/*
***************************************************************************************
* 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.List;
/**
* Represents a rollup or cube in a group-by clause.
*/
public class GroupByClauseExpressionRollupOrCube implements GroupByClauseExpression {
private static final long serialVersionUID = 2632212485394913696L;
private boolean cube;
private List<GroupByClauseExpression> expressions;
/**
* Ctor.
*
* @param cube true for cube, false for rollup
* @param expressions group-by expressions as part of rollup or cube
*/
public GroupByClauseExpressionRollupOrCube(boolean cube, List<GroupByClauseExpression> expressions) {
this.cube = cube;
this.expressions = expressions;
}
/**
* Ctor.
*/
public GroupByClauseExpressionRollupOrCube() {
}
/**
* Returns the rollup or cube group-by expressions.
*
* @return expressions
*/
public List<GroupByClauseExpression> getExpressions() {
return expressions;
}
/**
* Sets the rollup or cube group-by expressions.
*
* @param expressions expressions to set
*/
public void setExpressions(List<GroupByClauseExpression> expressions) {
this.expressions = expressions;
}
/**
* Returns true for cube, false for rollup.
*
* @return cube
*/
public boolean isCube() {
return cube;
}
/**
* Set to true for cube, false for rollup.
*
* @param cube cube indicator
*/
public void setCube(boolean cube) {
this.cube = cube;
}
public void toEPL(StringWriter writer) {
if (cube) {
writer.append("cube(");
} else {
writer.append("rollup(");
}
String delimiter = "";
for (GroupByClauseExpression child : expressions) {
writer.write(delimiter);
child.toEPL(writer);
delimiter = ", ";
}
writer.append(")");
}
}