/*
* Copyright (c) MuleSoft, Inc. All rights reserved. http://www.mulesoft.com
* The software in this package is published under the terms of the CPAL v1.0
* license, a copy of which has been included with this distribution in the
* LICENSE.txt file.
*/
package org.mule.runtime.core.internal.streaming.object.factory;
import org.mule.runtime.api.streaming.object.CursorIterator;
import org.mule.runtime.core.api.Event;
import org.mule.runtime.core.internal.streaming.CursorManager;
import org.mule.runtime.core.internal.streaming.object.iterator.StreamingIterator;
import org.mule.runtime.core.streaming.object.CursorIteratorProviderFactory;
import java.util.Iterator;
/**
* Base implementation of {@link CursorIteratorProviderFactory} which contains all the base behaviour and template
* methods.
* <p>
* It interacts with the {@link CursorManager} in order to track all allocated resources and make
* sure they're properly disposed of once they're no longer necessary.
*
* @since 4.0
*/
public abstract class AbstractCursorIteratorProviderFactory implements CursorIteratorProviderFactory {
/**
* {@inheritDoc}
*/
@Override
public final Object of(Event event, Iterator iterator) {
if (iterator instanceof CursorIterator) {
return ((CursorIterator) iterator).getProvider();
}
return resolve(iterator, event);
}
/**
* Implementations should use this method to actually create the output value
*
* @param iterator the streaming iterator
* @param event the event on which streaming is happening
*/
protected abstract Object resolve(Iterator iterator, Event event);
/**
* {@inheritDoc}
*
* @return {@code true} if the {@code value} is a {@link StreamingIterator}
*/
@Override
public boolean accepts(Object value) {
return value instanceof StreamingIterator;
}
}