Package com.google.gwt.user.server.rpc

Class TeeWriter<W extends java.io.Writer>

  • Type Parameters:
    W - the type of the other writer to which output is sent in parallel
    All Implemented Interfaces:
    java.io.Closeable, java.io.Flushable, java.lang.Appendable, java.lang.AutoCloseable
    public class TeeWriter<W extends java.io.Writer>
extends java.io.FilterWriter
    A writer that wraps one writer and copies all output written to it not only to that one writer but also to another writer ("tee"). It is permissible to use null as the other writer in which case this TeeWriter behaves like a regular FilterWriter. The other writer can be obtained by calling getOtherWriter(). This can, e.g., be used with a StringWriter from which the output written to this writer can later be obtained as a single String.

    • Field Summary

      • Fields inherited from class java.io.FilterWriter

        out

      • Fields inherited from class java.io.Writer

        lock

    • Constructor Summary

      Constructors 
      Constructor Description
      TeeWriter​(java.io.Writer out, W tee)  

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      void close()  
      void flush()  
      W getOtherWriter()  
      void setOtherWriter​(W tee)
      If a "tee" writer hasn't been set at construction time and as long as nothing has been written to this writer, a caller may use this method to set a "tee" writer once.
      void write​(char[] cbuf, int off, int len)  
      void write​(int c)  
      void write​(java.lang.String str, int off, int len)  

      • Methods inherited from class java.io.Writer

        append, append, append, nullWriter, write, write

      • Methods inherited from class java.lang.Object

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

    • Constructor Detail

      • TeeWriter

        public TeeWriter​(java.io.Writer out,
                 W tee)

    • Method Detail

      • getOtherWriter

        public W getOtherWriter()

      • setOtherWriter

        public void setOtherWriter​(W tee)
        If a "tee" writer hasn't been set at construction time and as long as nothing has been written to this writer, a caller may use this method to set a "tee" writer once.
        Throws:
        java.lang.IllegalStateException - in case a "tee" has already been set (or formally, getOtherWriter()!= null) or data has already been written to this writer using any of the write methods.

      • write

        public void write​(int c)
           throws java.io.IOException
        Overrides:
        write in class java.io.FilterWriter
        Throws:
        java.io.IOException

      • write

        public void write​(char[] cbuf,
                  int off,
                  int len)
           throws java.io.IOException
        Overrides:
        write in class java.io.FilterWriter
        Throws:
        java.io.IOException

      • write

        public void write​(java.lang.String str,
                  int off,
                  int len)
           throws java.io.IOException
        Overrides:
        write in class java.io.FilterWriter
        Throws:
        java.io.IOException

      • flush

        public void flush()
           throws java.io.IOException
        Specified by:
        flush in interface java.io.Flushable
        Overrides:
        flush in class java.io.FilterWriter
        Throws:
        java.io.IOException

      • close

        public void close()
           throws java.io.IOException
        Specified by:
        close in interface java.lang.AutoCloseable
        Specified by:
        close in interface java.io.Closeable
        Overrides:
        close in class java.io.FilterWriter
        Throws:
        java.io.IOException