Package org.glassfish.jersey.message.internal

Class ReaderWriter

  • public final class ReaderWriter
extends java.lang.Object
    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 8192. This value can be set using the system property "jersey.config.io.bufferSize".

    • Field Summary

      Fields 
      Modifier and Type Field Description
      static int BUFFER_SIZE
      The buffer size for arrays of byte and character.
      private static java.util.logging.Logger LOGGER  
      static java.nio.charset.Charset UTF8
      The UTF-8 Charset.

    • Constructor Summary

      Constructors 
      Modifier Constructor Description
      private ReaderWriter()
      Prevents instantiation.

    • Method Summary

      All Methods Static Methods Concrete Methods 
      Modifier and Type Method Description
      private static int getBufferSize()  
      static java.nio.charset.Charset getCharset​(javax.ws.rs.core.MediaType m)
      Get the character set from a media type.
      static java.lang.String readFromAsString​(java.io.InputStream in, javax.ws.rs.core.MediaType type)
      Read the bytes of an input stream and convert to a string.
      static java.lang.String readFromAsString​(java.io.Reader reader)
      Read the characters of a reader and convert to a string.
      static void safelyClose​(java.io.Closeable closeable)
      Safely close a closeable, without throwing an exception.
      static void writeTo​(java.io.InputStream in, java.io.OutputStream out)
      Read bytes from an input stream and write them to an output stream.
      static void writeTo​(java.io.Reader in, java.io.Writer out)
      Read characters from an input stream and write them to an output stream.
      static void writeToAsString​(java.lang.String s, java.io.OutputStream out, javax.ws.rs.core.MediaType type)
      Convert a string to bytes and write those bytes to an output stream.

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • Field Detail

      • LOGGER

        private static final java.util.logging.Logger LOGGER

      • UTF8

        public static final java.nio.charset.Charset UTF8
        The UTF-8 Charset.

      • BUFFER_SIZE

        public static final int BUFFER_SIZE
        The buffer size for arrays of byte and character.

    • Constructor Detail

      • ReaderWriter

        private ReaderWriter()
        Prevents instantiation.

    • Method Detail

      • getBufferSize

        private static int getBufferSize()

      • writeTo

        public static void writeTo​(java.io.InputStream in,
                           java.io.OutputStream out)
                    throws java.io.IOException
        Read bytes from an input stream and write them to an output stream.
        Parameters:
        in - the input stream to read from.
        out - the output stream to write to.
        Throws:
        java.io.IOException - if there is an error reading or writing bytes.

      • writeTo

        public static void writeTo​(java.io.Reader in,
                           java.io.Writer out)
                    throws java.io.IOException
        Read characters from an input stream and write them to an output stream.
        Parameters:
        in - the reader to read from.
        out - the writer to write to.
        Throws:
        java.io.IOException - if there is an error reading or writing characters.

      • getCharset

        public static java.nio.charset.Charset getCharset​(javax.ws.rs.core.MediaType m)
        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 UTF8 charset is utilized.

        Parameters:
        m - the media type.
        Returns:
        the character set.

      • readFromAsString

        public static java.lang.String readFromAsString​(java.io.InputStream in,
                                                javax.ws.rs.core.MediaType type)
                                         throws java.io.IOException
        Read the bytes of an input stream and convert to a string.
        Parameters:
        in - the input stream to read from.
        type - the media type that determines the character set defining how to decode bytes to characters.
        Returns:
        the string.
        Throws:
        java.io.IOException - if there is an error reading from the input stream.

      • readFromAsString

        public static java.lang.String readFromAsString​(java.io.Reader reader)
                                         throws java.io.IOException
        Read the characters of a reader and convert to a string.
        Parameters:
        reader - the reader
        Returns:
        the string
        Throws:
        java.io.IOException - if there is an error reading from the reader.

      • writeToAsString

        public static void writeToAsString​(java.lang.String s,
                                   java.io.OutputStream out,
                                   javax.ws.rs.core.MediaType type)
                            throws java.io.IOException
        Convert a string to bytes and write those bytes to an output stream.
        Parameters:
        s - the string to convert to bytes.
        out - the output stream to write to.
        type - the media type that determines the character set defining how to decode bytes to characters.
        Throws:
        java.io.IOException - in case of a write failure.

      • safelyClose

        public static void safelyClose​(java.io.Closeable closeable)
        Safely close a closeable, without throwing an exception.
        Parameters:
        closeable - object to be closed.