/*
***************************************************************************************
* 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.client.soda;
import java.io.StringWriter;
import java.util.ArrayList;
import java.util.List;
/**
* Dot-expresson is for use in "(inner_expression).dot_expression".
*/
public class DotExpression extends ExpressionBase {
private static final long serialVersionUID = -7597133103354244332L;
private List<DotExpressionItem> chain = new ArrayList<DotExpressionItem>();
/**
* Ctor.
*/
public DotExpression() {
}
/**
* Ctor.
*
* @param innerExpression the expression in parenthesis
*/
public DotExpression(Expression innerExpression) {
this.getChildren().add(innerExpression);
}
/**
* Add a method to the chain of methods after the dot.
*
* @param methodName to add
* @param parameters parameters to method
*/
public void add(String methodName, List<Expression> parameters) {
chain.add(new DotExpressionItem(methodName, parameters, false));
}
/**
* Add a method to the chain of methods after the dot, indicating the this segment is a property and does not need parenthesis and won't have paramaters.
*
* @param methodName method name
* @param parameters parameter expressions
* @param isProperty property flag
*/
public void add(String methodName, List<Expression> parameters, boolean isProperty) {
chain.add(new DotExpressionItem(methodName, parameters, isProperty));
}
/**
* Returns the method chain of all methods after the dot.
*
* @return method name ane list of parameters
*/
public List<DotExpressionItem> getChain() {
return chain;
}
public ExpressionPrecedenceEnum getPrecedence() {
return ExpressionPrecedenceEnum.MINIMUM;
}
public void toPrecedenceFreeEPL(StringWriter writer) {
if (!this.getChildren().isEmpty()) {
this.getChildren().get(0).toEPL(writer, getPrecedence());
}
DotExpressionItem.render(chain, writer, !this.getChildren().isEmpty());
}
}