core/src/main/java/org/apache/commons/jelly/tags/core/ChooseTag.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.core;

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

/** A tag which conditionally evaluates its body based on some condition
  *
  * @author <a href="mailto:jstrachan@apache.org">James Strachan</a>
  * @version $Revision$
  */
public class ChooseTag extends TagSupport {

    private boolean blockEvaluated;

    public ChooseTag() {
    }

    // Tag interface
    //-------------------------------------------------------------------------
    public void doTag(XMLOutput output) throws JellyTagException {
        setBlockEvaluated(false);
        invokeBody(output);
    }

    protected boolean isBlockEvaluated() {
        return blockEvaluated;
    }

    protected void setBlockEvaluated(boolean blockEvaluated) {
        this.blockEvaluated = blockEvaluated;
    }
}