private void parseProperties() throws IOException {
String line;
stream.seek(0);
propertiesByteSize = 0;
long posInStream = 0l;
while ((line = stream.readLine()) != null) {
if (!line.startsWith("#")) {
stream.seek(posInStream);
break;
}
propertiesByteSize += (stream.getStreamPosition() - posInStream);
posInStream = stream.getStreamPosition();
line = line.substring(1);
int pos = line.indexOf('=');
if (pos == -1) {
throw new IOException("Missing '=' in '" + line + "'");
}
String name = line.substring(0, pos).trim();
if (name.isEmpty()) {
throw new IOException("Empty property name in '" + line + "'");
}
String value = line.substring(pos + 1).trim();
try {
if (contains(Constants.CRS_IDENTIFIERS, name) && crs != null) {
crs = CRS.parseWKT(value);
}
} catch (FactoryException e) {
throw new IOException(e);
}
properties.put(name, value);
}
propertiesParsed = true;
}
private void skipToLine(long lineOffset) throws IOException {
if (bytePositionForOffset.containsKey(lineOffset)) {
stream.seek(bytePositionForOffset.get(lineOffset));
return;
}
Map.Entry<Long, Long> entry = getBestOffset(lineOffset);
stream.seek(entry.getValue());
long linesToSkip = lineOffset - entry.getKey();
for (int i = 0; i < linesToSkip; i++) {
stream.readLine();
}
bytePositionForOffset.put(lineOffset, stream.getStreamPosition());
}
@Override
public void checkReadingFirstRecord() throws IOException {
skipToLine(0);
final String line = stream.readLine();
final String[] tokens = getTokens(line);
for (int i = 0; i < converters.length; i++) {
Converter<?> converter = converters[i];
try {
converter.parse(tokens[i + (hasFeatureId ? 1 : 0)]);
} catch (ConversionException e) {
throw new IOException(e);
}
}
}
@Override
public void parseRecords(int offset, int numRecords) throws IOException {
featureCollection = new ListFeatureCollection(simpleFeatureType);
SimpleFeatureBuilder builder = new SimpleFeatureBuilder(simpleFeatureType);
skipToLine(offset);
String line;
long featureCount = offset;
while ((numRecords == -1 || featureCount < offset + numRecords)
&& (line = stream.readLine()) != null) {
String[] tokens = getTokens(line);
if (tokens == null) {
break;
}
int expectedTokenCount = simpleFeatureType.getAttributeCount();
expectedTokenCount += hasFeatureId ? 1 : 0;
if (tokens.length != expectedTokenCount) {
continue;
}
builder.reset();
String featureId = "" + featureCount++;
for (int i = 0; i < tokens.length; i++) {
String token = tokens[i];
if (i == 0 && hasFeatureId) {
featureId = token;
} else {
try {
Object value = null;
int currentIndex = i;
currentIndex -= hasFeatureId ? 1 : 0;
if (!VectorDataNodeIO.NULL_TEXT.equals(token)) {
value = converters[currentIndex].parse(token);
}
builder.set(simpleFeatureType.getDescriptor(currentIndex).getLocalName(), value);
} catch (ConversionException e) {
BeamLogManager.getSystemLogger()
.warning(String.format("Problem in '%s': %s", csv.getPath(), e.getMessage()));
}
}
}
SimpleFeature simpleFeature = builder.buildFeature(featureId);
featureCollection.add(simpleFeature);
bytePositionForOffset.put(featureCount, stream.getStreamPosition());
}
recordsParsed = true;
}
@Override
public Object[] parseRecords(final int offset, final int numRecords, final String rowName)
throws IOException {
AttributeDescriptor attributeDescriptor = simpleFeatureType.getDescriptor(rowName);
int expectedTokenCount = simpleFeatureType.getAttributeCount();
expectedTokenCount += hasFeatureId ? 1 : 0;
int rowIndex = simpleFeatureType.getAttributeDescriptors().indexOf(attributeDescriptor);
int tokenIndex = rowIndex + (hasFeatureId ? 1 : 0);
List<Object> values = new ArrayList<>(numRecords);
skipToLine(offset);
String line;
long featureCount = offset;
while ((numRecords == -1 || featureCount < offset + numRecords)
&& (line = stream.readLine()) != null) {
String[] tokens = getTokens(line);
if (tokens == null) {
break;
}
if (tokens.length != expectedTokenCount) {
continue;
}
featureCount++;
String token = tokens[tokenIndex];
try {
Object value = null;
if (!VectorDataNodeIO.NULL_TEXT.equals(token)) {
value = converters[rowIndex].parse(token);
}
values.add(value);
} catch (ConversionException e) {
BeamLogManager.getSystemLogger()
.warning(String.format("Problem in '%s': %s", csv.getPath(), e.getMessage()));
}
bytePositionForOffset.put(featureCount, stream.getStreamPosition());
}
return values.toArray();
}
private void parseHeader() throws IOException {
if (!propertiesParsed) {
throw new IllegalStateException("Properties need to be parsed before header.");
}
stream.seek(propertiesByteSize);
String line;
long posInStream = stream.getStreamPosition();
while ((line = stream.readLine()) != null) {
if (line.startsWith("#")) {
propertiesByteSize += (stream.getStreamPosition() - posInStream);
posInStream = stream.getStreamPosition();
continue;
}
headerByteSize += (stream.getStreamPosition() - posInStream);
final String separator =
properties.get("separator") != null
? properties.get("separator")
: Constants.DEFAULT_SEPARATOR;
createFeatureType(line.split(separator));
break;
}
}
@Override
public String readLine() throws IOException {
return iis.readLine();
}