/*************************************************************************
 * 
 * ADOBE CONFIDENTIAL __________________
 * 
 * Copyright 2002 - 2007 Adobe Systems Incorporated All Rights Reserved.
 * 
 * NOTICE: All information contained herein is, and remains the property of Adobe Systems Incorporated and its suppliers, if any. The intellectual and technical concepts contained herein are
 * proprietary to Adobe Systems Incorporated and its suppliers and may be covered by U.S. and Foreign Patents, patents in process, and are protected by trade secret or copyright law. Dissemination of
 * this information or reproduction of this material is strictly forbidden unless prior written permission is obtained from Adobe Systems Incorporated.
 **************************************************************************/
package flex.messaging.io.amf;

import java.util.ArrayList;
import java.util.List;

/**
 * AVM+ Serialization optimizes object serialization by serializing the traits of a type once, and then sending only the values of each instance of the type as it occurs in the stream.
 * 
 * @author Peter Farland
 * @exclude
 */
public class TraitsInfo
{
    private final String className;
    private final boolean dynamic;
    private final boolean externalizable;
    private List properties;

    /*
     * TODO UCdetector: Remove unused code: public TraitsInfo(String className) { this(className, false, false, 10); }
     */

    /*
     * TODO UCdetector: Remove unused code: public TraitsInfo(String className, int initialCount) { this(className, false, false, initialCount); }
     */

    public TraitsInfo(String className, boolean dynamic, boolean externalizable, int initialCount)
    {
        this(className, dynamic, externalizable, new ArrayList(initialCount));
    }

    public TraitsInfo(String className, boolean dynamic, boolean externalizable, List properties)
    {
        if (className == null)
            className = "";

        this.className = className;

        if (properties == null)
            properties = new ArrayList();

        this.properties = properties;
        this.dynamic = dynamic;
        this.externalizable = externalizable;
    }

    public boolean isDynamic()
    {
        return dynamic;
    }

    public boolean isExternalizable()
    {
        return externalizable;
    }

    public int length()
    {
        return properties.size();
    }

    public String getClassName()
    {
        return className;
    }

    public void addProperty(String name)
    {
        properties.add(name);
    }

    /*
     * TODO UCdetector: Remove unused code: public void addAllProperties(Collection props) { properties.addAll(props); }
     */

    public String getProperty(int i)
    {
        return (String) properties.get(i);
    }

    public List getProperties()
    {
        return properties;
    }

    @Override
    public boolean equals(Object obj)
    {
        if (obj == this)
        {
            return true;
        }

        if (obj instanceof TraitsInfo)
        {
            TraitsInfo other = (TraitsInfo) obj;

            if (!this.className.equals(other.className))
            {
                return false;
            }

            if (!(this.dynamic == other.dynamic))
            {
                return false;
            }

            List thisProperties = this.properties;
            List otherProperties = other.properties;

            if (thisProperties != otherProperties)
            {
                int thisCount = thisProperties.size();

                if (thisCount != otherProperties.size())
                {
                    return false;
                }

                for (int i = 0; i < thisCount; i++)
                {
                    Object thisProp = thisProperties.get(i);
                    Object otherProp = otherProperties.get(i);
                    if (thisProp != null && otherProp != null)
                    {
                        if (!thisProp.equals(otherProp))
                        {
                            return false;
                        }
                    }
                }
            }

            return true;
        }

        return false;
    }

    /**
     * Instances of types with the same classname and number of properties may return the same hash code, however, an equality test will fully test whether they match exactly on individual property
     * names.
     */
    @Override
    public int hashCode()
    {
        int c = className.hashCode();
        c = dynamic ? c << 2 : c << 1;
        c = c | (properties.size() << 24);
        return c;
    }
}