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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.document.annotation;
import com.google.common.collect.Multimap;
import com.google.common.collect.Multimaps;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.IdentityHashMap;
import java.util.Iterator;
import java.util.List;
/**
* TODO: Should this be removed?
*
* @author Einar M R Rosenvinge
*/
class SpanNode2AnnotationContainer extends AnnotationContainer {
private final Multimap<SpanNode, Annotation> spanNode2Annotation = Multimaps.newMultimap(new IdentityHashMap<>(), ArrayList::new);
@Override
void annotateAll(Collection<Annotation> annotations) {
for (Annotation a : annotations) {
annotate(a);
}
}
@Override
void annotate(Annotation a) {
if (a.getSpanNode() == null) {
spanNode2Annotation.put(DummySpanNode.INSTANCE, a);
} else {
spanNode2Annotation.put(a.getSpanNode(), a);
}
}
@Override
@SuppressWarnings("unchecked")
Collection<Annotation> annotations() {
return spanNode2Annotation.values();
}
@Override
@SuppressWarnings("unchecked")
Iterator<Annotation> iterator(SpanNode node) {
Collection<Annotation> annotationsForNode = spanNode2Annotation.get(node);
if (annotationsForNode == null) {
return Collections.<Annotation>emptyList().iterator();
}
return annotationsForNode.iterator(); }
@Override
@SuppressWarnings("unchecked")
Iterator<Annotation> iteratorRecursive(SpanNode node) {
IdentityHashMap<SpanNode, SpanNode> nodes = new IdentityHashMap<SpanNode, SpanNode>();
nodes.put(node, node);
{
Iterator<SpanNode> childrenIt = node.childIteratorRecursive();
while (childrenIt.hasNext()) {
SpanNode child = childrenIt.next();
nodes.put(child, child);
}
}
List<Collection<Annotation>> annotationLists = new ArrayList<Collection<Annotation>>(nodes.size());
for (SpanNode includedNode : nodes.keySet()) {
Collection<Annotation> includedAnnotations = spanNode2Annotation.get(includedNode);
if (includedAnnotations != null) {
annotationLists.add(includedAnnotations);
}
}
return new AnnotationCollectionIterator(annotationLists);
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (!(o instanceof SpanNode2AnnotationContainer)) return false;
SpanNode2AnnotationContainer that = (SpanNode2AnnotationContainer) o;
if (!spanNode2Annotation.equals(that.spanNode2Annotation)) return false;
return true;
}
@Override
public int hashCode() {
return spanNode2Annotation.hashCode();
}
private class AnnotationCollectionIterator implements Iterator<Annotation> {
private final List<Collection<Annotation>> annotationLists;
private Iterator<Annotation> currentIterator;
private boolean nextCalled = false;
AnnotationCollectionIterator(List<Collection<Annotation>> annotationLists) {
this.annotationLists = annotationLists;
if (annotationLists.isEmpty()) {
currentIterator = Collections.<Annotation>emptyList().iterator();
} else {
currentIterator = annotationLists.remove(0).iterator();
}
}
@Override
public boolean hasNext() {
nextCalled = false;
if (currentIterator.hasNext()) {
return true;
}
if (annotationLists.isEmpty()) {
return false;
}
currentIterator = annotationLists.remove(0).iterator();
return hasNext();
}
@Override
public Annotation next() {
if (hasNext()) {
nextCalled = true;
return currentIterator.next();
}
return null;
}
@Override
public void remove() {
if (nextCalled) {
currentIterator.remove();
} else {
throw new IllegalStateException();
}
}
}
}
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