/*******************************************************************************
 * Copyright (c) 2000, 2004 IBM Corporation 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
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/

package org.eclipse.ui.internal.activities;

import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;

import org.eclipse.ui.internal.util.Util;

public final class ActivityPatternBindingDefinition {
    private final static int HASH_FACTOR = 89;

    private final static int HASH_INITIAL = ActivityPatternBindingDefinition.class
            .getName().hashCode();

    static Map activityPatternBindingDefinitionsByActivityId(
            Collection activityPatternBindingDefinitions) {
        if (activityPatternBindingDefinitions == null)
            throw new NullPointerException();

        Map map = new HashMap();
        Iterator iterator = activityPatternBindingDefinitions.iterator();

        while (iterator.hasNext()) {
            Object object = iterator.next();
            Util.assertInstance(object, ActivityPatternBindingDefinition.class);
            ActivityPatternBindingDefinition activityPatternBindingDefinition = (ActivityPatternBindingDefinition) object;
            String activityId = activityPatternBindingDefinition
                    .getActivityId();

            if (activityId != null) {
                Collection activityPatternBindingDefinitions2 = (Collection) map
                        .get(activityId);

                if (activityPatternBindingDefinitions2 == null) {
                    activityPatternBindingDefinitions2 = new ArrayList();
                    map.put(activityId, activityPatternBindingDefinitions2);
                }

                activityPatternBindingDefinitions2
                        .add(activityPatternBindingDefinition);
            }
        }

        return map;
    }

    private String activityId;

    private transient int hashCode = HASH_INITIAL;

    private String pattern;

    private String sourceId;

    private transient String string;

    public ActivityPatternBindingDefinition(String activityId, String pattern,
            String sourceId) {
        this.activityId = activityId;
        this.pattern = pattern;
        this.sourceId = sourceId;
    }

    public int compareTo(Object object) {
        ActivityPatternBindingDefinition castedObject = (ActivityPatternBindingDefinition) object;
        int compareTo = Util.compare(activityId, castedObject.activityId);

        if (compareTo == 0) {
            compareTo = Util.compare(pattern, castedObject.pattern);

            if (compareTo == 0)
                compareTo = Util.compare(sourceId, castedObject.sourceId);
        }

        return compareTo;
    }

    public boolean equals(Object object) {
        if (!(object instanceof ActivityPatternBindingDefinition))
            return false;

        final ActivityPatternBindingDefinition castedObject = (ActivityPatternBindingDefinition) object;
        if (!Util.equals(activityId, castedObject.activityId)) {
            return false;
        }

        if (!Util.equals(pattern, castedObject.pattern)) {
            return false;
        }

        return Util.equals(sourceId, castedObject.sourceId);
    }

    public String getActivityId() {
        return activityId;
    }

    public String getPattern() {
        return pattern;
    }

    public String getSourceId() {
        return sourceId;
    }

    public int hashCode() {
        if (hashCode == HASH_INITIAL) {
            hashCode = hashCode * HASH_FACTOR + Util.hashCode(activityId);
            hashCode = hashCode * HASH_FACTOR + Util.hashCode(pattern);
            hashCode = hashCode * HASH_FACTOR + Util.hashCode(sourceId);
            if (hashCode == HASH_INITIAL)
                hashCode++;
        }

        return hashCode;
    }

    public String toString() {
        if (string == null) {
            final StringBuffer stringBuffer = new StringBuffer();
            stringBuffer.append('[');
            stringBuffer.append(activityId);
            stringBuffer.append(',');
            stringBuffer.append(pattern);
            stringBuffer.append(',');
            stringBuffer.append(sourceId);
            stringBuffer.append(']');
            string = stringBuffer.toString();
        }

        return string;
    }
}
