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• 3.1.0
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• NullValue.java

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net.sf.xmlform.expression.NullValue Maven / Gradle / Ivy

package net.sf.xmlform.expression;

import net.sf.xmlform.expression.impl.AbstractValue;

/**
 * @author Liu Zhikun
 */

public class NullValue extends AbstractValue implements Value {
	static public NullValue NULL_VALUE=new NullValue();
	
	private NullValue(){
		
	}
	
	public int compareTo(Value obj) {
		if(obj==null)
			return 0;
		if(obj instanceof NullValue)
			return 0;
		return -1;
	}

	public Object getValue() {
		return null;
	}
	
	public String toString() {
		return "";
	}
}