/*
* 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.util.message;
import static org.mule.runtime.core.util.message.MessageUtils.toMessage;
import org.mule.runtime.api.message.Message;
import org.mule.runtime.api.metadata.MediaType;
import org.mule.runtime.core.api.Event;
import org.mule.runtime.core.streaming.CursorProviderFactory;
import org.mule.runtime.extension.api.runtime.operation.Result;
import java.util.Iterator;
import java.util.function.Consumer;
/**
* Wraps an {@link Iterator} of {@link Result} instances and exposes
* its contents as {@link Message} instances.
*
* This allows to avoid preemptive transformations of an entire collection
* of {@link Result} to {@link Message}
*
* @since 4.0
*/
final class ResultToMessageIterator implements Iterator<Message> {
private final Iterator<Result> delegate;
private final MediaType mediaType;
private final CursorProviderFactory cursorProviderFactory;
private final Event event;
ResultToMessageIterator(Iterator<Result> delegate,
MediaType mediaType,
CursorProviderFactory cursorProviderFactory,
Event event) {
this.delegate = delegate;
this.mediaType = mediaType;
this.cursorProviderFactory = cursorProviderFactory;
this.event = event;
}
@Override
public boolean hasNext() {
return delegate.hasNext();
}
@Override
public Message next() {
return toMessage(delegate.next(), mediaType, cursorProviderFactory, event);
}
@Override
public void remove() {
delegate.remove();
}
@Override
public void forEachRemaining(Consumer<? super Message> action) {
delegate.forEachRemaining(result -> action.accept(toMessage(result, mediaType, cursorProviderFactory, event)));
}
}