resourcevalueframe.java

一个查找java程序里bug的程序的源代码,该程序本身也是java写的,对提高java编程水平很有用

/*
 * 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;

public class ResourceValueFrame extends Frame<ResourceValue> {
	/**
	 * The resource escapes the method.
	 */
	public static final int ESCAPED = 0;

	/**
	 * The resource is open (or locked, etc) on paths that include only normal control flow.
	 */
	public static final int OPEN = 1;

	/**
	 * The resource is open (or locked, etc) on paths that include exception control flow.
	 */
	public static final int OPEN_ON_EXCEPTION_PATH = 2;

	/**
	 * The resource is closed (or unlocked, etc).
	 */
	public static final int CLOSED = 3;

	/**
	 * The resource has been created, but is not open.
	 */
	public static final int CREATED = 4;

	/**
	 * The resource doesn't exist.
	 */
	public static final int NONEXISTENT = 5;

	private int status;

	public ResourceValueFrame(int numSlots) {
		super(numSlots);
		this.status = NONEXISTENT;
	}

	public int getStatus() {
		return status;
	}

	public void setStatus(int status) {
		this.status = status;
	}

	public boolean sameAs(Frame<ResourceValue> other_) {
		if (!super.sameAs(other_))
			return false;

		ResourceValueFrame other = (ResourceValueFrame) other_;
		return this.status == other.status;
	}

	public void copyFrom(Frame<ResourceValue> other_) {
		super.copyFrom(other_);
		ResourceValueFrame other = (ResourceValueFrame) other_;
		this.status = other.status;
	}

	private static final String[] statusList = {"(escaped)", "(open)", "(open_exception)", "(closed)", "(created)", "(nonexistent)"};

	public String toString() {
		return super.toString() + statusList[status];
	}

}

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