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A bundle project producing JAX-RS RI bundles. The primary artifact is an "all-in-one" OSGi-fied JAX-RS RI bundle (jaxrs-ri.jar). Attached to that are two compressed JAX-RS RI archives. The first archive (jaxrs-ri.zip) consists of binary RI bits and contains the API jar (under "api" directory), RI libraries (under "lib" directory) as well as all external RI dependencies (under "ext" directory). The secondary archive (jaxrs-ri-src.zip) contains buildable JAX-RS RI source bundle and contains the API jar (under "api" directory), RI sources (under "src" directory) as well as all external RI dependencies (under "ext" directory). The second archive also contains "build.xml" ANT script that builds the RI sources. To build the JAX-RS RI simply unzip the archive, cd to the created jaxrs-ri directory and invoke "ant" from the command line.

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/*
 * Copyright (C) 2007 The Guava Authors
 *
 * 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.glassfish.jersey.internal.guava;

import java.io.Serializable;

/**
 * An ordering that treats {@code null} as less than all other values.
 */
final class NullsFirstOrdering extends Ordering implements Serializable {
    private static final long serialVersionUID = 0;
    private final Ordering ordering;

    NullsFirstOrdering(Ordering ordering) {
        this.ordering = ordering;
    }

    @Override
    public int compare(T left, T right) {
        if (left == right) {
            return 0;
        }
        if (left == null) {
            return RIGHT_IS_GREATER;
        }
        if (right == null) {
            return LEFT_IS_GREATER;
        }
        return ordering.compare(left, right);
    }

    @Override
    public  Ordering reverse() {
        // ordering.reverse() might be optimized, so let it do its thing
        return ordering.reverse().nullsLast();
    }

    @SuppressWarnings("unchecked") // still need the right way to explain this
    @Override
    public  Ordering nullsFirst() {
        return (Ordering) this;
    }

    @Override
    public  Ordering nullsLast() {
        return ordering.nullsLast();
    }

    @Override
    public boolean equals(Object object) {
        if (object == this) {
            return true;
        }
        if (object instanceof NullsFirstOrdering) {
            NullsFirstOrdering that = (NullsFirstOrdering) object;
            return this.ordering.equals(that.ordering);
        }
        return false;
    }

    @Override
    public int hashCode() {
        return ordering.hashCode() ^ 957692532; // meaningless
    }

    @Override
    public String toString() {
        return ordering + ".nullsFirst()";
    }
}