package aimax.osm.reader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
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.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
import aimax.osm.data.BoundingBox;
import aimax.osm.data.EntityClassifier;
import aimax.osm.data.MapBuilder;
/**
* Reads a map from file using the standard osm XML format.
* The parser is a strongly simplified version of the Osmosis osm
* file parser, written by Brett Henderson.
* @author R. Lunde
*/
public class OsmReader implements MapReader {
protected static Logger LOG = Logger.getLogger("aimax.osm");
/**
* This implementation throws an UnsupportedOperationException
.
*/
public void setFilter(BoundingBox bb) {
throw new UnsupportedOperationException();
}
/**
* This implementation throws an UnsupportedOperationException
.
*/
public void setFilter(EntityClassifier attFilter) {
throw new UnsupportedOperationException();
}
/**
* Reads all data from the file and send it to the sink.
*/
public void readMap(File file, MapBuilder builder) {
try {
parseMap(createFileStream(file), builder);
} catch (FileNotFoundException e) {
LOG.warning("File " + file + " does not exist.");
} catch (Exception e) {
LOG.warning("The map could not be read. " + e);
}
}
/**
* Reads all data from the specified stream and sends it to the consumer.
* The consumer is cleared before.
*/
public void readMap(InputStream inputStream, MapBuilder builder) {
try {
parseMap(inputStream, builder);
if (builder.nodeRefsWithoutDefsAdded())
LOG.warning("Nodes were referenced in ways but not defined before.");
} catch (SAXParseException e) {
throw new OsmRuntimeException(
"Unable to parse input stream"
+ ". publicId=(" + e.getPublicId()
+ "), systemId=(" + e.getSystemId()
+ "), lineNumber=" + e.getLineNumber()
+ ", columnNumber=" + e.getColumnNumber() + ".",
e);
} catch (SAXException e) {
throw new OsmRuntimeException("Unable to parse XML.", e);
} catch (IOException e) {
throw new OsmRuntimeException("Unable to read XML input stream.", e);
} finally {
if (inputStream != null) {
try {
inputStream.close();
} catch (IOException e) {
LOG.log(Level.SEVERE, "Unable to close input stream.", e);
}
}
}
}
protected void parseMap(InputStream inputStream, MapBuilder consumer)
throws SAXException, IOException {
SAXParser parser = createParser();
parser.parse(inputStream, new OsmHandler(consumer));
}
public String[] fileFormatDescriptions() {
return new String[] {"OSM File (osm)"};
}
public String[] fileFormatExtensions() {
return new String[] {"osm"};
}
/**
* Factory method, responsible for creating an input stream for a
* specified file.
*/
protected InputStream createFileStream(File file) throws Exception {
return new FileInputStream(file);
}
/**
* Factory method, responsible for creating a new SAX parser.
*/
protected SAXParser createParser() {
try {
return SAXParserFactory.newInstance().newSAXParser();
} catch (ParserConfigurationException e) {
throw new OsmRuntimeException("Unable to create SAX Parser.", e);
} catch (SAXException e) {
throw new OsmRuntimeException("Unable to create SAX Parser.", e);
}
}
}