oracle.toplink.essentials.internal.parsing.FromNode Maven / Gradle / Ivy
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package oracle.toplink.essentials.internal.parsing;
import java.util.*;
/**
* INTERNAL
* Purpose: Represent a FROM
*
Responsibilities:
* - Determines the context for the Parse Tree
*
- Determine the reference class for a query
*
- Handle any FROM ... IN clauses
*
* @author Jon Driscoll
* @since TopLink 5.0
*/
public class FromNode extends MajorNode {
private List declarations;
public String getFirstVariable() {
String variable = null;
if ((declarations != null) && (declarations.size() > 0)) {
variable = ((IdentificationVariableDeclNode)declarations.get(0)).getCanonicalVariableName();
}
return variable;
}
public List getDeclarations() {
return declarations;
}
public void setDeclarations(List decls) {
declarations = decls;
}
/**
* INTERNAL
* Check the declaration nodes for a path expression starting with a
* unqualified field access and if so, replace it by a qualified field
* access.
*/
public Node qualifyAttributeAccess(ParseTreeContext context) {
for (int i = 0; i < declarations.size(); i++) {
Node decl = (Node)declarations.get(i);
declarations.set(i, decl.qualifyAttributeAccess(context));
}
return this;
}
/**
* INTERNAL
* Validate the current node.
*/
public void validate(ParseTreeContext context) {
for (Iterator i = declarations.iterator(); i.hasNext();) {
Node decl = (Node)i.next();
decl.validate(context);
}
}
}