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/*******************************************************************************
* Copyright (c) 2009, 2017 Cloudsmith Inc. and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* Cloudsmith Inc. - initial API and implementation
*******************************************************************************/
package org.eclipse.equinox.internal.p2.metadata.expression;
import java.util.Iterator;
import org.eclipse.equinox.p2.metadata.expression.IEvaluationContext;
/**
* An expression that yields a new collection consisting of all elements of the
* <code>collection</code> for which the <code>filter</code> yields <code>true</code>.
*/
final class Flatten extends UnaryCollectionFilter {
Flatten(Expression collection) {
super(collection);
}
@Override
public Iterator<?> evaluateAsIterator(IEvaluationContext context) {
return new CompoundIterator<>(operand.evaluateAsIterator(context));
}
@Override
public int getExpressionType() {
return TYPE_FLATTEN;
}
@Override
public String getOperator() {
return IExpressionConstants.KEYWORD_FLATTEN;
}
}
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