// This software is released into the Public Domain. See copying.txt for details.
package org.openstreetmap.osmosis.xml.v0_6;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Collections;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.openstreetmap.osmosis.core.OsmosisRuntimeException;
import org.openstreetmap.osmosis.core.task.v0_6.ChangeSink;
import org.openstreetmap.osmosis.core.task.v0_6.RunnableChangeSource;
import org.openstreetmap.osmosis.xml.common.CompressionActivator;
import org.openstreetmap.osmosis.xml.common.CompressionMethod;
import org.openstreetmap.osmosis.xml.v0_6.impl.OsmChangeHandler;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
/**
* A change source reading from an xml file. The entire contents of the file
* are read.
*
* @author Brett Henderson
*/
public class XmlChangeReader implements RunnableChangeSource {
private static Logger log = Logger.getLogger(XmlReader.class.getName());
private ChangeSink changeSink;
private File file;
private boolean enableDateParsing;
private CompressionMethod compressionMethod;
/**
* Creates a new instance.
*
* @param file
* The file to read.
* @param enableDateParsing
* If true, dates will be parsed from xml data, else the current
* date will be used thus saving parsing time.
* @param compressionMethod
* Specifies the compression method to employ.
*/
public XmlChangeReader(File file, boolean enableDateParsing, CompressionMethod compressionMethod) {
this.file = file;
this.enableDateParsing = enableDateParsing;
this.compressionMethod = compressionMethod;
}
/**
* {@inheritDoc}
*/
public void setChangeSink(ChangeSink changeSink) {
this.changeSink = changeSink;
}
/**
* Creates a new SAX parser.
*
* @return The newly created SAX parser.
*/
private SAXParser createParser() {
try {
return SAXParserFactory.newInstance().newSAXParser();
} catch (ParserConfigurationException e) {
throw new OsmosisRuntimeException("Unable to create SAX Parser.", e);
} catch (SAXException e) {
throw new OsmosisRuntimeException("Unable to create SAX Parser.", e);
}
}
/**
* Reads all data from the file and send it to the sink.
*/
public void run() {
InputStream inputStream = null;
try {
SAXParser parser;
changeSink.initialize(Collections.<String, Object>emptyMap());
// make "-" an alias for /dev/stdin
if (file.getName().equals("-")) {
inputStream = System.in;
} else {
inputStream = new FileInputStream(file);
}
inputStream =
new CompressionActivator(compressionMethod).
createCompressionInputStream(inputStream);
parser = createParser();
parser.parse(inputStream, new OsmChangeHandler(changeSink, enableDateParsing));
changeSink.complete();
} catch (SAXParseException e) {
throw new OsmosisRuntimeException(
"Unable to parse xml file " + file
+ ". publicId=(" + e.getPublicId()
+ "), systemId=(" + e.getSystemId()
+ "), lineNumber=" + e.getLineNumber()
+ ", columnNumber=" + e.getColumnNumber() + ".",
e);
} catch (SAXException e) {
throw new OsmosisRuntimeException("Unable to parse XML.", e);
} catch (IOException e) {
throw new OsmosisRuntimeException("Unable to read XML file " + file + ".", e);
} finally {
changeSink.release();
if (inputStream != null) {
try {
inputStream.close();
} catch (IOException e) {
log.log(Level.SEVERE, "Unable to close input stream.", e);
}
inputStream = null;
}
}
}
}