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/*******************************************************************************
* Copyright (c) 2010-2017, Zoltan Ujhelyi, IncQuery Labs Ltd.
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0 which is available at
* http://www.eclipse.org/legal/epl-v20.html.
*
* SPDX-License-Identifier: EPL-2.0
*******************************************************************************/
package tools.refinery.viatra.runtime.matchers.tuple;
import java.util.List;
import java.util.Map;
import java.util.Set;
/**
* Represents both mutable and immutable tuples
*
* @author Zoltan Ujhelyi
* @since 1.7
*
*/
public interface ITuple {
/**
* @pre: 0 <= index < getSize()
*
* @return the element at the specified index
*/
Object get(int index);
/**
* As the tuple is supposed to be immutable, do not modify the returned array.
* @return the array containing all elements of this Tuple
*/
Object[] getElements();
/**
* @return the set containing all distinct elements of this Tuple, cast as type T
*/
<T> Set<T> getDistinctElements();
/**
* @return number of elements
*/
int getSize();
/**
* Calculates an inverted index of the elements of this pattern. For each element, the index of the (last)
* occurrence is calculated.
*
* @return the inverted index mapping each element of this pattern to its index in the array
*/
Map<Object, Integer> invertIndex();
/**
* Calculates an inverted index of the elements of this pattern. For each element, the index of all of its
* occurrences is calculated.
*
* @return the inverted index mapping each element of this pattern to its index in the array
*/
Map<Object, List<Integer>> invertIndexWithMupliplicity();
Tuple toImmutable();
}
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