/*******************************************************************************
 * Copyright (c) 2000, 2004 International Business Machines Corp. and others.
 * All rights reserved. This program and the accompanying materials 
 * are made available under the terms of the Common Public License v1.0 
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/cpl-v10.html
 * 
 * Contributors:
 *     IBM Corporation - initial API and implementation
 ******************************************************************************/
package net.sourceforge.phpdt.internal.formatter.align;

/**
 * Exception used to backtrack and break available alignments When the exception
 * is thrown, it is assumed that some alignment will be changed.
 * 
 * @since 2.1
 */
public class AlignmentException extends RuntimeException {

	public static final int LINE_TOO_LONG = 1;

	public static final int ALIGN_TOO_SMALL = 2;

	int reason;

	int value;

	public int relativeDepth;

	public AlignmentException(int reason, int relativeDepth) {
		this(reason, 0, relativeDepth);
	}

	public AlignmentException(int reason, int value, int relativeDepth) {
		this.reason = reason;
		this.value = value;
		this.relativeDepth = relativeDepth;
	}

	public String toString() {
		StringBuffer buffer = new StringBuffer(10);
		switch (this.reason) {
		case LINE_TOO_LONG:
			buffer.append("LINE_TOO_LONG"); //$NON-NLS-1$
			break;
		case ALIGN_TOO_SMALL:
			buffer.append("ALIGN_TOO_SMALL"); //$NON-NLS-1$
			break;
		}
		buffer.append("<relativeDepth: ") //$NON-NLS-1$
				.append(this.relativeDepth).append(">\n"); //$NON-NLS-1$
		return buffer.toString();
	}
}
