/*
 * Copyright (C) 2004-2008  exedio GmbH (www.exedio.com)
 *
 * 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 com.exedio.cope;

/**
 * Signals, that an attempt to write a {@link DataField data field} has been failed,
 * because value to be written violated the length constraint on that field.
 *
 * This exception will be thrown by {@link DataField#set(Item,byte[])} etc.
 * and item constructors.
 *
 * @author Ralf Wiebicke
 */
public final class DataLengthViolationException extends ConstraintViolationException
{
	private static final long serialVersionUID = 1l;
	
	private final DataField feature;
	private final long length;
	private final boolean lengthExact;
	
	/**
	 * Creates a new LengthViolationRuntimeException with the neccessary information about the violation.
	 * @param item initializes, what is returned by {@link #getItem()}.
	 * @param feature initializes, what is returned by {@link #getFeature()}.
	 * @param length initializes, what is returned by {@link #getLength()}.
	 * @param lengthExact initializes, what is returned by {@link #isLengthExact()}.
	 */
	public DataLengthViolationException(final DataField feature, final Item item, final long length, final boolean lengthExact)
	{
		super(item, null);
		
		if(length<feature.getMaximumLength())
			throw new RuntimeException(feature.toString()+'/'+length+'/'+feature.getMaximumLength());
		
		this.feature = feature;
		this.length = length;
		this.lengthExact = lengthExact;
	}
	
	/**
	 * Returns the field, that was attempted to be written.
	 */
	@Override
	public DataField getFeature()
	{
		return feature;
	}

	/**
	 * @deprecated Renamed to {@link #getFeature()}.
	 */
	@Deprecated
	public DataField getDataAttribute()
	{
		return feature;
	}

	/**
	 * Returns the length of the data, that was attempted to be written.
	 * Returns -1, if that length is unknown.
	 * @see #isLengthExact()
	 */
	public long getLength()
	{
		return length;
	}
	
	/**
	 * Returns, whether the value returned by {@link #getLength()}
	 * is the exact length of the data attempted to be written (true)
	 * or just a lower bound of that length (false).
	 */
	public boolean isLengthExact()
	{
		return lengthExact;
	}
	
	@Override
	public String getMessage(final boolean withFeature)
	{
		return
			"length violation on " + getItemID() +
			", " + length + " bytes " +
			(lengthExact ? "" : "or more ") +
			"is too long" + (withFeature ? (" for " + feature) : "");
	}
}

@@ -3079,17 +3079,20 @@
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