com.google.gwt.inject.rebind.GinjectorGenerator Maven / Gradle / Ivy

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GIN (GWT INjection) brings automatic dependency injection to Google Web Toolkit client-side code. GIN is built on top of Guice and uses (a subset of) Guice's binding language.

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/*
 * Copyright 2008 Google Inc.
 *
 * 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.google.gwt.inject.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.inject.Guice;
import com.google.inject.Module;
import com.google.inject.Stage;

/**
 * Generator for implementations of {@link com.google.gwt.inject.client.Ginjector}.
 */
public class GinjectorGenerator extends Generator {

  public String generate(TreeLogger logger, GeneratorContext ctx, String requestedClass)
      throws UnableToCompleteException {

    JClassType ginjectorInterface = ctx.getTypeOracle().findType(requestedClass);

    if (ginjectorInterface == null) {
      logger.log(TreeLogger.ERROR, "Unable to find metadata for type '"
          + requestedClass + "'", null);

      throw new UnableToCompleteException();
    }

    // This is the Injector we use for the Generator internally,
    // it has nothing to do with user code.
    Module module = new GinjectorGeneratorModule(logger, ctx, ginjectorInterface);
    return Guice.createInjector(Stage.PRODUCTION, module).getInstance(GinjectorGeneratorImpl.class)
        .generate();
  }
}