com.intrinsarc.backbone.gwt.generators.TerminalGenerator.java Source code

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Here is the source code for com.intrinsarc.backbone.gwt.generators.TerminalGenerator.java

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/*******************************************************************************
 * Copyright 2005-2010, Andrew McVeigh.
 * 
 * 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.intrinsarc.backbone.gwt.generators;

import java.io.*;

import com.google.gwt.core.ext.*;
import com.google.gwt.core.ext.typeinfo.*;
import com.google.gwt.user.rebind.*;

public class TerminalGenerator extends Generator {
    public String generate(TreeLogger logger, GeneratorContext context, String typeName)
            throws UnableToCompleteException {
        try {
            TypeOracle typeOracle = context.getTypeOracle();
            JClassType classType = typeOracle.getType(typeName);
            JParameterizedType parameterizedType = classType.getSuperclass().isParameterized();
            JClassType T = parameterizedType.getTypeArgs()[0];
            String packageName = classType.getPackage().getName();
            String proxyClassName = classType.getSimpleSourceName() + "Dispatcher";
            String qualifiedProxyClassName = packageName + "." + proxyClassName;

            SourceWriter writer = getSourceWriter(logger, context, packageName, proxyClassName);
            if (writer != null) {
                writeToStringMethod(logger, proxyClassName, T, writer);
                writer.commit(logger);
            }
            return qualifiedProxyClassName;
        } catch (NotFoundException e) {
            logger.log(TreeLogger.ERROR, "Class '" + typeName + "' Not Found", e);
            throw new UnableToCompleteException();
        }
    }

    protected SourceWriter getSourceWriter(TreeLogger logger, GeneratorContext context, String packageName,
            String className) {
        PrintWriter printWriter = context.tryCreate(logger, packageName, className);
        if (printWriter == null)
            return null;
        ClassSourceFileComposerFactory composerFactory = new ClassSourceFileComposerFactory(packageName, className);
        composerFactory.addImplementedInterface("com.intrinsarc.backbone.runtime.api.IStateTerminalComponent");
        composerFactory.addImplementedInterface("com.intrinsarc.backbone.runtime.api.ITerminal");
        composerFactory.addImport("com.intrinsarc.backbone.runtime.api.*");
        return composerFactory.createSourceWriter(context, printWriter);
    }

    protected void writeToStringMethod(TreeLogger logger, String proxyClassName, JClassType T,
            SourceWriter writer) {
        writer.println("private ITransition out_ITransitionRequired;");
        writer.println("public void setOut(ITransition out) { out_ITransitionRequired = out; }");
        writer.println("private boolean current;");
        writer.println();
        writer.println("public boolean isCurrent() { return current; }");
        writer.println(
                "public void moveToNextState() { if (out_ITransitionRequired != null) current = !out_ITransitionRequired.enter(); }");
        writer.println("");
        writer.println("public ITransition getIn(Class<?> required)");
        writer.println("{");
        writer.println("  return new ITransition()");
        writer.println("  {");
        writer.println("     public boolean enter()");
        writer.println("     {");
        writer.println("        current = true;");
        writer.println("        return true;");
        writer.println("     }");
        writer.println("  };");
        writer.println("};");
    }
}