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/*******************************************************************************
* Copyright (c) 2010-2018, Gabor Bergmann, 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.util;
import java.util.Iterator;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import java.util.function.BiConsumer;
/**
* Wraps a Map<T, Integer> (mapping elements to non-zero multiplicities) into an {@link IMemoryView}.
*
* @author Gabor Bergmann
* @since 2.0
*/
public class MapBackedMemoryView<T> implements IMemoryView<T> {
private Map<T, Integer> wrapped;
/**
* @param wrapped an equivalent map from contained objects to multiplicities
*/
protected MapBackedMemoryView(Map<T, Integer> wrapped) {
super();
this.wrapped = wrapped;
}
@Override
public Iterator<T> iterator() {
return wrapped.keySet().iterator();
}
@Override
public int getCount(T value) {
return getCountUnsafe(value);
}
@Override
public int getCountUnsafe(Object value) {
Integer count = wrapped.get(value);
return count == null ? 0 : count;
}
@Override
public boolean containsNonZero(T value) {
return wrapped.containsKey(value);
}
@Override
public boolean containsNonZeroUnsafe(Object value) {
return wrapped.containsKey(value);
}
@Override
public int size() {
return wrapped.size();
}
@Override
public boolean isEmpty() {
return wrapped.isEmpty();
}
@Override
public Set<T> distinctValues() {
return wrapped.keySet();
}
@Override
public void forEachEntryWithMultiplicities(BiConsumer<T, Integer> entryConsumer) {
for (Entry<T, Integer> entry : wrapped.entrySet()) {
entryConsumer.accept(entry.getKey(), entry.getValue());
}
}
@Override
public Iterable<Entry<T, Integer>> entriesWithMultiplicities() {
return wrapped.entrySet();
}
@Override
public int hashCode() {
return IMemoryView.hashCode(this);
}
@Override
public boolean equals(Object obj) {
return IMemoryView.equals(this, obj);
}
@Override
public String toString() {
return wrapped.toString();
}
}
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