Examples of org.freehep.util.io.ByteCountOutputStream$Buffer

org.luaj.vm2.Buffer
Allows to write to some internal buffer and keep count of any set of stacked buffers written. When a pushBuffer is called, a new buffer is created. When a popBuffer is called, the number of bytes written to the popped buffer is returned. From this moment on one is writing again to the underlying buffer/outputstream. A header can be written and the header can be written. By calling append(), the previous buffer will be appended to the underlying one. This way one can write into a buffer, retrieve its length, create some header bytes and insert those in front of the just written buffer. @author Mark Donszelmann @author Ian Graham - added popBufferBytes() for use by CGMOutputStream @version $Id: ByteCountOutputStream.java 8584 2006-08-10 23:06:37Z duns $

    /**
     * Tests interrupted remove.
     */
    public void testInterruptedRemove() {


        Buffer blockingBuffer = BlockingBuffer.decorate(new MyBuffer());
        Object obj = new Object();
        
        // spawn a read thread to wait on the empty buffer
        ArrayList exceptionList = new ArrayList();
        Thread thread = new ReadThread(blockingBuffer, obj, exceptionList, "remove");

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    public Collection makeCollection() {
        return UnmodifiableBuffer.decorate(new UnboundedFifoBuffer());
    }


    public Collection makeFullCollection() {
        Buffer buffer = new UnboundedFifoBuffer();
        buffer.addAll(Arrays.asList(getFullElements()));
        return UnmodifiableBuffer.decorate(buffer);
    }

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        return false;
    }


    public void testBufferRemove() {
        resetEmpty();
        Buffer buffer = (Buffer) collection;
        try {
            buffer.remove();
            fail();
        } catch (UnsupportedOperationException ex) {
        }
    }

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    public void testCircularFifoBufferCircular() {
        List list = new ArrayList();
        list.add("A");
        list.add("B");
        list.add("C");
        Buffer buf = new CircularFifoBuffer(list);


        assertEquals(true, buf.contains("A"));
        assertEquals(true, buf.contains("B"));
        assertEquals(true, buf.contains("C"));


        buf.add("D");


        assertEquals(false, buf.contains("A"));
        assertEquals(true, buf.contains("B"));
        assertEquals(true, buf.contains("C"));
        assertEquals(true, buf.contains("D"));


        assertEquals("B", buf.get());
        assertEquals("B", buf.remove());
        assertEquals("C", buf.remove());
        assertEquals("D", buf.remove());
    }

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    }


    //-----------------------------------------------------------------------  
    public void testBufferEmpty() {
        resetEmpty();
        Buffer buffer = (Buffer) collection;


        assertEquals(0, buffer.size());
        assertEquals(true, buffer.isEmpty());
        try {
            buffer.get();
            fail();
        } catch (BufferUnderflowException ex) {
        }


        try {
            buffer.remove();
            fail();
        } catch (BufferUnderflowException ex) {
        }
    }

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    public Collection makeCollection() {
        return SynchronizedBuffer.decorate(new UnboundedFifoBuffer());
    }


    public Collection makeFullCollection() {
        Buffer buffer = new UnboundedFifoBuffer();
        buffer.addAll(Arrays.asList(getFullElements()));
        return SynchronizedBuffer.decorate(buffer);
    }

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    public Buffer makeTestBuffer() {
        return decorateBuffer(new ArrayStack(), testPredicate);
    }


    public void testGet() {
        Buffer buffer = makeTestBuffer();
        try {
            Object o = buffer.get();
            fail("Expecting BufferUnderflowException");
        } catch (BufferUnderflowException ex) {
            // expected
        }
        buffer.add("one");
        buffer.add("two");
        buffer.add("three");
        assertEquals("Buffer get", buffer.get(), "three");
    }

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        buffer.add("three");
        assertEquals("Buffer get", buffer.get(), "three");
    }


    public void testRemove() {
        Buffer buffer = makeTestBuffer();
        buffer.add("one");
        assertEquals("Buffer get", buffer.remove(), "one");
        try {
            buffer.remove();
            fail("Expecting BufferUnderflowException");
        } catch (BufferUnderflowException ex) {
            // expected
        }
    }

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        String[] testCaseName = {TestTransformedBuffer.class.getName()};
        junit.textui.TestRunner.main(testCaseName);
    }


    public void testTransformedBuffer() {
        Buffer buffer = TransformedBuffer.decorate(new ArrayStack(), TestTransformedCollection.STRING_TO_INTEGER_TRANSFORMER);
        assertEquals(0, buffer.size());
        Object[] els = new Object[]{"1", "3", "5", "7", "2", "4", "6"};
        for (int i = 0; i < els.length; i++) {
            buffer.add(els[i]);
            assertEquals(i + 1, buffer.size());
            assertEquals(true, buffer.contains(new Integer((String) els[i])));
            assertEquals(false, buffer.contains(els[i]));
        }


        assertEquals(false, buffer.remove(els[0]));
        assertEquals(true, buffer.remove(new Integer((String) els[0])));


    }

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   * except as arguments to the q option. 
   */
  static Varargs format( Varargs args ) {
    LuaString fmt = args.checkstring( 1 );
    final int n = fmt.length();
    Buffer result = new Buffer(n);
    int arg = 1;
    int c;
    
    for ( int i = 0; i < n; ) {
      switch ( c = fmt.luaByte( i++ ) ) {
      case '\n':
        result.append( "\n" );
        break;
      default:
        result.append( (byte) c );
        break;
      case L_ESC:
        if ( i < n ) {
          if ( ( c = fmt.luaByte( i ) ) == L_ESC ) {
            ++i;
            result.append( (byte)L_ESC );
          } else {
            arg++;
            FormatDesc fdsc = new FormatDesc(args, fmt, i );
            i += fdsc.length;
            switch ( fdsc.conversion ) {
            case 'c':
              fdsc.format( result, (byte)args.checkint( arg ) );
              break;
            case 'i':
            case 'd':
              fdsc.format( result, args.checkint( arg ) );
              break;
            case 'o':
            case 'u':
            case 'x':
            case 'X':
              fdsc.format( result, args.checklong( arg ) );
              break;
            case 'e':
            case 'E':
            case 'f':
            case 'g':
            case 'G':
              fdsc.format( result, args.checkdouble( arg ) );
              break;
            case 'q':
              addquoted( result, args.checkstring( arg ) );
              break;
            case 's': {
              LuaString s = args.checkstring( arg );
              if ( fdsc.precision == -1 && s.length() >= 100 ) {
                result.append( s );
              } else {
                fdsc.format( result, s );
              }
            }  break;
            default:
              error("invalid option '%"+(char)fdsc.conversion+"' to 'format'");
              break;
            }
          }
        }
      }
    }
    
    return result.tostring();
  }

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