svn-gvsig-desktop / trunk / libraries / libGDBMS / src / com / hardcode / gdbms / engine / data / file / FileDataSourceAdapter.java @ 1956
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package com.hardcode.gdbms.engine.data.file; |
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import com.hardcode.gdbms.engine.data.driver.DriverCommons; |
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import com.hardcode.gdbms.engine.data.driver.DriverException; |
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import com.hardcode.gdbms.engine.data.driver.DriverInfo; |
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import com.hardcode.gdbms.engine.data.driver.FileDriver; |
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import com.hardcode.gdbms.engine.data.driver.ReadAccess; |
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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 la interfaz FileDriver a la interfaz DataSource
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*
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* @author Fernando Gonz?lez Cort?s
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*/
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class FileDataSourceAdapter extends AbstractFileDataSource implements FileDataSource { |
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private File file; |
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private FileDriver driver;
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private int sem = 0; |
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/**
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* @see com.hardcode.gdbms.engine.data.DataSource#start()
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*/
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public void start() throws DriverException { |
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try {
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if (sem == 0) { |
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driver.open(file); |
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if (driver instanceof DriverCommons) { |
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((DriverCommons) driver).setDataSourceFactory(getDataSourceFactory()); |
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} |
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} |
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sem++; |
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} catch (IOException e) { |
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throw new DriverException(e); |
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} |
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} |
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/**
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* @see com.hardcode.gdbms.engine.data.DataSource#stop()
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*/
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public void stop() throws DriverException { |
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try {
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sem--; |
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if (sem == 0) { |
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driver.close(); |
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} else if (sem < 0) { |
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throw new RuntimeException("DataSource closed too many times"); |
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} |
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} catch (IOException e) { |
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throw new DriverException(e); |
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} |
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} |
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/**
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* Asigna el driver al adaptador
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*
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* @param driver The driver to set.
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*/
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public void setDriver(FileDriver driver) { |
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this.driver = driver;
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} |
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/**
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* Sets the source information of the DataSource
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*
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* @param sourceInfo The file to set.
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*/
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public void setSourceInfo(DriverInfo sourceInfo) { |
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super.setSourceInfo(sourceInfo);
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file = new File(((FileDriverInfo) sourceInfo).file); |
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} |
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/**
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* @see com.hardcode.gdbms.engine.data.DataSource#getDriver()
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*/
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public ReadAccess getReadDriver() {
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return driver;
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} |
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/**
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* @see com.hardcode.gdbms.engine.data.file.AbstractFileDataSource#getDriverInfo()
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*/
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public DriverCommons getDriverInfo() {
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if (driver instanceof DriverCommons) { |
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return (DriverCommons) driver;
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} else {
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return null; |
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} |
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} |
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/**
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* @see com.hardcode.gdbms.engine.data.DataSource#getDBMS()
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*/
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public String getDBMS() { |
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return sourceInfo.dbms;
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} |
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/**
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* @see com.hardcode.gdbms.engine.data.DataSource#getName()
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*/
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public String getName() { |
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return sourceInfo.name;
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} |
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} |