/*
* Copyright (c) 2003 The Visigoth Software Society. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution, if
* any, must include the following acknowledgement:
* "This product includes software developed by the
* Visigoth Software Society (http://www.visigoths.org/)."
* Alternately, this acknowledgement may appear in the software itself,
* if and wherever such third-party acknowledgements normally appear.
*
* 4. Neither the name "FreeMarker", "Visigoth", nor any of the names of the
* project contributors may be used to endorse or promote products derived
* from this software without prior written permission. For written
* permission, please contact [email protected].
*
* 5. Products derived from this software may not be called "FreeMarker" or "Visigoth"
* nor may "FreeMarker" or "Visigoth" appear in their names
* without prior written permission of the Visigoth Software Society.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE VISIGOTH SOFTWARE SOCIETY OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Visigoth Software Society. For more
* information on the Visigoth Software Society, please see
* http://www.visigoths.org/
*/
package freemarker.template;
/**
* List values in a template data model whose elements are accessed by the
* index operator should implement this interface. In addition to
* accessing elements by index and querying size using the <code>?size</code>
* built-in, objects that implement this interface can be iterated in
* <code><#foreach ...></code> and <code><#list ...></code> directives. The
* iteration is implemented by calling the {@link #get(int)} method
* repeatedly starting from zero and going to <tt>{@link #size()} - 1</tt>.
* @author Attila Szegedi, szegedia at users dot sourceforge dot net
* @version $Id: TemplateSequenceModel.java,v 1.10 2004/11/27 14:49:57 ddekany Exp $
*/
public interface TemplateSequenceModel extends TemplateModel {
/**
* Retrieves the i-th template model in this sequence.
*
* @return the item at the specified index, or <code>null</code> if
* the index is out of bounds. Note that a <code>null</code> value is
* interpreted by FreeMarker as "variable does not exist", and accessing
* a missing variables is usually considered as an error in the FreeMarker
* Template Language, so the usage of a bad index will not remain hidden.
*/
TemplateModel get(int index) throws TemplateModelException;
/**
* @return the number of items in the list.
*/
int size() throws TemplateModelException;
}
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