org.directwebremoting.spring.namespace.ConverterParserHelper Maven / Gradle / Ivy

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DWR is easy Ajax for Java. It makes it simple to call Java code directly from Javascript. It gets rid of almost all the boiler plate code between the web browser and your Java code.

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/*
 * Copyright 2010 original author or authors
 *
 * 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.directwebremoting.spring.namespace;

import java.util.Map;

import org.directwebremoting.spring.ConverterConfig;
import org.springframework.beans.factory.config.BeanDefinition;
import org.springframework.beans.factory.support.BeanDefinitionRegistry;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

/**
 * @author Jose Noheda [[email protected]]
 */
public abstract class ConverterParserHelper extends FilterParserHelper
{

    /**
     * Get a list of the defined Converters.
     *
     * @param registry a non null instance
     * @return any
     */
    @SuppressWarnings("unchecked")
    public static Map lookupConverters(BeanDefinitionRegistry registry)
    {
        BeanDefinition config = ConfigurationParser.registerConfigurationIfNecessary(registry);
        return (Map) config.getPropertyValues().getPropertyValue("converters").getValue();
    }

    protected void parseConverterSettings(ConverterConfig converterConfig, Element parent)
    {
        NodeList children = parent.getChildNodes();
        for (int i = 0; i < children.getLength(); i++)
        {
            Node node = children.item(i);
            if (node instanceof Element)
            {
                Element child = (Element) node;
                if (INCLUDE.equals(child.getNodeName()))
                {
                    converterConfig.addInclude(child.getAttribute("method"));
                }
                else if (EXCLUDE.equals(child.getNodeName()))
                {
                    converterConfig.addExclude(child.getAttribute("method"));
                }
                else if (PARAMETER.equals(node.getNodeName()))
                {
                    converterConfig.getParams().put(child.getAttribute("name"), child.getAttribute("value"));
                }
            }
        }
    }

    protected static final String INCLUDE = "dwr:include";
    protected static final String EXCLUDE = "dwr:exclude";
    protected static final String CONVERT = "dwr:convert";
    protected static final String PARAMETER = "dwr:param";

}