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package oracle.toplink.essentials.internal.parsing;

import oracle.toplink.essentials.expressions.*;

/**
 * INTERNAL
 * 

Purpose: Represent a BETWEEN in EJBQL *

Responsibilities:

    *
  • Generate the correct expression for a BETWEEN in EJBQL *
* @author Jon Driscoll and Joel Lucuik * @since TopLink 4.0 */ public class BetweenNode extends SimpleConditionalExpressionNode { protected Node rightForBetween; protected Node rightForAnd; /** * BetweenNode constructor comment. */ public BetweenNode() { super(); } /** * INTERNAL * Check the child nodes for an unqualified field access and if there are * any, replace them by a qualified field access. */ public Node qualifyAttributeAccess(ParseTreeContext context) { if (left != null) { left = left.qualifyAttributeAccess(context); } if (rightForBetween != null) { rightForBetween = rightForBetween.qualifyAttributeAccess(context); } if (rightForAnd != null) { rightForAnd = rightForAnd.qualifyAttributeAccess(context); } return this; } /** * INTERNAL * Validate node and calcualte its type. */ public void validate(ParseTreeContext context) { Object type = null; if (left != null) { left.validate(context); type = left.getType(); } if (rightForBetween != null) { rightForBetween.validate(context); rightForBetween.validateParameter(context, type); } if (rightForAnd != null) { rightForAnd.validate(context); rightForAnd.validateParameter(context, type); } TypeHelper typeHelper = context.getTypeHelper(); setType(typeHelper.getBooleanType()); } /** * INTERNAL * Return a TopLink expression by 'BETWEEN' and 'AND'ing the expressions from the left, * rightForBetween and rightForAnd nodes */ public Expression generateExpression(GenerationContext context) { // Get the left expression Expression whereClause = getLeft().generateExpression(context); // Between it with whatever the rightForBetween expression and rightForAnd expressions are whereClause = whereClause.between(getRightForBetween().generateExpression(context), getRightForAnd().generateExpression(context)); // and return the expression... return whereClause; } public Node getRightForAnd() { return rightForAnd; } public Node getRightForBetween() { return rightForBetween; } public boolean hasRightForAnd() { return rightForAnd != null; } public boolean hasRightForBetween() { return rightForBetween != null; } public void setRightForAnd(Node newRightForAnd) { rightForAnd = newRightForAnd; } public void setRightForBetween(Node newRightForBetween) { rightForBetween = newRightForBetween; } }




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