY)
.addClassAndMethod(this)
.addSourceLine(this));
}
}
} catch (ClassNotFoundException cnfe) {
//cnfe.printStackTrace();
bugReporter.reportMissingClass(cnfe);
}
}
}
}
}
// vim:ts=4