/*
* This library is part of OpenCms -
* the Open Source Content Management System
*
* Copyright (c) Alkacon Software GmbH (http://www.alkacon.com)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* For further information about Alkacon Software, please see the
* company website: http://www.alkacon.com
*
* For further information about OpenCms, please see the
* project website: http://www.opencms.org
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package org.opencms.gwt.rebind;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.List;
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.JMethod;
import com.google.gwt.core.ext.typeinfo.JType;
import com.google.gwt.core.ext.typeinfo.NotFoundException;
import com.google.gwt.core.ext.typeinfo.TypeOracle;
import com.google.gwt.user.rebind.ClassSourceFileComposerFactory;
import com.google.gwt.user.rebind.SourceWriter;
/**
* This generator class generates a class with a method which calls all static initClass()
* methods of classes that implement the {@link org.opencms.gwt.client.I_CmsHasInit} marker interface.<p>
*
* @since 8.0.0
*/
public class CmsClassInitGenerator extends Generator {
/** The name of the class to generate. */
private static final String CLASS_NAME = "CmsClassInitializerImpl";
/** The name of the interface passed into GWT.create(). */
private static final String INIT_INTERFACE_NAME = "org.opencms.gwt.client.I_CmsClassInitializer";
/** The name of the marker interface for the generator. */
private static final String MARKER_INTERFACE_NAME = "org.opencms.gwt.client.I_CmsHasInit";
/** The package of the class to generate. */
private static final String PACKAGE_NAME = "org.opencms.gwt.client";
/**
* @see com.google.gwt.core.ext.Generator#generate(com.google.gwt.core.ext.TreeLogger, com.google.gwt.core.ext.GeneratorContext, java.lang.String)
*/
@Override
public String generate(TreeLogger logger, GeneratorContext context, String typeName)
throws UnableToCompleteException {
TypeOracle oracle = context.getTypeOracle();
JClassType initClass = oracle.findType(MARKER_INTERFACE_NAME);
List<JClassType> initTypes = new ArrayList<JClassType>();
for (JClassType subtype : initClass.getSubtypes()) {
try {
JMethod method = subtype.getMethod("initClass", new JType[] {});
if (!method.isStatic()) {
throw new NotFoundException();
}
initTypes.add(subtype);
} catch (NotFoundException e) {
logger.log(TreeLogger.ERROR, "Could not find initClass() method in class "
+ subtype.getQualifiedSourceName());
throw new UnableToCompleteException();
}
}
generateClass(logger, context, initTypes);
return PACKAGE_NAME + "." + CLASS_NAME;
}
/**
* This method generates the source code for the class initializer class.<p>
*
* @param logger the logger to be used
* @param context the generator context
* @param subclasses the classes for which the generated code should the initClass() method
*/
public void generateClass(TreeLogger logger, GeneratorContext context, List<JClassType> subclasses) {
PrintWriter printWriter = context.tryCreate(logger, PACKAGE_NAME, CLASS_NAME);
if (printWriter == null) {
return;
}
ClassSourceFileComposerFactory composer = new ClassSourceFileComposerFactory(PACKAGE_NAME, CLASS_NAME);
composer.addImplementedInterface(INIT_INTERFACE_NAME);
SourceWriter sourceWriter = composer.createSourceWriter(context, printWriter);
sourceWriter.println("public void initClasses() {");
sourceWriter.indent();
for (JClassType type : subclasses) {
sourceWriter.println(type.getQualifiedSourceName() + ".initClass();");
}
sourceWriter.outdent();
sourceWriter.println("}");
sourceWriter.outdent();
sourceWriter.println("}");
context.commit(logger, printWriter);
}
}