/*
 * Bytecode Analysis Framework
 * Copyright (C) 2003,2004 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.ba;

import java.io.IOException;
import java.io.InputStream;

import org.apache.bcel.Repository;
import org.apache.bcel.classfile.ClassParser;
import org.apache.bcel.classfile.JavaClass;

/**
 * A special version of ClassParser that automatically enters
 * parsed classes into the Repository.  This allows us to
 * use the Repository to inspect the class hierarchy, based on
 * the current class path.
 */
public class RepositoryClassParser {
	private ClassParser classParser;

	/**
	 * Constructor.
	 *
	 * @param inputStream the input stream from which to read the class file
	 * @param fileName    filename of the class file
	 */
	public RepositoryClassParser(InputStream inputStream, String fileName) {
		classParser = new ClassParser(inputStream, fileName);
	}

	/**
	 * Constructor.
	 *
	 * @param fileName name of the class file
	 * @throws IOException if the file cannot be read
	 */
	public RepositoryClassParser(String fileName) throws IOException {
		classParser = new ClassParser(fileName);
	}

	/**
	 * Constructor.
	 *
	 * @param zipFile  name of a zip file containing the class
	 * @param fileName name of the zip entry within the class
	 * @throws IOException if the zip entry cannot be read
	 */
	public RepositoryClassParser(String zipFile, String fileName) throws IOException {
		classParser = new ClassParser(zipFile, fileName);
	}

	/**
	 * Parse the class file into a JavaClass object.
	 * If succesful, the new JavaClass is entered into the Repository.
	 *
	 * @return the parsed JavaClass
	 * @throws IOException if the class cannot be parsed
	 */
	public JavaClass parse() throws IOException {
		JavaClass jclass = classParser.parse();
		Repository.addClass(jclass);
		return jclass;
	}
}

// vim:ts=4
