/**
* Process user parameters. User parameters of type PersistenceCapable are treated specially.
*
* @param node The node represting pararmeter in query tree
* @return If the parameter corresponds to a PersistenceCapable type, the text of the node as it
* is. Please note that by convention, all methods processing where clause rerturn a
* StringBuffer. This methos deviates from the convention for parameter of PersistenceCapable
* type. However, for this type of parameter, the return value of this method will always go
* into method leaveRelationalExpresionEntityEqual() which will always return a Stringbuffer.
* Else a StringBuffer representing parameter marker.
*/
@Override
public Object leaveParameter(EJBQLAST node) {
// TODO: As per discussion on conf call on 05/05, it should be possible to
// extract enough information while in this method to get hold of RunTimeMappingField
// (That is atleast String entityType and String fieldName).
// This information is required for embedded objects and object cocomparison
// for objects with composite pk to construct correct sql text and parameters
Object retVal;
JavaType javaType = (JavaType) node.getTypeInfo();
if (javaType.isPersistenceCapable()) {
// If this corresponds to an entity mapped to composite pk, this
// parameter will translate into multiple parameter markers in the
// generated sql. Let leaveRelationalExpresionEntityEqual handle this
// case
retVal = selectPlan.getParameterData(javaType, node.getText());
} else {
// The parameter will have exactly one parameter marker in the
// generated sql text. Add the parameter to plan.
retVal = selectPlan.addUserParameter(node.getText());
}
return retVal;
}
/** @return name of the field as String */
@Override
public Object leaveFieldCMRField(EJBQLAST node) {
return node.getText();
}
/** @return name of the field as String */
@Override
public String leaveFieldCMPField(EJBQLAST node) {
return node.getText();
}
@Override
public StringBuffer leaveSingleCharStringLiteral(EJBQLAST node) {
return selectPlan.getSingleCharExpr(node.getText());
}
@Override
public StringBuffer leaveWildcard(EJBQLAST node) {
return new StringBuffer(node.getText());
}
@Override
public StringBuffer leaveLiteralString(EJBQLAST node) {
return selectPlan.getStringExpr(node.getText());
}
@Override
public StringBuffer leaveLiteralDouble(EJBQLAST node) {
return new StringBuffer(node.getText());
}