svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.compat.cdc / org.gvsig.fmap.dal / org.gvsig.fmap.dal.file / org.gvsig.fmap.dal.file.shp / src / main / java / org / gvsig / fmap / dal / store / shp / utils / SHPFileWrite.java @ 44648
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/**
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* gvSIG. Desktop Geographic Information System.
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*
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* Copyright (C) 2007-2013 gvSIG Association.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 3
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*
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* For any additional information, do not hesitate to contact us
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* at info AT gvsig.com, or visit our website www.gvsig.com.
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*/
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package org.gvsig.fmap.dal.store.shp.utils; |
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import java.io.IOException; |
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import java.nio.Buffer; |
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import java.nio.ByteBuffer; |
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import java.nio.ByteOrder; |
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import java.nio.channels.FileChannel; |
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import org.slf4j.Logger; |
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import org.slf4j.LoggerFactory; |
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import org.gvsig.fmap.dal.exception.WriteException; |
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import org.gvsig.fmap.geom.Geometry; |
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import org.gvsig.fmap.geom.Geometry.SUBTYPES; |
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import org.gvsig.fmap.geom.GeometryLocator; |
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import org.gvsig.fmap.geom.GeometryManager; |
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import org.gvsig.fmap.geom.exception.CreateEnvelopeException; |
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import org.gvsig.fmap.geom.primitive.Envelope; |
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import org.gvsig.tools.exception.BaseException; |
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public class SHPFileWrite { |
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private static final GeometryManager geomManager = GeometryLocator.getGeometryManager(); |
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private static final Logger logger = LoggerFactory.getLogger(SHPFileWrite.class); |
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private SHPShapeWriter m_shape = null; |
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private ByteBuffer m_bb = null; |
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private ByteBuffer m_indexBuffer = null; |
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private int m_pos = 0; |
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private int m_offset; |
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private int m_type = SHP.NULL; |
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private int m_cnt; |
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private FileChannel shpChannel; |
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private FileChannel shxChannel; |
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private int inconsistenciesInGeometryTypeCounter = 0; |
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public SHPFileWrite(FileChannel shpChannel, FileChannel shxChannel) { |
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this.shpChannel = shpChannel;
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this.shxChannel = shxChannel;
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} |
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/**
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* Make sure our buffer is of size.
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*
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*/
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private void checkShapeBuffer(int size) { |
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if ( m_bb.capacity() < size ) {
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m_bb = ByteBuffer.allocateDirect(size);
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} |
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} |
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/**
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* Drain internal buffers into underlying channels.
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*
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* @throws WriteException
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*
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*/
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private void drain() throws WriteException { |
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m_bb.flip(); |
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m_indexBuffer.flip(); |
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try {
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while ( m_bb.remaining() > 0 ) { |
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shpChannel.write(m_bb); |
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} |
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while ( m_indexBuffer.remaining() > 0 ) { |
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shxChannel.write(m_indexBuffer); |
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} |
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} catch (IOException e) { |
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throw new WriteException("SHP File Write Drain", e); |
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} |
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m_bb.flip().limit(m_bb.capacity()); |
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m_indexBuffer.flip().limit(m_indexBuffer.capacity()); |
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} |
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private void allocateBuffers() { |
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m_bb = ByteBuffer.allocateDirect(16 * 1024); |
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m_indexBuffer = ByteBuffer.allocateDirect(100); |
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} |
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/**
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* Close the underlying Channels.
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*/
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public void close() throws WriteException { |
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try {
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shpChannel.close(); |
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shxChannel.close(); |
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} catch (IOException e) { |
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throw new WriteException("SHP File Write Close", e); |
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} |
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shpChannel = null;
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shxChannel = null;
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m_shape = null;
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if ( m_indexBuffer instanceof ByteBuffer ) { |
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if ( m_indexBuffer != null ) { |
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///NIOUtilities.clean(m_indexBuffer);
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} |
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} |
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if ( m_indexBuffer instanceof ByteBuffer ) { |
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if ( m_indexBuffer != null ) { |
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///NIOUtilities.clean(m_bb);
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} |
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} |
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m_indexBuffer = null;
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m_bb = null;
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} |
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private void writeHeaders(Geometry[] geometries, int type) |
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throws WriteException {
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this.m_type = type;
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this.inconsistenciesInGeometryTypeCounter = 0; |
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int fileLength = 100; |
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Envelope envelope = null;
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try {
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envelope = geomManager.createEnvelope(SUBTYPES.GEOM2D); |
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} catch (CreateEnvelopeException e) {
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logger.error("Error creating the envelope", e);
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} |
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for ( int i = geometries.length - 1; i >= 0; i-- ) { |
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Geometry fgeometry = geometries[i]; |
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try {
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m_shape.initialize(fgeometry); |
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} catch (BaseException e) {
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throw new WriteException("SHPFileWrite write headers", e); |
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} |
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int size = m_shape.getLength() + 8; |
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fileLength += size; |
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envelope.add(fgeometry.getEnvelope()); |
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} |
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writeHeaders(envelope, type, geometries.length, fileLength); |
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} |
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/**
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* Writes shape header (100 bytes)
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*/
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public void writeHeaders(Envelope bounds, int type, |
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int numberOfGeometries,
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int fileLength) throws WriteException { |
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this.m_type = type;
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this.inconsistenciesInGeometryTypeCounter = 0; |
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if ( m_bb == null ) { |
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allocateBuffers(); |
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} |
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// Posicionamos al principio.
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((Buffer)m_bb).position(0); |
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((Buffer)m_indexBuffer).position(0); |
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ShapeFileHeader2 header = new ShapeFileHeader2();
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header.write(m_bb, type, numberOfGeometries, fileLength / 2,
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bounds |
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.getMinimum(0), bounds.getMinimum(1), bounds.getMaximum(0), |
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bounds.getMaximum(1), 0, 0, 0, 0); |
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header.write(m_indexBuffer, type, numberOfGeometries, |
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50 + (4 * numberOfGeometries), bounds.getMinimum(0), bounds.getMinimum(1), |
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bounds.getMaximum(0), bounds.getMaximum(1), 0, 0, 0, 0); |
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m_offset = 50;
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m_cnt = 0;
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try {
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shpChannel.position(0);
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shxChannel.position(0);
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} catch (IOException e) { |
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throw new WriteException("SHP File Write Headers", e); |
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} |
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drain(); |
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} |
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public int writeIGeometry(Geometry g) throws WriteException { |
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if ( g == null ) { |
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m_shape = SHP.create(0);
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} else {
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int shapeType = getShapeType(g.getType(), g.getGeometryType().getSubType());
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m_shape = SHP.create(shapeType); |
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} |
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return writeGeometry(g);
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} |
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/**
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* Writes a single Geometry.
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*
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* @param g
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* @return the position of buffer (after the last geometry, it will allow
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* you to write the file size in the header.
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*/
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public synchronized int writeGeometry(Geometry g) |
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throws WriteException {
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if ( m_shape.getShapeType() != this.m_type ) { |
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if ( this.inconsistenciesInGeometryTypeCounter < 10 ) { |
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logger.warn("Saving a geometry of type '" + SHP.getTypeName(m_shape.getShapeType()) + "' in a shape of type '" + SHP.getTypeName(this.m_type) + "'."); |
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} else if ( this.inconsistenciesInGeometryTypeCounter < 11 ) { |
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logger.warn("Too many warnings. Saving a geometry of type '" + SHP.getTypeName(m_shape.getShapeType()) + "' in a shape of type '" + SHP.getTypeName(this.m_type) + "'."); |
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} |
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this.inconsistenciesInGeometryTypeCounter++;
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} |
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if ( m_bb == null ) { |
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allocateBuffers(); |
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m_offset = 50;
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m_cnt = 0;
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try {
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shpChannel.position(0);
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shxChannel.position(0);
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} catch (IOException e) { |
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throw new WriteException("SHP File Write", e); |
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} |
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} |
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m_pos = ((Buffer)m_bb).position();
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try {
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m_shape.initialize(g); |
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} catch (BaseException e) {
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throw new WriteException("SHPFileWrite write geometry", e); |
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} |
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int length = m_shape.getLength();
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// must allocate enough for shape + header (2 ints)
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checkShapeBuffer(length + 8);
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length /= 2;
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m_bb.order(ByteOrder.BIG_ENDIAN);
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m_bb.putInt(++m_cnt); |
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m_bb.putInt(length); |
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m_bb.order(ByteOrder.LITTLE_ENDIAN);
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m_bb.putInt(m_shape.getShapeType()); |
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m_shape.write(m_bb); |
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m_pos = ((Buffer)m_bb).position();
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// write to the shx
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m_indexBuffer.putInt(m_offset); |
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m_indexBuffer.putInt(length); |
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m_offset += (length + 4);
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drain(); |
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return m_pos; // Devolvemos hasta donde hemos escrito |
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} |
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/**
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* Returns a shapeType compatible with shapeFile constants from a gvSIG's
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* IGeometry type
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*
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* @param geometryType
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* @return a shapeType compatible with shapeFile constants from a gvSIG's
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* IGeometry type
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*/
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public int getShapeType(int geometryType, int geometrySubType) { |
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if ( geometrySubType == Geometry.SUBTYPES.GEOM3D || geometrySubType == Geometry.SUBTYPES.GEOM3DM ) {
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switch (geometryType) {
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case Geometry.TYPES.NULL:
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return SHP.NULL;
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case Geometry.TYPES.POINT:
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return SHP.POINT3D;
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case Geometry.TYPES.CURVE:
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case Geometry.TYPES.LINE:
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case Geometry.TYPES.MULTICURVE:
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case Geometry.TYPES.MULTILINE:
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case Geometry.TYPES.ARC:
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case Geometry.TYPES.SPLINE:
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case Geometry.TYPES.CIRCUMFERENCE:
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case Geometry.TYPES.PERIELLIPSE:
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return SHP.POLYLINE3D;
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case Geometry.TYPES.SURFACE:
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case Geometry.TYPES.POLYGON:
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case Geometry.TYPES.MULTISURFACE:
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case Geometry.TYPES.MULTIPOLYGON:
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case Geometry.TYPES.CIRCLE:
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case Geometry.TYPES.ELLIPSE:
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case Geometry.TYPES.ELLIPTICARC:
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case Geometry.TYPES.FILLEDSPLINE:
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return SHP.POLYGON3D;
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case Geometry.TYPES.MULTIPOINT:
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return SHP.MULTIPOINT3D; //TODO falta aclarar cosas aqu?. |
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} |
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} else if ( geometrySubType == Geometry.SUBTYPES.GEOM2DM ) { |
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switch (geometryType) {
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case Geometry.TYPES.NULL:
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return SHP.NULL;
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case Geometry.TYPES.POINT:
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return SHP.POINTM;
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case Geometry.TYPES.CURVE:
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case Geometry.TYPES.LINE:
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case Geometry.TYPES.MULTICURVE:
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case Geometry.TYPES.MULTILINE:
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case Geometry.TYPES.ARC:
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case Geometry.TYPES.SPLINE:
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case Geometry.TYPES.CIRCUMFERENCE:
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case Geometry.TYPES.PERIELLIPSE:
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return SHP.POLYLINEM;
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case Geometry.TYPES.SURFACE:
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case Geometry.TYPES.POLYGON:
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case Geometry.TYPES.MULTISURFACE:
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case Geometry.TYPES.MULTIPOLYGON:
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case Geometry.TYPES.CIRCLE:
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case Geometry.TYPES.ELLIPSE:
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case Geometry.TYPES.ELLIPTICARC:
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case Geometry.TYPES.FILLEDSPLINE:
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return SHP.POLYGONM;
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case Geometry.TYPES.MULTIPOINT:
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return SHP.MULTIPOINTM; //TODO falta aclarar cosas aqu?. |
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} |
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} else {
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switch (geometryType) {
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case Geometry.TYPES.POINT:
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return SHP.POINT2D;
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case Geometry.TYPES.CURVE:
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case Geometry.TYPES.LINE:
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case Geometry.TYPES.MULTICURVE:
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case Geometry.TYPES.MULTILINE:
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case Geometry.TYPES.ARC:
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case Geometry.TYPES.SPLINE:
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case Geometry.TYPES.CIRCUMFERENCE:
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case Geometry.TYPES.PERIELLIPSE:
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return SHP.POLYLINE2D;
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case Geometry.TYPES.SURFACE:
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case Geometry.TYPES.POLYGON:
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case Geometry.TYPES.MULTISURFACE:
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case Geometry.TYPES.MULTIPOLYGON:
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case Geometry.TYPES.CIRCLE:
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case Geometry.TYPES.ELLIPSE:
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case Geometry.TYPES.ELLIPTICARC:
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case Geometry.TYPES.FILLEDSPLINE:
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return SHP.POLYGON2D;
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case Geometry.TYPES.MULTIPOINT:
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return SHP.MULTIPOINT2D; //TODO falta aclarar cosas aqu?. |
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} |
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} |
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return SHP.NULL;
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} |
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} |