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PojoImplicitReindexingResolverContainerElementNode.java
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PojoImplicitReindexingResolverContainerElementNode.java
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/*
* Hibernate Search, full-text search for your domain model
*
* License: GNU Lesser General Public License (LGPL), version 2.1 or later
* See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
*/
package org.hibernate.search.mapper.pojo.dirtiness.impl;
import java.util.Collection;
import java.util.stream.Stream;
import org.hibernate.search.mapper.pojo.extractor.impl.ContainerValueExtractorHolder;
import org.hibernate.search.mapper.pojo.model.spi.PojoRuntimeIntrospector;
import org.hibernate.search.util.impl.common.Closer;
import org.hibernate.search.util.impl.common.ToStringTreeBuilder;
/**
* A {@link PojoImplicitReindexingResolverNode} dealing with a specific container type,
* extracting values from the container then applying nested resolvers to the values.
* <p>
* This node will only delegate to nested nodes for deeper resolution,
* and will never contribute entities to reindex directly.
* At the time of writing, nested nodes are always type nodes,
* but we might allow other nodes in the future for optimization purposes.
*
* @param <C> The container type received as input, for instance {@code Map<String, Collection<MyEntityType>>}.
* @param <S> The expected type of the object describing the "dirtiness state".
* @param <V> The extracted value type, for instance {@code MyEntityType}.
*/
public class PojoImplicitReindexingResolverContainerElementNode<C, S, V>
extends PojoImplicitReindexingResolverNode<C, S> {
private final ContainerValueExtractorHolder<C, V> extractorHolder;
private final Collection<PojoImplicitReindexingResolverNode<V, S>> nestedNodes;
public PojoImplicitReindexingResolverContainerElementNode(ContainerValueExtractorHolder<C, V> extractorHolder,
Collection<PojoImplicitReindexingResolverNode<V, S>> nestedNodes) {
this.extractorHolder = extractorHolder;
this.nestedNodes = nestedNodes;
}
@Override
public void close() {
try ( Closer<RuntimeException> closer = new Closer<>() ) {
closer.push( ContainerValueExtractorHolder::close, extractorHolder );
closer.pushAll( PojoImplicitReindexingResolverNode::close, nestedNodes );
}
}
@Override
public void appendTo(ToStringTreeBuilder builder) {
builder.attribute( "class", getClass().getSimpleName() );
builder.attribute( "extractor", extractorHolder.get() );
builder.startList( "nestedNodes" );
for ( PojoImplicitReindexingResolverNode<?, ?> nestedNode : nestedNodes ) {
builder.value( nestedNode );
}
builder.endList();
}
@Override
public void resolveEntitiesToReindex(PojoReindexingCollector collector,
PojoRuntimeIntrospector runtimeIntrospector, C dirty, S dirtinessState) {
try ( Stream<V> stream = extractorHolder.get().extract( dirty ) ) {
stream.forEach( containerElement -> resolveEntitiesToReindexForContainerElement(
collector, runtimeIntrospector, containerElement, dirtinessState
) );
}
}
private void resolveEntitiesToReindexForContainerElement(PojoReindexingCollector collector,
PojoRuntimeIntrospector runtimeIntrospector, V containerElement, S dirtinessState) {
if ( containerElement != null ) {
for ( PojoImplicitReindexingResolverNode<V, S> node : nestedNodes ) {
node.resolveEntitiesToReindex( collector, runtimeIntrospector, containerElement, dirtinessState );
}
}
}
}