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package com.sun.enterprise.deployment.annotation.factory;

import java.util.HashSet;
import java.util.Set;

import com.sun.enterprise.deployment.annotation.AnnotationHandler;
import com.sun.enterprise.deployment.annotation.AnnotationProcessor;
import com.sun.enterprise.deployment.annotation.handlers.*;
import com.sun.enterprise.deployment.annotation.impl.AnnotationProcessorImpl;

/**
 * This factory is responsible for initializing a ready to use
 * AnnotationProcessor for external module. 
 *
 */
public class ExtensionModuleAnnotationFactory extends Factory {
    private static Set<String> annotationClassNames = new HashSet<String>();
                                                                                
    private static AnnotationProcessorImpl systemProcessor = null;
    private String moduleType = null;
                                                                                
    ExtensionModuleAnnotationFactory(String mType) {
        moduleType = mType;
    }
                                                                                
    public static AnnotationProcessor getAnnotationProcessor() {
        init();
        AnnotationProcessorImpl processor = getDefaultAnnotationProcessor();
        processor.setDelegate(systemProcessor);
        return processor;
    }
                                                                                
    public static Set<String> getAnnotations() {
        init();
        return (HashSet)((HashSet)annotationClassNames).clone();
    }
                                                                                
    public static AnnotationProcessor getSystemAnnotationProcessor() {
        return systemProcessor;
    }

    public static void registerAnnotationHandler(AnnotationHandler handler) {
        init();
        systemProcessor.pushAnnotationHandler(handler);
        annotationClassNames.add("L" +
            handler.getAnnotationType().getName().replace('.', '/') + ";");
    }
                                                                                
    private static void init() {
        if (systemProcessor == null) {
            synchronized(Factory.class) {
                if (systemProcessor == null) {
                    // initialize our system annotation processor...
                    systemProcessor = new AnnotationProcessorImpl();
                }
            }
        }
    }
                                                                                
    public String getModuleType() {
        return moduleType;
    }
}
