org.cyclades.io.StreamUtils Maven / Gradle / Ivy

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package org.cyclades.io;

import java.io.InputStream;
import java.io.OutputStream;

import com.google.common.io.ByteStreams;

/**
 * This class will encapsulate some general methods for IO that have been
 * found to be rewritten frequently.
 *
 */
public class StreamUtils {
    /**
     * Write from a URI to an OutpusStream
     * Note: It is the callers responsibility to close the OutputStream
     */
    public static void write (String URI, OutputStream out) throws Exception {
        write (URI, out, DEFAULT_BUFFER_SIZE);

    }

    /**
     * Write from a URI to an OutpusStream
     * Note: It is the callers repsponsibility to close the OutputStream
     *
     * @param URI
     * @param out
     * @param bufferSize - is now ignored
     * @throws Exception
     */
    public static void write (String URI, OutputStream out, int bufferSize) throws Exception {
        InputStream is = null;
        try {
            if (bufferSize < 1) throw new Exception("Invalid buffer size: " + bufferSize);
            is = ResourceRequestUtils.getInputStream(URI, null);
            ByteStreams.copy(is, out);
        } catch (Exception ex) {
            throw new Exception(ex);

        } finally {
            try {
                is.close();
            } catch (Exception ignore) {}
        }
    } // end of write(...)

    public static final int DEFAULT_BUFFER_SIZE = 1024;
}