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/*
 * 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;

/**
 * Dataflow fact to represent the depth of the Java operand stack.
 *
 * @see StackDepthAnalysis
 */
public class StackDepth {
    private int depth;

    /**
     * Constructor.
     *
     * @param depth
     *            the stack depth
     */
    public StackDepth(int depth) {
        this.depth = depth;
    }

    /**
     * Get the stack depth.
     */
    public int getDepth() {
        return depth;
    }

    /**
     * Set the stack depth.
     */
    public void setDepth(int depth) {
        this.depth = depth;
    }

    @Override
    public String toString() {
        if (getDepth() == StackDepthAnalysis.TOP) {
            return "[TOP]";
        } else if (getDepth() == StackDepthAnalysis.BOTTOM) {
            return "[BOTTOM]";
        } else {
            return "[" + String.valueOf(depth) + "]";
        }
    }
}