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Cayenne Object Persistence Framework

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package org.apache.cayenne.exp;

import org.apache.cayenne.util.Util;

/**
 * Named parameter for paramterized expressions.
 * 
 * @author Andrei Adamchik
 */
public class ExpressionParameter {
	protected String name;

    /**
     * Constructor for ExpressionParam.
     */
    public ExpressionParameter(String name) {
        this.name = name;
    }
    
    /**
     * Returns the name of the expression parameter.
     */
    public String getName() {
        return name;
    }
    
    public String toString() {
    	return '$' + name;
    }
    
    public boolean equals(Object o) {
        if(!(o instanceof ExpressionParameter)) {
            return false;
        }
        
        ExpressionParameter parameter = (ExpressionParameter)o;
        return Util.nullSafeEquals(name, parameter.name);
    }
}