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Diffstat (limited to 'java/rasj/RasMArrayLong.java')
-rw-r--r-- | java/rasj/RasMArrayLong.java | 198 |
1 files changed, 198 insertions, 0 deletions
diff --git a/java/rasj/RasMArrayLong.java b/java/rasj/RasMArrayLong.java new file mode 100644 index 0000000..936f460 --- /dev/null +++ b/java/rasj/RasMArrayLong.java @@ -0,0 +1,198 @@ +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 long. + * @version $Revision: 1.7 $ + * for ODMG type Long(4 bytes, due to ODMG standard) please use RasMArrayInteger, + * for ODMG type ULong(4 bytes, due to ODMG standard) you can use RasMArrayLong, + * but only values up to 2^32 (performance loss because of convertion 8 bytes-> 4 bytes!); + * method intersectionWith(RasMInterval) uses byte array and is not optimized for special data arrays + * + * + * + * COMMENTS: + * + * </pre> + *********************************************************** */ + +public class RasMArrayLong extends RasGMArray +{ + + /** default constructor */ + public RasMArrayLong() + { + super(); + typeLength = SIZE_OF_LONG; + } + + /** + * constructor for uninitialized MDD objects + * @param initDomain The initial Domain of the MArray + */ + public RasMArrayLong(final RasMInterval initDomain) + { + super(initDomain, SIZE_OF_LONG); + objectData = new long[(int)(dataSize/SIZE_OF_LONG)]; + 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 RasMArrayLong(final RasMInterval initDomain, RasStorageLayout stl) + { + super(initDomain, SIZE_OF_LONG, stl); + objectData = new long[(int)(dataSize/SIZE_OF_LONG)]; + data = null; + } + + + /** + * copy constructor + * @param obj a copy of this object will be created + */ + public RasMArrayLong(final RasMArrayLong obj) + { + super(obj); + if(obj.objectData!=null) + { + objectData = new long[(int)(obj.dataSize/SIZE_OF_LONG)]; + System.arraycopy(obj.getLongArray(), 0, objectData, 0, (int)(obj.dataSize/SIZE_OF_LONG)); + data = null; + } + } + + /** + * subscript operator for read access of a cell. The cell value is returned + * as a byte[SIZE_OF_LONG] array. This kind of access to a cell is significantly slower + * than getLong(), because each cell value has to be converted from long to a + * byte[SIZE_OF_LONG] 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 + { + long cellValue; + long tmp; + + //first test dimensionality + if(point.dimension() != domain.dimension()) + throw new RasDimensionMismatchException(point.dimension(), domain.dimension()); + + cellValue = ((long[])objectData)[(int)domain.cellOffset(point)]; + for(int i=0; i<SIZE_OF_LONG; i++) + { + tmp = cellValue; + tmp >>>= (((SIZE_OF_LONG -1)-i)*SIZE_OF_LONG); + currentCell[i] = (byte)tmp; + } + + return currentCell; + + } + + /** subscript operator for read access of a cell. The cell value is returned as + * an long. This access method is faster then getCell(), because no conversion + * from long to Byte[SIZE_OF_LONG] has to be done. + */ + public long getLong( final RasPoint point) + throws RasDimensionMismatchException, RasIndexOutOfBoundsException + { + // first test dimensionality + if(point.dimension() != domain.dimension()) + throw new RasDimensionMismatchException(point.dimension(), domain.dimension()); + + return ((long[])objectData)[(int)domain.cellOffset(point)]; + } + + /** + * get the internal representation of the array + */ + public long[] getLongArray() + { + if(objectData==null) + { + ByteArrayInputStream bis = new ByteArrayInputStream(data); + DataInputStream dis = new DataInputStream(bis); + objectData = new long[data.length/SIZE_OF_LONG]; + try + { + for(int j=0; j<data.length/SIZE_OF_LONG; j++) + { + ((long[])objectData)[j] = dis.readLong(); + } + } + catch(IOException e) + { + throw new RasClientInternalException("RasMArrayLong", "getLongArray()", + "IOException while converting data to objectData array " + e.getMessage()); + } + } + return (long[])objectData; + } + + /** get the internal representation of the array in bytes, + * please use getLongArray() + */ + public byte[] getArray() + { + if(data==null) + { + ByteArrayOutputStream bos = new ByteArrayOutputStream(); + DataOutputStream dos = new DataOutputStream(bos); + try + { + for(int j=0; j<((long[])objectData).length; j++) + dos.writeLong(((long[])objectData)[j]); + } + catch(IOException e) + { + throw new RasClientInternalException("RasMArrayLong", "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(long[] newData) + { + objectData = newData; + data = null; + dataSize = newData.length * SIZE_OF_LONG; + } +} + |