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package org.apache.juneau.encoders;

import java.io.*;

/**
 * Encoder for handling <js>"identity"</js> encoding and decoding.
 *
 * <p>
 * Identity encoding is just another name for no encoding at all.
 *
 * <ul class='notes'>
 * 	<li class='note'>This class is thread safe and reusable.
 * </ul>
 *
 * <ul class='seealso'>
 * 	<li class='link'>{@doc jm.Encoders}
 * 	<li class='extlink'>{@source}
 * </ul>
 */
public class IdentityEncoder extends Encoder {

	/** Singleton */
	public static final IdentityEncoder INSTANCE = new IdentityEncoder();

	/** Constructor. */
	public IdentityEncoder() {}

	@Override /* Encoder */
	public InputStream getInputStream(InputStream is) throws IOException {
		return is;
	}

	@Override /* Encoder */
	public OutputStream getOutputStream(OutputStream os) throws IOException {
		return os;
	}

	/**
	 * Returns <code>[<js>"identity"</js>]</code>.
	 */
	@Override /* Encoder */
	public String[] getCodings() {
		return new String[]{"identity"};
	}
}
