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Java client library for accessing Ning external API

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package com.ning.api.client.item;

import org.codehaus.jackson.annotate.JsonCreator;
import org.codehaus.jackson.annotate.JsonValue;

public class Key
{
    private final static Key EMPTY = new Key(null);
    
    private final String stringValue;

    @JsonCreator // optional, would be auto-detected
    public Key(String stringValue)
    {
        this.stringValue = (stringValue == null || stringValue.length() == 0) ? null : stringValue;
    }

    @SuppressWarnings("unchecked")
    public static  Key emptyKey() {
        return (Key) EMPTY;
    }

    public boolean isEmpty() {
        return (stringValue == null);
    }

    public int length() {
        return stringValue == null ? 0 : stringValue.length();
    }

    @JsonValue
    @Override
    public String toString() {
        return stringValue;
    }

    @Override
    public boolean equals(Object o)
    {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        Key key = (Key) o;
        return stringValue.equals(key.stringValue);
    }

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

    

    

            

    

            



    
    






    
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