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/*
 * ====================================================================
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * .
 *
 */

package org.apache.http.impl.io;

import java.io.InputStream;

/**
 * @since 4.4
 */
public final class EmptyInputStream extends InputStream {

    public static final EmptyInputStream INSTANCE = new EmptyInputStream();

    private EmptyInputStream() {
    }

    @Override
    public int available() {
        return 0;
    }

    @Override
    public void close() {
    }

    @Override
    public void mark(final int readLimit) {
    }

    @Override
    public boolean markSupported() {
        return true;
    }

    @Override
    public int read() {
        return -1;
    }

    @Override
    public int read(final byte[] buf) {
        return -1;
    }

    @Override
    public int read(final byte[] buf, final int off, final int len) {
        return -1;
    }

    @Override
    public void reset() {
    }

    @Override
    public long skip(final long n) {
        return 0L;
    }
}