/*
* Copyright (c) 2014 Cisco Systems, Inc. and others. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0 which accompanies this distribution,
* and is available at http://www.eclipse.org/legal/epl-v10.html
*/
package org.opendaylight.yangtools.util;
import com.google.common.base.Preconditions;
import com.google.common.collect.ImmutableSet;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.util.Set;
import org.opendaylight.yangtools.concepts.Immutable;
import org.opendaylight.yangtools.concepts.Mutable;
public final class Immutables {
private Immutables() {
throw new UnsupportedOperationException("Helper class");
}
public static final Set<Class<?>> KNOWN_IMMUTABLES = ImmutableSet.of(
Integer.class, Short.class, BigDecimal.class, BigInteger.class, Byte.class, Character.class, Double.class,
Float.class, String.class, Boolean.class, Void.class);
/**
* Determines if object is known to be immutable
*
* <p>Note: This method may return false to immutable objects which
* immutability is not known, was defined not using concepts term.
*
* @param o
* Reference to check
* @return true if object is known to be immutable false otherwise.
*/
public static boolean isImmutable(final Object o) {
Preconditions.checkArgument(o != null,"Object should not be null");
if (o instanceof Mutable) {
return false;
} else if (o instanceof Immutable) {
return true;
} else if (o instanceof String) {
return true;
} else if (KNOWN_IMMUTABLES.contains(o.getClass())) {
return true;
}
return false;
}
}