Android InputStream Copy copy(InputStream input, Writer output)

Description

Copy and convert bytes from an InputStream to chars on a Writer.

License

Apache License

Parameter

Parameter	Description
input	the <code>InputStream</code> to read from
output	the <code>Writer</code> to write to

Exception

Parameter	Description
IOException	In case of an I/O problem

Declaration

public static void copy(InputStream input, Writer output)
        throws IOException

Method Source Code

//package com.java2s;
/*/*from  w  w w. j  a  va2s  .com*/
 * 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.
 */

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.Reader;
import java.io.StringReader;
import java.io.Writer;

public class Main {
    /**
     * The default size of the buffer.
     */
    private static final int DEFAULT_BUFFER_SIZE = 1024 * 4;

    /**
     * Copy bytes from a <code>byte[]</code> to an <code>OutputStream</code>.
     * @param input the byte array to read from
     * @param output the <code>OutputStream</code> to write to
     * @throws IOException In case of an I/O problem
     */
    public static void copy(byte[] input, OutputStream output)
            throws IOException {
        output.write(input);
    }

    /**
     * Copy and convert bytes from a <code>byte[]</code> to chars on a
     * <code>Writer</code>.
     * The platform's default encoding is used for the byte-to-char conversion.
     * @param input the byte array to read from
     * @param output the <code>Writer</code> to write to
     * @throws IOException In case of an I/O problem
     */
    public static void copy(byte[] input, Writer output) throws IOException {
        ByteArrayInputStream in = new ByteArrayInputStream(input);
        copy(in, output);
    }

    /**
     * Copy and convert bytes from a <code>byte[]</code> to chars on a
     * <code>Writer</code>, using the specified encoding.
     * @param input the byte array to read from
     * @param output the <code>Writer</code> to write to
     * @param encoding The name of a supported character encoding. See the
     * <a href="http://www.iana.org/assignments/character-sets">IANA
     * Charset Registry</a> for a list of valid encoding types.
     * @throws IOException In case of an I/O problem
     */
    public static void copy(byte[] input, Writer output, String encoding)
            throws IOException {
        ByteArrayInputStream in = new ByteArrayInputStream(input);
        copy(in, output, encoding);
    }

    /**
     * Copy bytes from an <code>InputStream</code> to an
     * <code>OutputStream</code>.
     * @param input the <code>InputStream</code> to read from
     * @param output the <code>OutputStream</code> to write to
     * @return the number of bytes copied
     * @throws IOException In case of an I/O problem
     */
    public static int copy(InputStream input, OutputStream output)
            throws IOException {
        byte[] buffer = new byte[DEFAULT_BUFFER_SIZE];
        int count = 0;
        int n = 0;
        while (-1 != (n = input.read(buffer))) {
            output.write(buffer, 0, n);
            count += n;
        }
        return count;
    }

    /**
     * Copy chars from a <code>Reader</code> to a <code>Writer</code>.
     * @param input the <code>Reader</code> to read from
     * @param output the <code>Writer</code> to write to
     * @return the number of characters copied
     * @throws IOException In case of an I/O problem
     */
    public static int copy(Reader input, Writer output) throws IOException {
        char[] buffer = new char[DEFAULT_BUFFER_SIZE];
        int count = 0;
        int n = 0;
        while (-1 != (n = input.read(buffer))) {
            output.write(buffer, 0, n);
            count += n;
        }
        return count;
    }

    /**
     * Copy and convert bytes from an <code>InputStream</code> to chars on a
     * <code>Writer</code>.
     * The platform's default encoding is used for the byte-to-char conversion.
     * @param input the <code>InputStream</code> to read from
     * @param output the <code>Writer</code> to write to
     * @throws IOException In case of an I/O problem
     */
    public static void copy(InputStream input, Writer output)
            throws IOException {
        InputStreamReader in = new InputStreamReader(input);
        copy(in, output);
    }

    /**
     * Copy and convert bytes from an <code>InputStream</code> to chars on a
     * <code>Writer</code>, using the specified encoding.
     * @param input the <code>InputStream</code> to read from
     * @param output the <code>Writer</code> to write to
     * @param encoding The name of a supported character encoding. See the
     * <a href="http://www.iana.org/assignments/character-sets">IANA
     * Charset Registry</a> for a list of valid encoding types.
     * @throws IOException In case of an I/O problem
     */
    public static void copy(InputStream input, Writer output,
            String encoding) throws IOException {
        InputStreamReader in = new InputStreamReader(input, encoding);
        copy(in, output);
    }

    /**
     * Serialize chars from a <code>Reader</code> to bytes on an
     * <code>OutputStream</code>, and flush the <code>OutputStream</code>.
     * @param input the <code>Reader</code> to read from
     * @param output the <code>OutputStream</code> to write to
     * @throws IOException In case of an I/O problem
     */
    public static void copy(Reader input, OutputStream output)
            throws IOException {
        OutputStreamWriter out = new OutputStreamWriter(output);
        copy(input, out);
        // XXX Unless anyone is planning on rewriting OutputStreamWriter, we
        // have to flush here.
        out.flush();
    }

    /**
     * Serialize chars from a <code>String</code> to bytes on an
     * <code>OutputStream</code>, and
     * flush the <code>OutputStream</code>.
     * @param input the <code>String</code> to read from
     * @param output the <code>OutputStream</code> to write to
     * @throws IOException In case of an I/O problem
     */
    public static void copy(String input, OutputStream output)
            throws IOException {
        StringReader in = new StringReader(input);
        OutputStreamWriter out = new OutputStreamWriter(output);
        copy(in, out);
        // XXX Unless anyone is planning on rewriting OutputStreamWriter, we
        // have to flush here.
        out.flush();
    }

    /**
     * Copy chars from a <code>String</code> to a <code>Writer</code>.
     * @param input the <code>String</code> to read from
     * @param output the <code>Writer</code> to write to
     * @throws IOException In case of an I/O problem
     */
    public static void copy(String input, Writer output) throws IOException {
        output.write(input);
    }
}

Android InputStream Copy copy(InputStream input, Writer output)

Description

License

Parameter

Exception

Declaration

Method Source Code

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