com.sencha.gxt.state.rebind.StateManagerGenerator Maven / Gradle / Ivy

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/**
 * Sencha GXT 3.0.0 - Sencha for GWT
 * Copyright(c) 2007-2012, Sencha, Inc.
 * [email protected]
 *
 * http://www.sencha.com/products/gxt/license/
 */
package com.sencha.gxt.state.rebind;

import java.io.PrintWriter;

import com.google.gwt.core.client.GWT;
import com.google.gwt.core.ext.BadPropertyValueException;
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.TreeLogger.Type;
import com.google.gwt.core.ext.UnableToCompleteException;
import com.google.gwt.core.ext.typeinfo.JClassType;
import com.google.gwt.core.ext.typeinfo.TypeOracle;
import com.google.gwt.dev.util.Name;
import com.google.gwt.user.rebind.ClassSourceFileComposerFactory;
import com.google.gwt.user.rebind.SourceWriter;
import com.sencha.gxt.state.client.StateManager;

public class StateManagerGenerator extends Generator {
  public static final String STATE_MANAGER_ABF = "GXT.state.autoBeanFactory";
  @Override
  public String generate(TreeLogger logger, GeneratorContext context, String typeName) throws UnableToCompleteException {
    TypeOracle oracle = context.getTypeOracle();

    JClassType type = oracle.findType(typeName);
    JClassType stateMangerType = oracle.findType(Name.getSourceNameForClass(StateManager.class));
    if (type == null || type.isClass() == null || !type.isAssignableTo(stateMangerType)) {
      logger.log(Type.ERROR, "This generator only can function on StateManager subtypes");
      throw new UnableToCompleteException();
    }

    String abf;
    try {
      abf = context.getPropertyOracle().getConfigurationProperty(STATE_MANAGER_ABF).getValues().get(0);
    } catch (BadPropertyValueException ex) {
      logger.log(Type.ERROR, "Could not read property for " + STATE_MANAGER_ABF, ex);
      throw new UnableToCompleteException();
    }

    JClassType abfType = oracle.findType(abf);
    if (abfType == null) {
      logger.log(Type.ERROR, "Cannot find type " + abf + " in gwt classpath");
      throw new UnableToCompleteException();
    }

    String packageName = abfType.getPackage().getName();
    String simpleSourceName = "StateManagerImpl_" + abfType.getName().replace('.', '_');
    PrintWriter pw = context.tryCreate(logger, packageName, simpleSourceName);
    if (pw == null) {
      return packageName + "." + simpleSourceName;
    }

    ClassSourceFileComposerFactory factory = new ClassSourceFileComposerFactory(packageName, simpleSourceName);
    factory.setSuperclass(typeName);
    factory.addImport(Name.getSourceNameForClass(GWT.class));

    SourceWriter sw = factory.createSourceWriter(context, pw);

    sw.println("public %1$s getStateBeanFactory() {", abf);
    sw.indentln("return GWT.create(%1$s.class);", abf);
    sw.println("}");

    sw.commit(logger);

    return factory.getCreatedClassName();
  }

}