/*
***************************************************************************************
* Copyright (C) 2006 EsperTech, Inc. All rights reserved. *
* http://www.espertech.com/esper *
* http://www.espertech.com *
* ---------------------------------------------------------------------------------- *
* The software in this package is published under the terms of the GPL license *
* a copy of which has been included with this distribution in the license.txt file. *
***************************************************************************************
*/
package com.espertech.esper.epl.expression.core;
import com.espertech.esper.client.EventBean;
import java.io.StringWriter;
public class ExprNamedParameterNodeImpl extends ExprNodeBase implements ExprNamedParameterNode, ExprEvaluator {
private static final long serialVersionUID = -7566189525627783543L;
private final String parameterName;
public ExprNamedParameterNodeImpl(String parameterName) {
this.parameterName = parameterName;
}
public String getParameterName() {
return parameterName;
}
public void toPrecedenceFreeEPL(StringWriter writer) {
writer.append(parameterName);
writer.append(":");
if (this.getChildNodes().length > 1) {
writer.append("(");
}
ExprNodeUtility.toExpressionStringParameterList(this.getChildNodes(), writer);
if (this.getChildNodes().length > 1) {
writer.append(")");
}
}
public ExprEvaluator getExprEvaluator() {
return this;
}
public ExprPrecedenceEnum getPrecedence() {
return ExprPrecedenceEnum.UNARY;
}
public boolean isConstantResult() {
return false;
}
public boolean equalsNode(ExprNode other, boolean ignoreStreamPrefix) {
if (!(other instanceof ExprNamedParameterNode)) {
return false;
}
ExprNamedParameterNode otherNamed = (ExprNamedParameterNode) other;
return otherNamed.getParameterName().equals(parameterName);
}
public ExprNode validate(ExprValidationContext validationContext) throws ExprValidationException {
return null;
}
public Object evaluate(EventBean[] eventsPerStream, boolean isNewData, ExprEvaluatorContext context) {
return null;
}
public Class getType() {
return null;
}
}