// This software is released into the Public Domain. See copying.txt for details.
package org.openstreetmap.osmosis.core.tee.v0_6;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import org.openstreetmap.osmosis.core.OsmosisRuntimeException;
import org.openstreetmap.osmosis.core.container.v0_6.EntityContainer;
import org.openstreetmap.osmosis.core.task.v0_6.Sink;
import org.openstreetmap.osmosis.core.task.v0_6.SinkMultiSource;
import org.openstreetmap.osmosis.core.task.v0_6.SinkSource;
import org.openstreetmap.osmosis.core.task.v0_6.Source;
/**
* Sends input data to two output destinations.
*
* @author Brett Henderson
*/
public class EntityTee implements SinkMultiSource {
private List<ProxySinkSource> sinkList;
/**
* Creates a new instance.
*
* @param outputCount
* The number of output destinations to write to.
*/
public EntityTee(int outputCount) {
sinkList = new ArrayList<ProxySinkSource>();
for (int i = 0; i < outputCount; i++) {
sinkList.add(new ProxySinkSource());
}
}
/**
* {@inheritDoc}
*/
public Source getSource(int index) {
if (index < 0 || index >= sinkList.size()) {
throw new OsmosisRuntimeException("Source index " + index
+ " is in the range 0 to " + (sinkList.size() - 1) + ".");
}
return sinkList.get(index);
}
/**
* {@inheritDoc}
*/
public int getSourceCount() {
return sinkList.size();
}
/**
* {@inheritDoc}
*/
public void initialize(Map<String, Object> metaData) {
for (ProxySinkSource sink : sinkList) {
sink.initialize(metaData);
}
}
/**
* {@inheritDoc}
*/
public void process(EntityContainer entityContainer) {
for (ProxySinkSource sink : sinkList) {
// We're passing the data to multiple downstream tasks therefore should make the entity
// read-only to prevent multiple threads impacting each other.
entityContainer.getEntity().makeReadOnly();
sink.process(entityContainer);
}
}
/**
* {@inheritDoc}
*/
public void complete() {
for (ProxySinkSource sink : sinkList) {
sink.complete();
}
}
/**
* {@inheritDoc}
*/
public void close() {
for (ProxySinkSource sink : sinkList) {
sink.close();
}
}
/**
* Instances of this class are returned via the parent class getSource method.
*
* @author Brett Henderson
*/
private static class ProxySinkSource implements SinkSource {
private Sink sink;
/**
* Creates a new instance.
*/
public ProxySinkSource() {
// Nothing to do.
}
/**
* {@inheritDoc}
*/
public void setSink(Sink sink) {
this.sink = sink;
}
/**
* {@inheritDoc}
*/
public void initialize(Map<String, Object> metaData) {
sink.initialize(metaData);
}
/**
* {@inheritDoc}
*/
public void process(EntityContainer entityContainer) {
sink.process(entityContainer);
}
/**
* {@inheritDoc}
*/
public void complete() {
sink.complete();
}
/**
* {@inheritDoc}
*/
public void close() {
sink.close();
}
}
}