RELEASE_2_1_13/src/blocks/poi/java/org/apache/cocoon/components/elementprocessor/impl/poi/hssf/elements/EP_VCenter.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.cocoon.components.elementprocessor.impl.poi.hssf.elements;

import org.apache.cocoon.components.elementprocessor.types.BooleanConverter;
import org.apache.cocoon.components.elementprocessor.types.BooleanResult;

import java.io.IOException;

/**
 * No-op implementation of ElementProcessor to handle the "vcenter"
 * tag
 *
 * This element has a single attribute, value, which is boolean.
 *
 * @author Marc Johnson (marc_johnson27591@hotmail.com)
 * @version CVS $Id$
 */
public class EP_VCenter extends BaseElementProcessor {
    private static final String _value_attribute = "value";
    private BooleanResult       _value;

    /**
     * constructor
     */
    public EP_VCenter() {
        super(null);
        _value = null;
    }

    /**
     * @return value
     *
     * @exception IOException if the value is malformed or missing
     */
    public boolean getValue() throws IOException {
        if (_value == null) {
            _value = BooleanConverter.extractBoolean(this.getValue(_value_attribute));
        }
        return _value.booleanValue();
    }
    
    /**
     * Setup whether or not the worksheet content is centered (vertically)
     * on the page when it is printed
     * @exception IOException
     */
    public void endProcessing() throws IOException{
        this.getSheet().setVCenter(this.getValue());
    }
}   // end public class EP_VCenter