juneau-core/juneau-marshall/src/main/java/org/apache/juneau/internal/NoCloseOutputStream.java

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// *  http://www.apache.org/licenses/LICENSE-2.0                                                                             *
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// ***************************************************************************************************************************
package org.apache.juneau.internal;

import java.io.*;

/**
 * Wraps an existing {@link OutputStream} where the {@link #close()} method is a no-op.
 *
 * <p>
 * Useful in cases where you're working with streams that should not be implicitly closed.
 */
public final class NoCloseOutputStream extends OutputStream {

	private final OutputStream os;

	/**
	 * Constructor.
	 *
	 * @param os The output stream to wrap.
	 */
	public NoCloseOutputStream(OutputStream os) {
		this.os = os;
	}

	@Override /* OutputStream */
	public void write(int b) throws IOException {
		os.write(b);
	}

	@Override /* OutputStream */
	public void write(byte[] b) throws IOException {
		os.write(b);
	}

	@Override /* OutputStream */
	public void write(byte[] b, int off, int len) throws IOException {
		os.write(b, off, len);
	}

	@Override /* OutputStream */
	public void flush() throws IOException {
		os.flush();
	}

	@Override /* OutputStream */
	public void close() throws IOException {
		os.flush();
	}
}