/*
 * Copyright 2002,2004 The Apache Software Foundation.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.commons.jelly.tags.util;

import java.util.ArrayList;
import java.util.List;
import java.util.StringTokenizer;

import org.apache.commons.jelly.JellyTagException;
import org.apache.commons.jelly.MissingAttributeException;
import org.apache.commons.jelly.TagSupport;
import org.apache.commons.jelly.XMLOutput;

public class TokenizeTag extends TagSupport
{
    private String var;
    private String delim;

    public TokenizeTag()
    {
    }


    // Tag interface
    //-------------------------------------------------------------------------

    public void doTag(final XMLOutput output) throws MissingAttributeException, JellyTagException {
        if ( this.var == null )
        {
            throw new MissingAttributeException( "var" );
        }

        if ( this.delim == null )
        {
            throw new MissingAttributeException( "delim" );
        }

        StringTokenizer tokenizer = new StringTokenizer( getBodyText(),
                                                         this.delim );

        List tokens = new ArrayList();

        while ( tokenizer.hasMoreTokens() )
        {
            tokens.add( tokenizer.nextToken() );
        }

        getContext().setVariable( this.var,
                                  tokens );
    }

    /** The variable name to hold the list of tokens */
    public void setVar(String var)
    {
        this.var = var;
    }

    /** the delimiter that separates the tokens */
    public void setDelim(String delim)
    {
        this.delim = delim;
    }

}