net.sf.excelutils.webwork.OgnlDynaBean.java Source code

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Here is the source code for net.sf.excelutils.webwork.OgnlDynaBean.java

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/*
 * Copyright 2003-2005 ExcelUtils http://excelutils.sourceforge.net
 * Created on 2005-7-11
 * 
 * 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 net.sf.excelutils.webwork;

import java.lang.reflect.Array;
import java.util.List;
import java.util.Map;

import org.apache.commons.beanutils.LazyDynaBean;

import com.opensymphony.xwork.util.OgnlValueStack;

/**
 * <p>
 * <b>OnglDynaBean</b> is a class which extends LazyDynaBean
 * </p>
 * @deprecated
 * @author rainsoft
 * @version $Revision: 123 $ $Date: 2006-09-17 15:03:24 +0800 (, 17 ? 2006) $
 */
@SuppressWarnings("unchecked")
public class OgnlDynaBean extends LazyDynaBean {
    // ~ Instance fields ////////////////////////////////////////////////////////

    private static final long serialVersionUID = 1L;

    /**
     * valueStack reference
     */
    OgnlValueStack valueStack;

    // ~ Constructors ///////////////////////////////////////////////////////////

    /**
     * Constructs an instance of OgnlValueStackShadowMap.
     * 
     * @param valueStack -
     *          the underlying valuestack
     */
    public OgnlDynaBean(OgnlValueStack valueStack) {
        super(new OgnlDynaClass(valueStack));
        this.valueStack = valueStack;
    }

    // ~ Methods ////////////////////////////////////////////////////////////////

    /**
     * Implementation of get(), overriding LazyDynaBean implementation.
     * 
     * @param key -
     *          The key to get in DynaBean and if not found there from the
     *          valueStack.
     * @return value - The object from DynaBean or if null, from the valueStack.
     */
    public Object get(String key) {
        Object value = super.get(key);
        if (value != null) {
            if (value instanceof Map) {
                if (((Map) value).size() <= 0) {
                    value = null;
                }
            }

            if (value instanceof List) {
                if (((List) value).size() <= 0) {
                    value = null;
                }
            }
        }
        if ((value == null) && key != null) {
            value = valueStack.findValue(key);
        }

        return value;
    }

    public Object get(String name, String key) {
        Object value = super.get(name, key);
        if (value == null) {
            Object map = valueStack.findValue(name);
            if (map instanceof Map) {
                value = ((Map) map).get(key);
            }
        }
        return value;
    }

    public Object get(String name, int index) {
        Object value = super.get(name, index);
        if (value == null) {
            Object array = valueStack.findValue(name);
            if (array.getClass().isArray()) {
                return Array.get(array, index);
            } else if (array instanceof List) {
                return ((List) array).get(index);
            }
        }
        return value;
    }
}