// This software is released into the Public Domain. See copying.txt for details.
package org.openstreetmap.osmosis.core.bound.v0_6;
import java.util.Map;
import org.openstreetmap.osmosis.core.container.v0_6.BoundContainer;
import org.openstreetmap.osmosis.core.container.v0_6.EntityContainer;
import org.openstreetmap.osmosis.core.domain.v0_6.Bound;
import org.openstreetmap.osmosis.core.domain.v0_6.EntityType;
import org.openstreetmap.osmosis.core.task.v0_6.Sink;
import org.openstreetmap.osmosis.core.task.v0_6.SinkSource;
/**
* Ensures the bound entity in the output stream exists with a specific value or
* is not present.
*
* @author Igor Podolskiy
*/
public class BoundSetter implements SinkSource {
private Sink sink;
private boolean boundProcessed;
private Bound newBound;
/**
* Creates a new instance of the bound setter.
*
* @param newBound
* the new bound to set, or <pre>null</pre> to remove the bound
*/
public BoundSetter(Bound newBound) {
this.newBound = newBound;
this.boundProcessed = false;
}
@Override
public void initialize(Map<String, Object> metaTags) {
sink.initialize(metaTags);
}
@Override
public void process(EntityContainer entityContainer) {
if (boundProcessed) {
sink.process(entityContainer);
} else {
// processFirstEntity will send all data downstream as needed
processFirstEntity(entityContainer);
boundProcessed = true;
}
}
private void processFirstEntity(EntityContainer entityContainer) {
if (entityContainer.getEntity().getType() == EntityType.Bound) {
if (newBound == null) {
// Just returning won't pass the entity downstream
return;
} else {
sink.process(new BoundContainer(newBound));
}
} else {
if (newBound != null) {
sink.process(new BoundContainer(newBound));
}
sink.process(entityContainer);
}
}
@Override
public void complete() {
sink.complete();
}
@Override
public void release() {
sink.release();
}
@Override
public void setSink(Sink sink) {
this.sink = sink;
}
}