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Diffstat (limited to 'java/rasj/RasMArrayDouble.java')
| -rw-r--r-- | java/rasj/RasMArrayDouble.java | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/java/rasj/RasMArrayDouble.java b/java/rasj/RasMArrayDouble.java new file mode 100644 index 0000000..955ef6a --- /dev/null +++ b/java/rasj/RasMArrayDouble.java @@ -0,0 +1,195 @@ +package rasj; + +import rasj.*; +import rasj.odmg.*; +import rasj.global.*; + +import java.io.*; + +/* +* This file is part of rasdaman community. +* +* Rasdaman community is free software: you can redistribute it and/or modify +* it under the terms of the GNU General Public License as published by +* the Free Software Foundation, either version 3 of the License, or +* (at your option) any later version. +* +* Rasdaman community is distributed in the hope that it will be useful, +* but WITHOUT ANY WARRANTY; without even the implied warranty of +* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +* GNU General Public License for more details. +* +* You should have received a copy of the GNU General Public License +* along with rasdaman community. If not, see <http://www.gnu.org/licenses/>. +* +* Copyright 2003, 2004, 2005, 2006, 2007, 2008, 2009 Peter Baumann / +rasdaman GmbH. +* +* For more information please see <http://www.rasdaman.org> +* or contact Peter Baumann via <baumann@rasdaman.com>. +*/ +/** *********************************************************** + * <pre> + * + * PURPOSE: + * This class represents a MArray with base type double. + * @version $Revision: 1.5 $ + * method intersectionWith(RasMInterval) uses byte array and is not optimized for special data arrays + * + * + * COMMENTS: + * + * </pre> + *********************************************************** */ + + +public class RasMArrayDouble extends RasGMArray +{ + + /** default constructor */ + public RasMArrayDouble() + { + super(); + typeLength = SIZE_OF_DOUBLE; + } + + /** + * constructor for uninitialized MDD objects + * @param initDomain The initial Domain of the MArray + */ + public RasMArrayDouble(final RasMInterval initDomain) + { + super(initDomain, SIZE_OF_DOUBLE); + objectData = new double[(int)(dataSize/SIZE_OF_DOUBLE)]; + data = null; + } + + /** + * Constructor for uninitialized MDD objects with Storage Layout + * @param initDomain The initial Domain of the MArray + * @param RasStorageLayout The storage layout to be used + */ + public RasMArrayDouble(final RasMInterval initDomain, RasStorageLayout stl) + { + super(initDomain, SIZE_OF_DOUBLE, stl); + objectData = new double[(int)(dataSize/SIZE_OF_DOUBLE)]; + data = null; + } + + /** + * copy constructor + * @param obj a copy of this object will be created + */ + public RasMArrayDouble(final RasMArrayDouble obj) + { + super(obj); + if(obj.objectData!=null) + { + objectData = new double[(int)(obj.dataSize/SIZE_OF_DOUBLE)]; + System.arraycopy(obj.getDoubleArray(), 0, objectData, 0, (int)(obj.dataSize/SIZE_OF_DOUBLE)); + data = null; + } + } + + /** + * subscript operator for read access of a cell. The cell value is returned + * as a byte[4] array. This kind of access to a cell is significantly slower + * than getDouble(), because each cell value has to be converted from double to a + * byte[SIZE_OF_DOUBLE] array. + * The user has to take care that each Cell value is stored, before getting the next Cell. + */ + public byte[] getCell(RasPoint point) + throws RasDimensionMismatchException, RasIndexOutOfBoundsException + { + double cellValue; + long tmp; + + //first test dimensionality + if(point.dimension() != domain.dimension()) + throw new RasDimensionMismatchException(point.dimension(), domain.dimension()); + + cellValue = ((double[])objectData)[(int)domain.cellOffset(point)]; + for(int i=0; i<SIZE_OF_DOUBLE; i++) + { + tmp = Double.doubleToRawLongBits(cellValue); + tmp >>>= (((SIZE_OF_DOUBLE -1)-i)*8); + currentCell[i] = (byte)tmp; + } + + return currentCell; + } + + /** subscript operator for read access of a cell. The cell value is returned as + * an double. This access method is faster then getCell(), because no conversion + * from double to Byte[SIZE_OF_DOUBLE] has to be done. + */ + public double getDouble(final RasPoint point) + throws RasDimensionMismatchException, RasIndexOutOfBoundsException + { + // first test dimensionality + if(point.dimension() != domain.dimension()) + throw new RasDimensionMismatchException(point.dimension(), domain.dimension()); + + return ((double[])objectData)[(int)domain.cellOffset(point)]; + } + + /** + * get the internal representation of the array + */ + public double[] getDoubleArray() + { + if(objectData==null) + { + ByteArrayInputStream bis = new ByteArrayInputStream(data); + DataInputStream dis = new DataInputStream(bis); + objectData = new double[data.length/SIZE_OF_DOUBLE]; + try + { + for(int j=0; j<data.length/SIZE_OF_DOUBLE; j++) + { + ((double[])objectData)[j] = dis.readDouble(); + } + } + catch(IOException e) + { + throw new RasClientInternalException("RasMArrayDouble", "getDoubleArray()", + "IOException while converting data to objectData array " + e.getMessage()); + } + } + return (double[])objectData; + } + + /** get the internal representation of the array in bytes, + * please use getDoubleArray() + */ + public byte[] getArray() + { + if(data==null) + { + ByteArrayOutputStream bos = new ByteArrayOutputStream(); + DataOutputStream dos = new DataOutputStream(bos); + try + { + for(int j=0; j<((double[])objectData).length; j++) + dos.writeDouble(((double[])objectData)[j]); + } + catch(IOException e) + { + throw new RasClientInternalException("RasMArrayDouble", "getArray()", + "IOException while converting objectData to data array " + e.getMessage()); + } + data = bos.toByteArray(); + } + return data; + } + + /** set the internal representation of the array */ + public void setArray(double[] newData) + { + objectData = newData; + data = null; + dataSize = newData.length * SIZE_OF_DOUBLE; + } + +} + |