org.glassfish.grizzly.filterchain.FilterChainProcessorSelector Maven / Gradle / Ivy

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package org.glassfish.grizzly.filterchain;

import org.glassfish.grizzly.Connection;
import org.glassfish.grizzly.IOEvent;
import org.glassfish.grizzly.Processor;
import org.glassfish.grizzly.ProcessorSelector;

/**
 * {@link ProcessorSelector} implementation, which delegates processing
 * of {@link IOEvent} to the {@link FilterChain}.
 *
 * @see ProcessorSelector
 * 
 * @author Alexey Stashok
 */
public class FilterChainProcessorSelector implements ProcessorSelector {

    /**
     * {@link FilterChainBuilder}, responsible for creating {@link FilterChain}
     * instances
     */
    protected final FilterChainBuilder builder;

    public FilterChainProcessorSelector(FilterChainBuilder builder) {
        this.builder = builder;
    }

    /**
     * Returns {@link FilterChain} instance, if it's interested in processing
     * passed {@link IOEvent}, or null otherwise.
     * 
     * @param ioEvent {@link IOEvent} to process.
     * @param connection {@link Connection}, where {@link IOEvent} occured.
     *
     * @return {@link FilterChain} instance, if it's interested in processing
     * passed {@link IOEvent}, or null otherwise.
     */
    @Override
    public Processor select(IOEvent ioEvent, Connection connection) {

        FilterChain chain = builder.build();
        if (chain.isInterested(ioEvent)) {
            return chain;
        }

        return null;
    }
}