org.directwebremoting.servlet.DtoAllHandler 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 2005 Joe Walker
 *
 * 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.servlet;

import org.directwebremoting.extend.NamedConverter;
import org.directwebremoting.util.LocalUtil;

/**
 * A handler for dtoall generation requests
 * @author Mike Wilson [mikewse at hotmail dot com]
 */
public class DtoAllHandler extends BaseDtoAllHandler
{
    /**
     * Generates the full dtoall script by decorating the DTO classes returned by the Remoter.
     * @return string containing dtoall script
     */
    @Override
    public String generateDtoAllScript(String contextPath, String servletPath)
    {
        StringBuilder buffer = new StringBuilder();

        buffer
            .append("(function() {\n")
            .append("  var c;\n")
            .append("  var addedNow = [];\n");

        // DTO class definitions
        for (String jsClassName : converterManager.getNamedConverterJavaScriptNames())
        {
            buffer
                .append("\n")
                .append("  if (!dwr.engine._mappedClasses[\"" + jsClassName + "\"]) {\n")
                .append(remoter.generateDtoJavaScript(jsClassName, "    ", "c"))
                .append("    dwr.engine._setObject(\"" + jsClassName + "\", c);\n")
                .append("    dwr.engine._mappedClasses[\"" + jsClassName + "\"] = c;\n")
                .append("    addedNow[\"" + jsClassName + "\"] = true;\n")
                .append("  }\n");
        }

        // DTO superclass definitions
        for (String jsClassName : converterManager.getNamedConverterJavaScriptNames())
        {
            NamedConverter namedConv = converterManager.getNamedConverter(jsClassName);
            String jsSuperClassName = namedConv.getJavascriptSuperClass();
            if (LocalUtil.hasLength(jsSuperClassName))
            {
                String classExpression = "dwr.engine._mappedClasses[\"" + jsClassName + "\"]";
                String superClassExpression = "dwr.engine._mappedClasses[\"" + jsSuperClassName + "\"]";
                buffer
                    .append("\n")
                    .append("  if (addedNow[\"" + jsClassName + "\"]) {\n")
                    .append(remoter.generateDtoInheritanceJavaScript("    ", classExpression, superClassExpression, "dwr.engine._delegate"))
                    .append("  }\n");
            }
        }

        buffer.append("})();\n");

        return buffer.toString();
    }
}