oracle.toplink.essentials.internal.parsing.EqualsAssignmentNode Maven / Gradle / Ivy
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package oracle.toplink.essentials.internal.parsing;
import oracle.toplink.essentials.exceptions.EJBQLException;
/**
* INTERNAL:
* EqualsAssignmentNode is implemented to distinguish nodes that hold updates in an update
* query from other BinaryOperatorNodes
*/
public class EqualsAssignmentNode extends BinaryOperatorNode {
/**
* INTERNAL
* Validate the current node and calculates its type.
*/
public void validate(ParseTreeContext context) {
// look for any field access that is not qualified with an variable
super.validate(context);
validateTarget(left, context);
}
/** */
private void validateTarget(Node node, ParseTreeContext context) {
if (node.isDotNode()) {
TypeHelper typeHelper = context.getTypeHelper();
Node path = node.getLeft();
Object type = path.getType();
AttributeNode attributeNode = (AttributeNode)node.getRight();
String attribute = attributeNode.getAttributeName();
if (typeHelper.isSingleValuedRelationship(type, attribute) ||
typeHelper.isSimpleStateAttribute(type, attribute)) {
validateNavigation(path, context);
} else {
throw EJBQLException.invalidSetClauseTarget(
context.getQueryInfo(), attributeNode.getLine(),
attributeNode.getColumn(), path.getAsString(), attribute);
}
}
}
/** */
private void validateNavigation(Node qualifier, ParseTreeContext context) {
if (qualifier.isDotNode()) {
TypeHelper typeHelper = context.getTypeHelper();
Node left = qualifier.getLeft();
AttributeNode attributeNode = (AttributeNode)qualifier.getRight();
String attribute = attributeNode.getAttributeName();
Object type = left.getType();
if (!typeHelper.isEmbeddedAttribute(type, attribute)) {
throw EJBQLException.invalidSetClauseNavigation(
context.getQueryInfo(), attributeNode.getLine(),
attributeNode.getColumn(), qualifier.getAsString(), attribute);
}
validateNavigation(left, context);
}
}
}