All Downloads are FREE. Search and download functionalities are using the official Maven repository.

com.sun.jersey.core.util.ReaderWriter Maven / Gradle / Ivy

The newest version!
/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 2010-2011 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * http://glassfish.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
 * "Portions Copyright [year] [name of copyright owner]"
 *
 * Contributor(s):
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
 * holder.
 */

package com.sun.jersey.core.util;

import java.io.BufferedWriter;
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.Writer;
import java.nio.charset.Charset;
import javax.ws.rs.core.MediaType;

/**
 * A utility class for reading and writing using byte and character streams.
 * 

* If a byte or character array is utilized then the size of the array * is by default the value of {@link #DEFAULT_BUFFER_SIZE}. This value can * be set using the system property {@link #BUFFER_SIZE_SYSTEM_PROPERTY}. * * @author [email protected] */ public final class ReaderWriter { /** * The UTF-8 Charset. */ public static final Charset UTF8 = Charset.forName("UTF-8"); /** * The system property to set the default buffer size for arrays * of byte and character. *

* If the property value is not a positive integer then the default buffer * size declared by {@link #DEFAULT_BUFFER_SIZE} will be utilized. */ public static final String BUFFER_SIZE_SYSTEM_PROPERTY = "com.sun.jersey.core.util.ReaderWriter.BufferSize"; /** * The default buffer size for arrays of byte and character. */ public static final int DEFAULT_BUFFER_SIZE = 8192; /** * The buffer size for arrays of byte and character. */ public static final int BUFFER_SIZE = getBufferSize(); private static int getBufferSize() { String v = System.getProperty( BUFFER_SIZE_SYSTEM_PROPERTY, Integer.toString(DEFAULT_BUFFER_SIZE)); try { int i = Integer.valueOf(v); if (i <= 0) throw new NumberFormatException(); return i; } catch (NumberFormatException ex) { return DEFAULT_BUFFER_SIZE; } } /** * Read bytes from an input stream and write them to an output stream. * * @param in the input stream to read from. * @param out the output stream to write to. * @throws IOException if there is an error reading or writing bytes. */ public static final void writeTo(InputStream in, OutputStream out) throws IOException { int read; final byte[] data = new byte[BUFFER_SIZE]; while ((read = in.read(data)) != -1) out.write(data, 0, read); } /** * Read characters from an input stream and write them to an output stream. * * @param in the reader to read from. * @param out the writer to write to. * @throws IOException if there is an error reading or writing characters. */ public static final void writeTo(Reader in, Writer out) throws IOException { int read; final char[] data = new char[BUFFER_SIZE]; while ((read = in.read(data)) != -1) out.write(data, 0, read); } /** * Get the character set from a media type. *

* The character set is obtained from the media type parameter "charset". * If the parameter is not present the {@link #UTF8} charset is utilized. * * @param m the media type. * @return the character set. */ public static final Charset getCharset(MediaType m) { String name = (m == null) ? null : m.getParameters().get("charset"); return (name == null) ? UTF8 : Charset.forName(name); } /** * Read the bytes of an input stream and convert to a string. * * @param in the input stream to read from. * @param type the media type that determines the character set defining * how to decode bytes to charaters. * @return the string. * @throws IOException if there is an error reading from the input stream. */ public static final String readFromAsString(InputStream in, MediaType type) throws IOException { return readFromAsString(new InputStreamReader(in, getCharset(type))); } /** * Read the characters of a reader and convert to a string. * * @param reader the reader * @return the string * @throws IOException if there is an error reading from the reader. */ public static final String readFromAsString(Reader reader) throws IOException { StringBuilder sb = new StringBuilder(); char[] c = new char[BUFFER_SIZE]; int l; while ((l = reader.read(c)) != -1) { sb.append(c, 0, l); } return sb.toString(); } /** * Convert a string to bytes and write those bytes to an output stream. * * @param s the string to convert to bytes. * @param out the output stream to write to. * @param type the media type that determines the character set defining * how to decode bytes to characters. * @throws IOException */ public static final void writeToAsString(String s, OutputStream out, MediaType type) throws IOException { Writer osw = new BufferedWriter(new OutputStreamWriter(out, getCharset(type))); osw.write(s); osw.flush(); } }





© 2015 - 2024 Weber Informatics LLC | Privacy Policy