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MetaCursor.java
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Fri, Sep 13, 09:31

MetaCursor.java
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package mpicbg.imglib.cursor.special;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import mpicbg.imglib.container.Container;
import mpicbg.imglib.cursor.Cursor;
import mpicbg.imglib.cursor.Iterable;
import mpicbg.imglib.image.Image;
import mpicbg.imglib.type.Type;
/**
* Represents a cursor that could be used to drive an arbitrary number
* of other cursors.
*
* @author Dan White & Tom Kazimiers
*/
public abstract class MetaCursor< T extends Type< T > > implements Cursor<T>
{
// the list of cursors that is driven by this class
List<Cursor<T>> cursors = new ArrayList<Cursor<T>>();
public MetaCursor(Collection<Cursor<T>> cursors){
if (cursors.contains(null))
throw new IllegalArgumentException("At least one cursor is null");
this.cursors.addAll(cursors);
}
/**
* Calls fwd() on all managed cursors.
*/
public void fwd() {
for(Cursor<T> c : cursors)
c.fwd();
}
/**
* Gets the logical And-Operation of all cursors hasNext() that are
* driven by this MetaCursor.
*/
public boolean hasNext() {
boolean hasNext = true;
for(Cursor<T> c : cursors)
hasNext &= c.hasNext();
return hasNext;
}
/**
* Calls fwd(long arg) on all managed cursors.
*/
public void fwd(long arg) {
for(Cursor<T> c : cursors)
c.fwd(arg);
}
/**
* Calls reset() on all managed cursors.
*/
public void reset() {
for(Cursor<T> c : cursors)
c.reset();
}
/**
* Calls close() on all managed cursors.
*/
public void close() {
for(Cursor<T> c : cursors)
c.close();
}
@Override
public void setDebug( final boolean debug ) {
for(Cursor<T> c : cursors)
c.setDebug( debug );
}
@Override
public boolean isActive() {
boolean isActive = true;
for(Cursor<T> c : cursors)
isActive &= c.isActive();
return isActive;
}
@Override
public void remove()
{
for(Cursor<T> c : cursors)
c.remove();
}
/**
* Gets the Type of the specified cursor.
*/
public T getType(int index) {
return cursors.get(index).getType();
}
public T next() {
fwd();
return getType();
}
}

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