com.googlecode.mgwt.ui.generator.SuperDevModeGenerator.java Source code

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Here is the source code for com.googlecode.mgwt.ui.generator.SuperDevModeGenerator.java

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/*
 * Copyright 2012 Daniel Kurka
 *
 * 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 com.googlecode.mgwt.ui.generator;

import java.io.PrintWriter;

import com.google.gwt.core.ext.BadPropertyValueException;
import com.google.gwt.core.ext.ConfigurationProperty;
import com.google.gwt.core.ext.Generator;
import com.google.gwt.core.ext.GeneratorContext;
import com.google.gwt.core.ext.PropertyOracle;
import com.google.gwt.core.ext.TreeLogger;
import com.google.gwt.core.ext.UnableToCompleteException;
import com.google.gwt.core.ext.typeinfo.JClassType;
import com.google.gwt.core.ext.typeinfo.NotFoundException;
import com.google.gwt.user.rebind.ClassSourceFileComposerFactory;
import com.google.gwt.user.rebind.SourceWriter;

public class SuperDevModeGenerator extends Generator {

    @Override
    public String generate(TreeLogger logger, GeneratorContext context, String typeName)
            throws UnableToCompleteException {
        // get the property oracle
        PropertyOracle propertyOracle = context.getPropertyOracle();
        ConfigurationProperty property = null;
        try {
            // get mgwt.superdevmode variable
            property = propertyOracle.getConfigurationProperty("mgwt.superdevmode");
        } catch (BadPropertyValueException e) {
            // if we can`t find it die
            logger.log(TreeLogger.ERROR, "can not resolve mgwt.superdevmode variable", e);
            throw new UnableToCompleteException();
        }

        ConfigurationProperty superDevModeServer = null;
        try {
            // get mgwt.superdevmode variable
            superDevModeServer = propertyOracle.getConfigurationProperty("mgwt.superdevmode_host");
        } catch (BadPropertyValueException e) {
            // if we can`t find it die
            logger.log(TreeLogger.INFO,
                    "can not resolve mgwt.superdevmode_host variable - using default - http://<server>:9876", e);
        }

        JClassType classType = null;

        try {
            // get the type we are looking for
            classType = context.getTypeOracle().getType(typeName);
        } catch (NotFoundException e) {
            // if we can`t get it die
            logger.log(TreeLogger.ERROR, "can not find type: '" + typeName + "'", e);
            throw new UnableToCompleteException();
        }

        // get value of mgwt.os
        String mgwtSuperDevmodePropertyValue = property.getValues().get(0);

        if ("on".equals(mgwtSuperDevmodePropertyValue)) {
            return buildOnImplementation(logger, context, classType, typeName, superDevModeServer);
        } else {
            return "com.googlecode.mgwt.ui.client.util.impl.SuperDevModeOffImpl";
        }

    }

    private String buildOnImplementation(TreeLogger logger, GeneratorContext context, JClassType classType,
            String typeName, ConfigurationProperty superDevModeServer) {

        if (superDevModeServer.getValues().get(0) == null) {
            //use default impl!
            return "com.googlecode.mgwt.ui.client.util.impl.SuperDevModeHelperOnDefaultImpl";
        }

        // get the package name
        String packageName = classType.getPackage().getName();
        // build name for implementation class
        String simpleName = classType.getSimpleSourceName() + "_generated";
        // combine package name and simple name to full qualified
        String fullName = packageName + "." + simpleName;

        ClassSourceFileComposerFactory composer = new ClassSourceFileComposerFactory(packageName, simpleName);
        composer.setSuperclass("com.googlecode.mgwt.ui.client.util.impl.SuperDevModeHelperOnImpl");
        composer.addImport("com.googlecode.mgwt.ui.client.util.impl.SuperDevModeHelperOnImpl");

        PrintWriter printWriter = context.tryCreate(logger, packageName, simpleName);

        if (printWriter == null) {
            return fullName;
        }

        // start writing the implementation
        SourceWriter writer = composer.createSourceWriter(context, printWriter);

        writer.println("protected String getServerUrl() {");
        writer.println("return \"" + superDevModeServer.getValues().get(0) + "\";");
        writer.println("}");
        writer.commit(logger);

        return fullName;
    }

}