oracle.toplink.essentials.internal.parsing.SqrtNode Maven / Gradle / Ivy
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package oracle.toplink.essentials.internal.parsing;
import oracle.toplink.essentials.expressions.*;
/**
* INTERNAL
* Purpose: Represent a SQRT
*
Responsibilities:
* - Generate the correct expression for SQRT
*
* @author Jon Driscoll and Joel Lucuik
* @since TopLink 4.0
*/
public class SqrtNode extends ArithmeticFunctionNode {
/**
* Return a new SqrtNode
*/
public SqrtNode() {
super();
}
/**
* INTERNAL
* Validate node and calculate its type.
*/
public void validate(ParseTreeContext context) {
TypeHelper typeHelper = context.getTypeHelper();
if (left != null) {
left.validate(context);
}
setType(typeHelper.getDoubleType());
}
/**
* INTERNAL
*/
public void validateParameter(ParseTreeContext context, Object contextType) {
// delegate to the argument node
left.validateParameter(context, contextType);
}
/**
* INTERNAL
* Generate the TopLink expression for this node
*/
public Expression generateExpression(GenerationContext context) {
Expression whereClause = getLeft().generateExpression(context);
whereClause = whereClause.getFunction(ExpressionOperator.Sqrt);
return whereClause;
}
}