/*
* FindBugs - Find Bugs in Java programs
* Copyright (C) 2006, 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 static org.apache.bcel.Constants.*;
import org.objectweb.asm.FieldVisitor;
import org.objectweb.asm.MethodVisitor;
import org.objectweb.asm.Opcodes;
import edu.umd.cs.findbugs.BugInstance;
import edu.umd.cs.findbugs.BugReporter;
import edu.umd.cs.findbugs.MethodAnnotation;
import edu.umd.cs.findbugs.Priorities;
import edu.umd.cs.findbugs.asm.AbstractFBMethodVisitor;
import edu.umd.cs.findbugs.asm.ClassNodeDetector;
/**
* Sample detector, using ASM
*
* @author David Hovemeyer
*/
public class TestASM extends ClassNodeDetector {
public TestASM(BugReporter bugReporter) {
super(bugReporter);
}
@Override
public MethodVisitor visitMethod(final int access, final String name, final String desc, final String signature,
final String[] exceptions) {
if (Character.isUpperCase(name.charAt(0))) {
BugInstance bug0 = new BugInstance(this, "NM_METHOD_NAMING_CONVENTION", NORMAL_PRIORITY).addClass(this).addMethod(
this.name, name, desc, access);
bugReporter.reportBug(bug0);
}
return new AbstractFBMethodVisitor() {
int prevOpcode;
int prevPC;
@Override
public void visitInsn(int opcode) {
prevOpcode = opcode;
prevPC = getPC();
}
@Override
public void visitMethodInsn(int opcode, String owner, String invokedName, String invokedDesc, boolean itf) {
if (prevPC + 1 == getPC() && prevOpcode == I2D && opcode == INVOKESTATIC && owner.equals("java/lang/Math")
&& invokedName.equals("ceil") && invokedDesc.equals("(D)D")) {
BugInstance bug0 = new BugInstance(TestASM.this, "ICAST_INT_CAST_TO_DOUBLE_PASSED_TO_CEIL", NORMAL_PRIORITY);
MethodAnnotation methodAnnotation = MethodAnnotation.fromForeignMethod(TestASM.this.name, name, desc, access);
bug0.addClass(TestASM.this).addMethod(methodAnnotation);
bugReporter.reportBug(bug0);
}
}
};
}
@Override
public FieldVisitor visitField(int access, String name, String desc, String signature, Object value) {
if ((access & Opcodes.ACC_STATIC) != 0 && (access & Opcodes.ACC_FINAL) != 0 && (access & Opcodes.ACC_PUBLIC) != 0
&& !name.equals(name.toUpperCase())) {
bugReporter.reportBug(new BugInstance(this, "NM_FIELD_NAMING_CONVENTION", Priorities.LOW_PRIORITY).addClass(this)
.addField(this.name, name, desc, access));
}
return null;
}
}