de.knightsoftnet.navigation.rebind.VersionInfoGenerator Maven / Gradle / Ivy

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A view helper classes to generate a dynamic navigation in a gwtp project. The navigation changes when user changes (login/logout). It can highlight the entry of the selected view, even if you use the back button or reload the page.

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/*
 * 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 de.knightsoftnet.navigation.rebind;

import com.google.gwt.core.ext.Generator;
import com.google.gwt.core.ext.GeneratorContext;
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;

import java.io.PrintWriter;
import java.util.ResourceBundle;

/**
 * this class creates a implementation of the VersionInfoInterface with data from maven's pom.xml.
 *
 * @author Manfred Tremmel
 *
 */
public class VersionInfoGenerator extends Generator {
  private String simpleName;

  @Override
  public final String generate(final TreeLogger logger, final GeneratorContext context,
      final String typeName) throws UnableToCompleteException {
    try {
      final JClassType classType = context.getTypeOracle().getType(typeName);

      // Here you would retrieve the metadata based on typeName for this class
      final SourceWriter src = getSourceWriter(classType, context, logger);

      if (src != null) {
        final ResourceBundle bundle = ResourceBundle.getBundle("Version");
        final String version = bundle.getString("application.version");
        final String buildTimeString = bundle.getString("build.timestamp");
        final String copyright = bundle.getString("application.copyright");
        final String author = bundle.getString("application.author");

        src.println("public " + simpleName + "() {");
        src.println("  super();");
        src.println("  setCopyrightText(\"" + copyright + "\");");
        src.println("  setVersionNumber(\"" + version + "\");");
        src.println("  setVersionDate(\"" + buildTimeString + "\");");
        src.println("  setAuthor(\"" + author + "\");");
        src.println("}");

        src.commit(logger);

        System.out.println("Generating for: " + typeName);
      }
      return typeName + "Generated";
    } catch (final NotFoundException e) {
      e.printStackTrace();
    }
    return null;
  }

  /**
   * get source writer for the generator.
   *
   * @param classType class type
   * @param context generator context
   * @param logger tree logger
   * @return SourceWriter to write the generated sources to
   */
  public final SourceWriter getSourceWriter(final JClassType classType,
      final GeneratorContext context, final TreeLogger logger) {
    final String packageName = classType.getPackage().getName();
    simpleName = classType.getSimpleSourceName() + "Generated";
    final ClassSourceFileComposerFactory composer =
        new ClassSourceFileComposerFactory(packageName, simpleName);
    composer.setSuperclass(classType.getName());

    final PrintWriter printWriter = context.tryCreate(logger, packageName, simpleName);
    if (printWriter == null) {
      return null;
    }
    return composer.createSourceWriter(context, printWriter);
  }
}