Examples of java.nio.DoubleBuffer

java.nio.DoubleBuffer
A buffer of doubles.
A double buffer can be created in either of the following ways:
- {@link #allocate(int) Allocate} a new double array and create a bufferbased on it;
- {@link #wrap(double[]) Wrap} an existing double array to create a newbuffer;
- Use {@link java.nio.ByteBuffer#asDoubleBuffer() ByteBuffer.asDoubleBuffer} tocreate a double buffer based on a byte buffer.

  
  public void renderDoubleArray(Token token){
       double[] data = (double[]) token.getObject();


          ByteBuffer byteBuffer = ByteBuffer.allocate(data.length * 8);        
          DoubleBuffer dBuffer = byteBuffer.asDoubleBuffer();
          dBuffer.put(data);


          byte[] array = byteBuffer.array();
      String str = Base64.encodeBytes(array);
      props.put(token.getId()+".base64", str);
  }

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          ByteArrayInputStream bis = new ByteArrayInputStream(buf.array());
          return bis;
        } else if (type.getName().equals(CAS.TYPE_NAME_DOUBLE_ARRAY)) {
          arrayStart = this.getHeap().heap[getArrayStartAddress(fs.getAddress())];
          buf = ByteBuffer.allocate(arraySize * 8);
          DoubleBuffer doublebuf = buf.asDoubleBuffer();
          double[] doubleArray = new double[arraySize];
          for (int i = arrayStart; i < arrayStart + arraySize; i++) {
            doubleArray[i - arrayStart] = Double.longBitsToDouble(this.getLongHeap().heap[i]);
          }
          doublebuf.put(doubleArray);
          ByteArrayInputStream bis = new ByteArrayInputStream(buf.array());
          return bis;
        }


      } else if (null != aSofa.getSofaURI()) {

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      FloatBuffer floatBuffer = ((FloatBuffer)buffer).asReadOnlyBuffer();
      floatBuffer.rewind();
      readonlyBuffer = floatBuffer;
      break;
  case DOUBLE:
      DoubleBuffer doubleBuffer = ((DoubleBuffer)buffer).asReadOnlyBuffer();
      doubleBuffer.rewind();
      readonlyBuffer = doubleBuffer;
      break;
  default:
    readonlyBuffer = null;
  }

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        boolean normalsDefined     = ((vdefined & GeometryArrayRetained.NORMAL_FLOAT)   != 0);
        boolean vattrDefined       = ((vdefined & GeometryArrayRetained.VATTR_FLOAT)    != 0);
        boolean textureDefined     = ((vdefined & GeometryArrayRetained.TEXCOORD_FLOAT) != 0);


        FloatBuffer fverts = null;
        DoubleBuffer dverts = null;
        FloatBuffer fclrs = null;
        ByteBuffer bclrs = null;
        FloatBuffer[] texCoordBufs = null;
        FloatBuffer norms = null;
        FloatBuffer[] vertexAttrBufs = null;

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        boolean normalsDefined     = ((vdefined & GeometryArrayRetained.NORMAL_FLOAT)   != 0);
        boolean vattrDefined       = ((vdefined & GeometryArrayRetained.VATTR_FLOAT)    != 0);
        boolean textureDefined     = ((vdefined & GeometryArrayRetained.TEXCOORD_FLOAT) != 0);


        FloatBuffer fverts = null;
        DoubleBuffer dverts = null;
        FloatBuffer fclrs = null;
        ByteBuffer bclrs = null;
        FloatBuffer[] texCoordBufs = null;
        FloatBuffer norms = null;
        FloatBuffer[] vertexAttrBufs = null;

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        boolean normalsDefined     = ((vdefined & GeometryArrayRetained.NORMAL_FLOAT)   != 0);
        boolean vattrDefined       = ((vdefined & GeometryArrayRetained.VATTR_FLOAT)    != 0);
        boolean textureDefined     = ((vdefined & GeometryArrayRetained.TEXCOORD_FLOAT) != 0);


        FloatBuffer fverts = null;
        DoubleBuffer dverts = null;
        FloatBuffer fclrs = null;
        ByteBuffer bclrs = null;
        FloatBuffer[] texCoordBufs = null;
        FloatBuffer norms = null;
        FloatBuffer[] vertexAttrBufs = null;


        // Get vertex attribute arrays
        if (vattrDefined) {
            vertexAttrBufs = getVertexAttrSetBuffer(vertexAttrData);
        }


        // get texture arrays
        if (textureDefined) {
            texCoordBufs = getTexCoordSetBuffer(texCoords);
        }


        // process alpha for geometryArray without alpha
        boolean useAlpha = false;
        if (updateAlpha && !ignoreVertexColors) {
            useAlpha = true;
        }


        int[] sarray = null;
        int[] start_array = null;
        int strip_len = 0;
        if (geo_type == GeometryRetained.GEO_TYPE_TRI_STRIP_SET ||
                geo_type == GeometryRetained.GEO_TYPE_TRI_FAN_SET   ||
                geo_type == GeometryRetained.GEO_TYPE_LINE_STRIP_SET) {
            sarray = ((GeometryStripArrayRetained) geo).stripVertexCounts;
            strip_len = sarray.length;
            start_array = ((GeometryStripArrayRetained) geo).stripStartOffsetIndices;
        }


        if (ignoreVertexColors) {
            vformat &= ~GeometryArray.COLOR;
            floatColorsDefined = false;
            byteColorsDefined = false;
        }


        // get coordinate array
        if (floatCoordDefined) {
            gl.glEnableClientState(GL2.GL_VERTEX_ARRAY);
            fverts = getVertexArrayBuffer(vfcoords, (xform == null));
            if (xform != null) {
                // Must copy in and transform data
                for (int i = initialCoordIndex; i < vcount * 3; i += 3) {
                    fverts.put(i  , (float) (xform[0]  * vfcoords[i] +
                            xform[1]  * vfcoords[i+1] +
                            xform[2]  * vfcoords[i+2]));
                    fverts.put(i+1, (float) (xform[4]  * vfcoords[i] +
                            xform[5]  * vfcoords[i+1] +
                            xform[6]  * vfcoords[i+2]));
                    fverts.put(i+2, (float) (xform[8]  * vfcoords[i] +
                            xform[9]  * vfcoords[i+1] +
                            xform[10] * vfcoords[i+2]));
                }
            }
        } else if (doubleCoordDefined) {
            gl.glEnableClientState(GL2.GL_VERTEX_ARRAY);
            dverts = getVertexArrayBuffer(vdcoords, (xform == null));
            if (xform != null) {
                // Must copy in and transform data
                for (int i = initialCoordIndex; i < vcount * 3; i += 3) {
                    dverts.put(i  , (xform[0]  * vdcoords[i] +
                            xform[1]  * vdcoords[i+1] +
                            xform[2]  * vdcoords[i+2]));
                    dverts.put(i+1, (xform[4]  * vdcoords[i] +
                            xform[5]  * vdcoords[i+1] +
                            xform[6]  * vdcoords[i+2]));
                    dverts.put(i+2, (xform[8]  * vdcoords[i] +
                            xform[9]  * vdcoords[i+1] +
                            xform[10] * vdcoords[i+2]));
                }
            }
        } else {

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        boolean normalsDefined     = ((vdefined & GeometryArrayRetained.NORMAL_FLOAT)   != 0);
        boolean vattrDefined       = ((vdefined & GeometryArrayRetained.VATTR_FLOAT)    != 0);
        boolean textureDefined     = ((vdefined & GeometryArrayRetained.TEXCOORD_FLOAT) != 0);


        FloatBuffer fverts = null;
        DoubleBuffer dverts = null;
        FloatBuffer fclrs = null;
        ByteBuffer bclrs = null;
        FloatBuffer[] texCoordBufs = null;
        FloatBuffer norms = null;
        FloatBuffer[] vertexAttrBufs = null;

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    private static DoubleBuffer getNIOBuffer(double[] array, ThreadLocal<DoubleBuffer> threadLocal, boolean copyData) {
        if (array == null) {
            return null;
        }
        DoubleBuffer buf = threadLocal.get();
        if (buf == null) {
      buf = Buffers.newDirectDoubleBuffer(array.length);
            threadLocal.set(buf);
        } else {
            buf.rewind();
            if (buf.remaining() < array.length) {
                int newSize = Math.max(2 * buf.remaining(), array.length);
        buf = Buffers.newDirectDoubleBuffer(newSize);
                threadLocal.set(buf);
            }
        }
        if (copyData) {
            buf.put(array);
            buf.rewind();
        }
        return buf;
    }

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        if (buf == null) {
            return null;
        }
        buf.rewind();


        DoubleBuffer copy;
        if (isDirect(buf)) {
            copy = createDoubleBuffer(buf.limit());
        } else {
            copy = DoubleBuffer.allocate(buf.limit());
        }
        copy.put(buf);


        return copy;
    }

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    }
    public void testDoubleBufferPut() {
        final double MAGIC = 1234.5678;
        Memory m = new Memory(8);
        ByteBuffer buf = m.getByteBuffer(0, m.size()).order(ByteOrder.nativeOrder());
        DoubleBuffer db = buf.asDoubleBuffer();
        db.put(MAGIC).flip();
        assertEquals("Int not written to memory", MAGIC, 
                m.getDouble(0));
    }

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