/******************************************************************************* | |
* Copyright (c) 1998, 2013 Oracle and/or its affiliates. All rights reserved. | |
* This program and the accompanying materials are made available under the | |
* terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0 | |
* which accompanies this distribution. | |
* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html | |
* and the Eclipse Distribution License is available at | |
* http://www.eclipse.org/org/documents/edl-v10.php. | |
* | |
* Contributors: | |
* Oracle - initial API and implementation from Oracle TopLink | |
******************************************************************************/ | |
package org.eclipse.persistence.internal.jpa.parsing; | |
// Java imports | |
import java.util.*; | |
// TopLink imports | |
import org.eclipse.persistence.expressions.*; | |
import org.eclipse.persistence.queries.ReportQuery; | |
import org.eclipse.persistence.exceptions.JPQLException; | |
/** | |
* INTERNAL | |
* <p><b>Purpose</b>: Represent an IN in EJBQL | |
* <p><b>Responsibilities</b>:<ul> | |
* <li> Generate the correct expression for an IN | |
* </ul> | |
* @author Jon Driscoll and Joel Lucuik | |
* @since TopLink 4.0 | |
*/ | |
public class InNode extends SimpleConditionalExpressionNode { | |
private List theObjects = null; | |
//Was NOT indicated? "WHERE emp.lastName NOT IN (...) | |
private boolean notIndicated = false; | |
private boolean isListParameterOrSubquery = false; | |
/** | |
* InNode constructor comment. | |
*/ | |
public InNode() { | |
super(); | |
} | |
/** | |
* INTERNAL | |
* Add the passed node value to the collection of object for this node | |
*/ | |
public void addNodeToTheObjects(Node theNode) { | |
getTheObjects().add(theNode); | |
} | |
/** | |
* INTERNAL | |
* Validate the current node and calculates its type. | |
*/ | |
public void validate(ParseTreeContext context) { | |
Object leftType = null; | |
TypeHelper typeHelper = context.getTypeHelper(); | |
if (left != null) { | |
left.validate(context); | |
// check to see if the argument is a parameter | |
if (isListParameterOrSubquery && !getTheObjects().isEmpty() && ((Node)getTheObjects().get(0)).isParameterNode()){ | |
leftType = Collection.class; | |
} else { | |
leftType = left.getType(); | |
} | |
} | |
for (Iterator i = getTheObjects().iterator(); i.hasNext();) { | |
Node node = (Node)i.next(); | |
node.validate(context); | |
node.validateParameter(context, leftType); | |
Object nodeType = node.getType(); | |
if ((leftType != null) && !typeHelper.isAssignableFrom(leftType, nodeType)) | |
throw JPQLException.invalidExpressionArgument( | |
context.getQueryInfo(), node.getLine(), node.getColumn(), | |
"IN", node.getAsString(), typeHelper.getTypeName(leftType)); | |
} | |
setType(typeHelper.getBooleanType()); | |
} | |
/** | |
* INTERNAL | |
* Return the EclipseLink expression for this node | |
*/ | |
public Expression generateExpression(GenerationContext context) { | |
Expression whereClause = getLeft().generateExpression(context); | |
List arguments = getTheObjects(); | |
Node firstArg = (Node)arguments.get(0); | |
if (firstArg.isSubqueryNode()) { | |
SubqueryNode subqueryNode = (SubqueryNode)firstArg; | |
ReportQuery reportQuery = subqueryNode.getReportQuery(context); | |
if (notIndicated()) { | |
whereClause = whereClause.notIn(reportQuery); | |
} | |
else { | |
whereClause = whereClause.in(reportQuery); | |
} | |
} else if (isListParameterOrSubquery && firstArg.isParameterNode()) { | |
if (notIndicated()) { | |
whereClause = whereClause.notIn(firstArg.generateExpression(context)); | |
} else { | |
whereClause = whereClause.in(firstArg.generateExpression(context)); | |
} | |
} else { | |
Vector inArguments = new Vector(arguments.size()); | |
for (Iterator iter = arguments.iterator(); iter.hasNext();) { | |
Node nextNode = (Node)iter.next(); | |
inArguments.add(nextNode.generateExpression(context)); | |
} | |
if (inArguments.size() > 0) { | |
if (notIndicated()) { | |
whereClause = whereClause.notIn(inArguments); | |
} else { | |
whereClause = whereClause.in(inArguments); | |
} | |
} | |
} | |
return whereClause; | |
} | |
/** | |
* INTERNAL | |
* Return the collection of the objects used as parameters for this node | |
*/ | |
public List getTheObjects() { | |
if (theObjects == null) { | |
setTheObjects(new Vector()); | |
} | |
return theObjects; | |
} | |
/** | |
* INTERNAL: | |
* This method is called to indicate that the inNode has a single argument. This will be either a | |
* subquery or a single parameter that contains the list of items to test | |
* @param isListParameterOrSubquery | |
*/ | |
public void setIsListParameterOrSubquery(boolean isListParameterOrSubquery){ | |
this.isListParameterOrSubquery = isListParameterOrSubquery; | |
} | |
/** | |
* INTERNAL | |
* Set this node's object collection to the passed value | |
*/ | |
public void setTheObjects(List newTheObjects) { | |
theObjects = newTheObjects; | |
} | |
/** | |
* INTERNAL | |
* Indicate if a NOT was found in the WHERE clause. | |
* Examples: | |
* ...WHERE ... NOT IN(...) | |
*/ | |
public void indicateNot() { | |
notIndicated = true; | |
} | |
public boolean notIndicated() { | |
return notIndicated; | |
} | |
} |