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/*
 * Created onSaturday, May 07 2011 00:40
 */
package com.jogamp.opencl.util.concurrent;

import com.jogamp.opencl.CLCommandQueue;
import com.jogamp.opencl.CLProgram;
import com.jogamp.opencl.util.concurrent.CLQueueContext.CLSimpleQueueContext;

/**
 * Creates {@link CLQueueContext}s.
 * @author Michael Bien
 */
public abstract class CLQueueContextFactory {

    /**
     * Creates a new queue context for the given queue.
     * @param old the old context or null.
     */
    public abstract C setup(CLCommandQueue queue, CLQueueContext old);


    /**
     * Creates a simple context factory producing single program contexts.
     * @param source sourcecode of a OpenCL program.
     */
    public static CLSimpleContextFactory createSimple(final String source) {
        return new CLSimpleContextFactory(source);
    }

    /**
     * Creates {@link CLSimpleQueueContext}s containing a precompiled program.
     * @author Michael Bien
     */
    public static class CLSimpleContextFactory extends CLQueueContextFactory {

        private final String source;

        public CLSimpleContextFactory(final String source) {
            this.source = source;
        }

        @Override
        public CLSimpleQueueContext setup(final CLCommandQueue queue, final CLQueueContext old) {
            final CLProgram program = queue.getContext().createProgram(source).build(queue.getDevice());
            return new CLSimpleQueueContext(queue, program);
        }

    }

}