DefaultInstantiableCreatorGenerator.java

package com.asayama.gwt.angular.rebind;

import java.util.logging.Level;
import java.util.logging.Logger;

import com.google.gwt.core.ext.GeneratorContext;
import com.google.gwt.core.ext.TreeLogger;
import com.google.gwt.core.ext.typeinfo.JClassType;
import com.google.gwt.core.ext.typeinfo.JMethod;

public class DefaultInstantiableCreatorGenerator extends AbstractFactoryGenerator {

    private static final String CLASS = DefaultInstantiableCreatorGenerator.class.getName();
    private static final Logger LOG = Logger.getLogger(CLASS);

    @Override
    String getFilename() {
        return "com/asayama/gwt/angular/rebind/CreatorFactory.vm";
    }

    @Override
    protected String generate(TreeLogger logger, GeneratorContext context,
            VelocityGenerator velocity, String packageName, String className) {
        JClassType classType = getClassType(context, packageName + "." + className);
        String creatorReturnType = getCreatorReturnType(classType);
        velocity.put("creatorReturnType", creatorReturnType);
        return super
                .generate(logger, context, velocity, packageName, className);
    }

    protected String getCreatorReturnType(JClassType classType) {
        final String METHOD = "getCreatorReturnType(JClassType)";
        String creatorReturnType = null;
        JMethod[] methods = classType.getMethods();
        for (JMethod method : methods) {
            creatorReturnType = method.getReturnType().getQualifiedSourceName();
            if (creatorReturnType != null) {
                break;// we expect to see only one creator method
            }
        }
        if (creatorReturnType == null) {
            LOG.logp(Level.WARNING, CLASS, METHOD,
                    "Unable to identify creatorReturnType.");
        }
        return creatorReturnType;
    }

}