/*
 * ModeShape (http://www.modeshape.org)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.modeshape.common.util;

/**
 * Common utility methods for general objects.
 */
public class ObjectUtil {

    public static <Type> boolean isEqualNoNulls( Type reference1,
                                                 Type reference2 ) {
        return reference1.equals(reference2);
    }

    public static <Type> boolean isEqualWithNulls( Type reference1,
                                                   Type reference2 ) {
        return reference1 == null ? reference2 == null : reference1.equals(reference2);
    }

    @SuppressWarnings( {"unchecked", "rawtypes"} )
    public static int compareNoNulls( Comparable reference1,
                                      Comparable reference2 ) {
        return reference1.compareTo(reference2);
    }

    @SuppressWarnings( {"unchecked", "rawtypes"} )
    public static int compareWithNulls( Comparable reference1,
                                        Comparable reference2 ) {
        if (reference1 == null) return reference2 == null ? 0 : 1;
        if (reference2 == null) return 1;
        return reference1.compareTo(reference2);
    }

    private ObjectUtil() {
    }
}
