root / trunk / libraries / libFMap / src / com / iver / cit / gvsig / fmap / layers / VectorialFileAdapter.java @ 1773
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/* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana
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*
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* Copyright (C) 2004 IVER T.I. and Generalitat Valenciana.
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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 2
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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., 59 Temple Place - Suite 330, Boston, MA 02111-1307,USA.
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*
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* For more information, contact:
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*
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* Generalitat Valenciana
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* Conselleria d'Infraestructures i Transport
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* Av. Blasco Ib??ez, 50
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* 46010 VALENCIA
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* SPAIN
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*
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* +34 963862235
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* gvsig@gva.es
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* www.gvsig.gva.es
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*
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* or
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*
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* IVER T.I. S.A
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* Salamanca 50
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* 46005 Valencia
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* Spain
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*
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* +34 963163400
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* dac@iver.es
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*/
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package com.iver.cit.gvsig.fmap.layers; |
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import com.hardcode.driverManager.DriverLoadException; |
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import com.hardcode.gdbms.engine.data.DataSource; |
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import com.hardcode.gdbms.engine.data.DataSourceFactory; |
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import com.hardcode.gdbms.engine.data.FileDriver; |
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import com.hardcode.gdbms.engine.data.NoSuchTableException; |
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import com.hardcode.gdbms.engine.data.ReadDriver; |
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import com.iver.cit.gvsig.fmap.DriverException; |
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import com.iver.cit.gvsig.fmap.core.IGeometry; |
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import com.iver.cit.gvsig.fmap.drivers.DriverIOException; |
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import com.iver.cit.gvsig.fmap.drivers.ExternalData; |
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import com.iver.cit.gvsig.fmap.drivers.VectorialFileDriver; |
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import com.iver.cit.gvsig.fmap.rendering.indexes.Index; |
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import com.iver.cit.gvsig.fmap.rendering.indexes.IndexNotExistsException; |
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import com.iver.cit.gvsig.fmap.write.FileWriterDriver; |
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import java.awt.geom.Rectangle2D; |
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import java.io.File; |
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import java.io.IOException; |
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/**
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* Adapta un driver de fichero vectorial a la interfaz vectorial, manteniendo
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* adem?s el estado necesario por una capa vectorial de fichero (el nombre del
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* fichero)
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*/
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public class VectorialFileAdapter extends VectorialAdapter implements Index { |
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private boolean driverInitialized = false; |
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private File file; |
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private FileWriterDriver writeDriver;
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private DataSource ds; |
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private String dataSourceName; |
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/**
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* <code>reference_count</code> lleva un contador de referencias a este
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* adaptador, de forma que si la cuenta de referencias no es cero, no
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* abrimos otra vez el adaptador porque se supone que est? abierto.
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*/
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private int reference_count = 0; |
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/**
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* Crea un nuevo VectorialFileAdapter.
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*
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* @param file Fichero.
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*/
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public VectorialFileAdapter(File file) { |
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this.file = file;
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} |
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/**
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* Devuelve driver.
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*
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* @return VectorialFileDriver.
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*/
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private VectorialFileDriver getFileDriver() {
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return (VectorialFileDriver) getDriver();
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} |
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/**
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* incrementa el contador de las veces que se ha abierto el fichero.
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* Solamente cuando el contador est? a cero pide al driver que abra el
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* fichero
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*
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* @throws DriverIOException
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*/
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public void start() throws DriverIOException { |
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try {
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if (reference_count == 0) |
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{
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getFileDriver().open(file); |
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if (!driverInitialized) {
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getFileDriver().initialize(); |
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driverInitialized = true;
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} |
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} |
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reference_count++; |
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} catch (IOException e) { |
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throw new DriverIOException(e); |
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} |
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} |
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/**
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* decrementa el contador de n?mero de aperturas y cuando llega a cero pide
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* al driver que cierre el fichero
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*
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* @throws DriverIOException
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*/
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public void stop() throws DriverIOException { |
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try {
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if (reference_count == 0) |
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{
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getFileDriver().close(); |
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} |
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else
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if (reference_count < 0) |
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throw new RuntimeException("Contador de referencias de driver =" |
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+ reference_count + ". Demasiados stop().");
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reference_count--; |
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} catch (IOException e) { |
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throw new DriverIOException(e); |
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} |
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} |
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/**
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* @see com.iver.cit.gvsig.fmap.layers.ReadableVectorial#getShape(int)
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*/
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public IGeometry getShape(int index) throws DriverIOException { |
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try {
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return getFileDriver().getShape(index);
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} catch (IOException e) { |
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throw new DriverIOException(e); |
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} |
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} |
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/**
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* @see com.iver.cit.gvsig.fmap.layers.ReadableVectorial#getShapeCount()
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*/
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public int getShapeCount() throws DriverIOException { |
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try {
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return getFileDriver().getShapeCount();
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} catch (IOException e) { |
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throw new DriverIOException(e); |
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} |
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} |
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/**
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* @see com.iver.cit.gvsig.fmap.layers.ReadableVectorial#getFullExtent()
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*/
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public Rectangle2D getFullExtent() throws DriverIOException { |
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try {
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return (Rectangle2D)getFileDriver().getFullExtent().clone(); |
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} catch (IOException e) { |
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throw new DriverIOException(e); |
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} |
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} |
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/**
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* @see com.iver.cit.gvsig.fmap.rendering.indexes.Index#getRecordIndexes(java.awt.geom.Rectangle2D)
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*/
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public int[] getRecordIndexes(Rectangle2D rect) |
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throws DriverIOException, IndexNotExistsException {
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//TODO implementar bien
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return null; |
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} |
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/**
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* @see com.iver.cit.gvsig.fmap.layers.ReadableVectorial#getShapeType()
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*/
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public int getShapeType() throws DriverIOException { |
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return getFileDriver().getShapeType();
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} |
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/**
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* @see com.iver.cit.gvsig.fmap.layers.VectorialAdapter#getRecordset()
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*/
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public DataSource getRecordset(String name) throws DriverLoadException { |
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try {
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if (ds == null) { |
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VectorialFileDriver driver = (VectorialFileDriver) getDriver(); |
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if (driver instanceof ExternalData) { |
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ExternalData ed = (ExternalData) driver; |
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File dataFile = ed.getDataFile(file);
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String driverName = ed.getDataDriverName();
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LayerFactory.getDataSourceFactory().addFileDataSource(driverName, name, |
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dataFile.getAbsolutePath(), file.getAbsolutePath()); |
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ds = LayerFactory.getDataSourceFactory().createRandomDataSource(name); |
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} else if (driver instanceof ReadDriver) { |
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LayerFactory.getDataSourceFactory().addDataSource((ReadDriver)driver, name); |
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ds = LayerFactory.getDataSourceFactory().createRandomDataSource(name); |
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} else {
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return null; |
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} |
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} |
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} catch (NoSuchTableException e) {
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throw new RuntimeException( |
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"Error de implementaci?n, se ha a?adido una tabla y luego esa tabla no ha podido ser cargada");
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} |
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return ds;
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} |
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/**
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* Devuelve el fichero.
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*
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* @return Fichero.
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*/
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public File getFile() { |
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return file;
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} |
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} |