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/*
 * JBoss, Home of Professional Open Source
 * Copyright 2013, Red Hat, Inc., and individual contributors
 * by the @authors tag. See the copyright.txt in the distribution for a
 * full listing of individual contributors.
 *
 * 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.jboss.weld.bootstrap.enablement;

import org.jboss.weld.util.Preconditions;

import java.util.Objects;

class Item implements Comparable {

    private final Class javaClass;

    private final Integer priority;

    public Item(Class javaClass) {
        this(javaClass, null);
    }

    public Item(Class javaClass, Integer priority) {
        Preconditions.checkArgumentNotNull(javaClass, "javaClass");
        this.javaClass = javaClass;
        this.priority = priority;
    }

    @Override
    public int compareTo(Item o) {
        if (priority.equals(o.priority)) {
                /*
                 * The spec does not specify what happens if two records have the same priority. Instead of giving random results, we compare the records based
                 * on their class name lexicographically.
                 */
            return javaClass.getName().compareTo(o.javaClass.getName());
        }
        return priority - o.priority;
    }

    @Override
    public int hashCode() {
        return javaClass.hashCode();
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        }
        if (obj instanceof Item) {
            Item that = (Item) obj;
            return Objects.equals(javaClass, that.javaClass);
        }
        return false;
    }

    public Class getJavaClass() {
        return javaClass;
    }

    @Override
    public String toString() {
        return "[Class=" + javaClass + ", priority=" + priority + "]";
    }
}