/*
 * FindBugs - Find bugs in Java programs
 * Copyright (C) 2003-2005 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 java.util.HashSet;

import edu.umd.cs.findbugs.BugReporter;
import edu.umd.cs.findbugs.BytecodeScanningDetector;
import edu.umd.cs.findbugs.Detector;
import edu.umd.cs.findbugs.NonReportingDetector;
import edu.umd.cs.findbugs.ba.AnalysisContext;
import edu.umd.cs.findbugs.ba.XClass;
import edu.umd.cs.findbugs.ba.XFactory;
import edu.umd.cs.findbugs.ba.XMethod;
import edu.umd.cs.findbugs.ba.ch.Subtypes2;
import edu.umd.cs.findbugs.classfile.ClassDescriptor;
import edu.umd.cs.findbugs.classfile.DescriptorFactory;
import edu.umd.cs.findbugs.internalAnnotations.SlashedClassName;
import edu.umd.cs.findbugs.util.ClassName;

/**
 * Detector to find private methods that are never called.
 */
public class ReflectiveClasses extends BytecodeScanningDetector implements Detector, NonReportingDetector {

	XFactory xFactory = AnalysisContext.currentXFactory();
	public ReflectiveClasses(BugReporter bugReporter) {

	}

	String constantString;
	@Override
	public void sawString(String s) {
		constantString = s;
	}
	public void sawClass() {
		if (getOpcode() == LDC) process(getClassConstantOperand());
	}
	@Override
	public void sawOpcode(int seen) {
		if (seen == INVOKESTATIC) {
			// System.out.println(getClassConstantOperand()+ "." + getNameConstantOperand());
			if (getClassConstantOperand().equals("java/lang/Class") && getNameConstantOperand().equals("forName")) {
				process(ClassName.toSlashedClassName(constantString));
		}
			
		}
		constantString = null;
	}

	private void process(@SlashedClassName String className) {
		ClassDescriptor d = DescriptorFactory.createClassDescriptor(className);
		AnalysisContext.currentXFactory().addReflectiveClasses(d);
	}
}

//vim:ts=4

/*
 * FindBugs - Find bugs in Java programs
 * Copyright (C) 2003-2005 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 edu.umd.cs.findbugs.BugReporter;
import edu.umd.cs.findbugs.BytecodeScanningDetector;
import edu.umd.cs.findbugs.Detector;
import edu.umd.cs.findbugs.NonReportingDetector;
import edu.umd.cs.findbugs.annotations.CheckForNull;
import edu.umd.cs.findbugs.ba.AnalysisContext;
import edu.umd.cs.findbugs.ba.XFactory;
import edu.umd.cs.findbugs.classfile.ClassDescriptor;
import edu.umd.cs.findbugs.classfile.DescriptorFactory;
import edu.umd.cs.findbugs.internalAnnotations.SlashedClassName;
import edu.umd.cs.findbugs.util.ClassName;

/**
 * Detector to find private methods that are never called.
 */
public class ReflectiveClasses extends BytecodeScanningDetector implements Detector, NonReportingDetector {

	XFactory xFactory = AnalysisContext.currentXFactory();
	public ReflectiveClasses(BugReporter bugReporter) {

	}

	@CheckForNull String constantString;
	@Override
	public void sawString(String s) {
		constantString = s;
	}
	public void sawClass() {
		if (getOpcode() == LDC) process(getClassConstantOperand());
	}
	@Override
	public void sawOpcode(int seen) {
		if (seen == INVOKESTATIC) {
			// System.out.println(getClassConstantOperand()+ "." + getNameConstantOperand());
			if (constantString != null && getClassConstantOperand().equals("java/lang/Class") && getNameConstantOperand().equals("forName")) {
				process(ClassName.toSlashedClassName(constantString));
		}
			
		}
		constantString = null;
	}

	private void process(@SlashedClassName String className) {
		ClassDescriptor d = DescriptorFactory.createClassDescriptor(className);
		AnalysisContext.currentXFactory().addReflectiveClasses(d);
	}
}

//vim:ts=4

fix null pointer bug