oracle.toplink.essentials.internal.parsing.NodeFactoryImpl Maven / Gradle / Ivy
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package oracle.toplink.essentials.internal.parsing;
import java.util.List;
/**
* INTERNAL
* Purpose: Implements a node factory used by the EJBQLParser
* class.
*
Responsibilities:
* - Create EJBQLParseTree instances for EJBQL SELECT-, UPDATE- and DELETE
* statements (see methods newSelectStatement, newUpdateStatement and
* newDeleteStatement).
*
- Any new
method returns an instance of the appropriate Node
* subclass.
* - The relationship to the child nodes passed as arguments are
* automatically initialized.
*
- Note, this implementation has a state managing the parse tree context
* and a list of parameter names for the current parse tree. This state needs
* to be initilized before the same node factory implementation instacne may
* be used to create a second parse tree (see methods initContext and
* initParameters).
*
- The implementation automatically adds the list of parameters to the
* created parse tree.
*
- The implementation automatically sets the parse tree context for any
* created major node.
*
*/
public class NodeFactoryImpl implements NodeFactory {
/** The parse tree context. */
private ParseTreeContext context;
/** */
private String currentIdentificationVariable;
/** No-arg Constructor */
public NodeFactoryImpl(String queryInfo) {
this.context = new ParseTreeContext(this, queryInfo);
}
// ------------------------------------------
// Trees
// ------------------------------------------
/** */
public Object newSelectStatement(int line, int column,
Object select, Object from,
Object where, Object groupBy,
Object having, Object orderBy) {
QueryNode queryNode = (QueryNode)select;
EJBQLParseTree tree = new EJBQLParseTree();
queryNode.setParseTree(tree);
tree.setContext(context);
tree.setQueryNode(queryNode);
tree.setFromNode((FromNode)from);
tree.setWhereNode((WhereNode)where);
tree.setGroupByNode((GroupByNode)groupBy);
tree.setHavingNode((HavingNode)having);
tree.setOrderByNode((OrderByNode)orderBy);
return tree;
}
/** */
public Object newUpdateStatement(int line, int column,
Object update, Object set, Object where) {
QueryNode queryNode = (QueryNode)update;
EJBQLParseTree tree = new EJBQLParseTree();
queryNode.setParseTree(tree);
tree.setContext(context);
tree.setQueryNode(queryNode);
tree.setSetNode((SetNode)set);
tree.setWhereNode((WhereNode)where);
return tree;
}
/** */
public Object newDeleteStatement(int line, int column,
Object delete, Object where) {
QueryNode queryNode = (QueryNode)delete;
EJBQLParseTree tree = new EJBQLParseTree();
queryNode.setParseTree(tree);
tree.setContext(context);
tree.setQueryNode(queryNode);
tree.setWhereNode((WhereNode)where);
return tree;
}
// ------------------------------------------
// Major nodes
// ------------------------------------------
/** */
public Object newSelectClause(int line, int column,
boolean distinct, List selectExprs) {
SelectNode node = new SelectNode();
node.setContext(context);
node.setSelectExpressions(selectExprs);
node.setDistinct(distinct);
setPosition(node, line, column);
return node;
}
/** */
public Object newFromClause(int line, int column, List decls) {
FromNode node = new FromNode();
node.setContext(context);
node.setDeclarations(decls);
setPosition(node, line, column);
return node;
}
/** */
public Object newWhereClause(int line, int column, Object condition) {
WhereNode node = new WhereNode();
node.setContext(context);
node.setLeft((Node)condition);
setPosition(node, line, column);
return node;
}
/** */
public Object newGroupByClause(int line, int column, List items) {
GroupByNode node = new GroupByNode();
node.setContext(context);
node.setGroupByItems(items);
setPosition(node, line, column);
return node;
}
/** */
public Object newHavingClause(int line, int column, Object arg) {
HavingNode node = new HavingNode();
node.setContext(context);
node.setHaving((Node)arg);
setPosition(node, line, column);
return node;
}
/** */
public Object newOrderByClause(int line, int column, List items) {
OrderByNode node = new OrderByNode();
node.setContext(context);
node.setOrderByItems(items);
setPosition(node, line, column);
return node;
}
/** */
public Object newUpdateClause(int line, int column,
String schema, String variable) {
UpdateNode node = new UpdateNode();
node.setContext(context);
node.setAbstractSchemaName(schema);
node.setAbstractSchemaIdentifier(variable);
setPosition(node, line, column);
registerSchema(calculateCanonicalName(variable), schema, line, column);
return node;
}
/** */
public Object newDeleteClause(int line, int column,
String schema, String variable) {
DeleteNode node = new DeleteNode();
node.setContext(context);
node.setAbstractSchemaName(schema);
node.setAbstractSchemaIdentifier(variable);
setPosition(node, line, column);
registerSchema(calculateCanonicalName(variable), schema, line, column);
return node;
}
// ------------------------------------------
// Variable declaration nodes
// ------------------------------------------
/** */
public Object newRangeVariableDecl(int line, int column,
String schema, String variable) {
RangeDeclNode node = new RangeDeclNode();
node.setAbstractSchemaName(schema);
node.setVariableName(variable);
setPosition(node, line, column);
registerSchema(node.getCanonicalVariableName(), schema, line, column);
currentIdentificationVariable = variable;
return node;
}
/** */
public Object newJoinVariableDecl(int line, int column, boolean outerJoin,
Object path, String variable) {
DotNode dotNode = (DotNode)path;
AttributeNode rightNode = (AttributeNode)dotNode.getRight();
rightNode.setOuterJoin(outerJoin);
JoinDeclNode node = new JoinDeclNode();
node.setPath(dotNode);
node.setVariableName(variable);
node.setOuterJoin(outerJoin);
setPosition(node, line, column);
context.registerJoinVariable(node.getCanonicalVariableName(), dotNode, line, column);
currentIdentificationVariable = variable;
return node;
}
/** */
public Object newFetchJoin(int line, int column,
boolean outerJoin, Object path) {
DotNode dotNode = (DotNode)path;
AttributeNode rightNode = (AttributeNode)dotNode.getRight();
rightNode.setOuterJoin(outerJoin);
// register the dot expression to be added as joined attribute
FetchJoinNode node = new FetchJoinNode();
node.setPath(dotNode);
node.setOuterJoin(outerJoin);
setPosition(node, line, column);
context.registerFetchJoin(dotNode.getLeft().getAsString(), dotNode);
return node;
}
/** */
public Object newCollectionMemberVariableDecl(int line, int column,
Object path, String variable) {
DotNode dotNode = (DotNode)path;
AttributeNode rightNode = (AttributeNode)dotNode.getRight();
// The IN-clause expression must be a collection valued path expression
rightNode.setRequiresCollectionAttribute(true);
CollectionMemberDeclNode node = new CollectionMemberDeclNode();
node.setPath(dotNode);
node.setVariableName(variable);
setPosition(node, line, column);
context.registerJoinVariable(node.getCanonicalVariableName(), dotNode, line, column);
currentIdentificationVariable = variable;
return node;
}
/** */
public Object newVariableDecl(int line, int column,
Object path, String variable) {
DotNode dotNode = (DotNode)path;
AttributeNode rightNode = (AttributeNode)dotNode.getRight();
JoinDeclNode node = new JoinDeclNode();
node.setPath(dotNode);
node.setVariableName(variable);
setPosition(node, line, column);
context.registerJoinVariable(node.getCanonicalVariableName(), dotNode, line, column);
currentIdentificationVariable = variable;
return node;
}
// ------------------------------------------
// Identifier and path expression nodes
// ------------------------------------------
/** */
public Object newDot(int line, int column, Object left, Object right) {
DotNode node = new DotNode();
node.setLeft((Node)left);
node.setRight((Node)right);
setPosition(node, line, column);
return node;
}
/** */
public Object newVariableAccess(int line, int column, String identifier) {
VariableNode node = new VariableNode(identifier);
setPosition(node, line, column);
return node;
}
/** */
public Object newAttribute(int line, int column, String identifier) {
AttributeNode node = new AttributeNode(identifier);
setPosition(node, line, column);
return node;
}
/** */
public Object newQualifiedAttribute(int line, int column,
String variable, String attribute) {
Object varNode = newVariableAccess(line, column, variable);
Object attrNode = newAttribute(line, column, attribute);
return newDot(line, column, varNode, attrNode);
}
// ------------------------------------------
// Aggregate nodes
// ------------------------------------------
/** */
public Object newAvg(int line, int column, boolean distinct, Object arg) {
AvgNode node = new AvgNode();
node.setLeft((Node)arg);
node.setDistinct(distinct);
setPosition(node, line, column);
return node;
}
/** */
public Object newMax(int line, int column, boolean distinct, Object arg) {
MaxNode node = new MaxNode();
node.setLeft((Node)arg);
node.setDistinct(distinct);
setPosition(node, line, column);
return node;
}
/** */
public Object newMin(int line, int column, boolean distinct, Object arg) {
MinNode node = new MinNode();
node.setLeft((Node)arg);
node.setDistinct(distinct);
setPosition(node, line, column);
return node;
}
/** */
public Object newSum(int line, int column, boolean distinct, Object arg) {
SumNode node = new SumNode();
node.setLeft((Node)arg);
node.setDistinct(distinct);
setPosition(node, line, column);
return node;
}
/** */
public Object newCount(int line, int column, boolean distinct, Object arg) {
CountNode node = new CountNode();
node.setLeft((Node)arg);
node.setDistinct(distinct);
setPosition(node, line, column);
return node;
}
// ------------------------------------------
// Binary expression nodes
// ------------------------------------------
/** */
public Object newOr(int line, int column, Object left, Object right) {
OrNode node = new OrNode();
node.setLeft((Node)left);
node.setRight((Node)right);
setPosition(node, line, column);
return node;
}
/** */
public Object newAnd(int line, int column, Object left, Object right) {
AndNode node = new AndNode();
node.setLeft((Node)left);
node.setRight((Node)right);
setPosition(node, line, column);
return node;
}
/** */
public Object newEquals(int line, int column, Object left, Object right) {
EqualsNode node = new EqualsNode();
node.setLeft((Node)left);
node.setRight((Node)right);
setPosition(node, line, column);
return node;
}
/** */
public Object newNotEquals(int line, int column, Object left, Object right) {
NotEqualsNode node = new NotEqualsNode();
node.setLeft((Node)left);
node.setRight((Node)right);
setPosition(node, line, column);
return node;
}
/** */
public Object newGreaterThan(int line, int column,
Object left, Object right) {
GreaterThanNode node = new GreaterThanNode();
node.setLeft((Node)left);
node.setRight((Node)right);
setPosition(node, line, column);
return node;
}
/** */
public Object newGreaterThanEqual(int line, int column,
Object left, Object right) {
GreaterThanEqualToNode node = new GreaterThanEqualToNode();
node.setLeft((Node)left);
node.setRight((Node)right);
setPosition(node, line, column);
return node;
}
/** */
public Object newLessThan(int line, int column, Object left, Object right) {
LessThanNode node = new LessThanNode();
node.setLeft((Node)left);
node.setRight((Node)right);
setPosition(node, line, column);
return node;
}
/** */
public Object newLessThanEqual(int line, int column,
Object left, Object right) {
LessThanEqualToNode node = new LessThanEqualToNode();
node.setLeft((Node)left);
node.setRight((Node)right);
setPosition(node, line, column);
return node;
}
/** */
public Object newPlus(int line, int column, Object left, Object right) {
PlusNode node = new PlusNode();
node.setLeft((Node)left);
node.setRight((Node)right);
setPosition(node, line, column);
return node;
}
/** */
public Object newMinus(int line, int column, Object left, Object right) {
MinusNode node = new MinusNode();
node.setLeft((Node)left);
node.setRight((Node)right);
setPosition(node, line, column);
return node;
}
/** */
public Object newMultiply(int line, int column, Object left, Object right) {
MultiplyNode node = new MultiplyNode();
node.setLeft((Node)left);
node.setRight((Node)right);
setPosition(node, line, column);
return node;
}
/** */
public Object newDivide(int line, int column, Object left, Object right) {
DivideNode node = new DivideNode();
node.setLeft((Node)left);
node.setRight((Node)right);
setPosition(node, line, column);
return node;
}
// ------------------------------------------
// Unary expression nodes
// ------------------------------------------
/** */
public Object newUnaryPlus(int line, int column, Object arg) {
return arg;
}
/** */
public Object newUnaryMinus(int line, int column, Object arg) {
UnaryMinus node = new UnaryMinus();
node.setLeft((Node)arg);
setPosition(node, line, column);
return node;
}
/** */
public Object newNot(int line, int column, Object arg) {
NotNode node = new NotNode();
node.setLeft((Node)arg);
setPosition(node, line, column);
return node;
}
// ------------------------------------------
// Conditional expression nodes
// ------------------------------------------
/** */
public Object newBetween(int line, int column, boolean not, Object arg,
Object lower, Object upper) {
BetweenNode node = new BetweenNode();
node.setLeft((Node)arg);
node.setRightForBetween((Node)lower);
node.setRightForAnd((Node)upper);
setPosition(node, line, column);
return not? newNot(line, column, node) : node;
}
/** */
public Object newLike(int line, int column, boolean not, Object string,
Object pattern, Object escape) {
LikeNode node = new LikeNode();
node.setLeft((Node)string);
node.setRight((Node)pattern);
node.setEscapeNode((EscapeNode)escape);
setPosition(node, line, column);
return not ? newNot(line, column, node) : node;
}
/** */
public Object newEscape(int line, int column, Object arg) {
EscapeNode node = new EscapeNode();
node.setLeft((Node)arg);
setPosition(node, line, column);
return node;
}
/** */
public Object newIn(int line, int column,
boolean not, Object expr, List items) {
InNode node = new InNode();
if (not) node.indicateNot();
node.setLeft((Node)expr);
node.setTheObjects(items);
setPosition(node, line, column);
return node;
}
/** */
public Object newIsNull(int line, int column, boolean not, Object expr) {
NullComparisonNode node = new NullComparisonNode();
node.setLeft((Node)expr);
setPosition(node, line, column);
return not ? newNot(line, column, node) : node;
}
/** */
public Object newIsEmpty(int line, int column, boolean not, Object expr) {
EmptyCollectionComparisonNode node =
new EmptyCollectionComparisonNode();
node.setLeft((Node)expr);
if (not) node.indicateNot();
setPosition(node, line, column);
return node;
}
/** */
public Object newMemberOf(int line, int column,
boolean not, Object expr, Object collection) {
MemberOfNode node = new MemberOfNode();
node.setLeft((Node)expr);
node.setRight((Node)collection);
if (not) node.indicateNot();
setPosition(node, line, column);
return node;
}
// ------------------------------------------
// Parameter nodes
// ------------------------------------------
/** */
public Object newPositionalParameter(int line, int column, String position) {
ParameterNode node = new ParameterNode(position);
context.addParameter(position);
setPosition(node, line, column);
return node;
}
/** */
public Object newNamedParameter(int line, int column, String name) {
ParameterNode node = new ParameterNode(name);
context.addParameter(name);
setPosition(node, line, column);
return node;
}
// ------------------------------------------
// Literal nodes
// ------------------------------------------
/** */
public Object newBooleanLiteral(int line, int column, Object value) {
BooleanLiteralNode node = new BooleanLiteralNode();
node.setLiteral(value);
setPosition(node, line, column);
return node;
}
/** */
public Object newIntegerLiteral(int line, int column, Object value) {
IntegerLiteralNode node = new IntegerLiteralNode();
node.setLiteral(value);
setPosition(node, line, column);
return node;
}
/** */
public Object newLongLiteral(int line, int column, Object value) {
LongLiteralNode node = new LongLiteralNode();
node.setLiteral(value);
setPosition(node, line, column);
return node;
}
/** */
public Object newFloatLiteral(int line, int column, Object value) {
FloatLiteralNode node = new FloatLiteralNode();
node.setLiteral(value);
setPosition(node, line, column);
return node;
}
/** */
public Object newDoubleLiteral(int line, int column, Object value) {
DoubleLiteralNode node = new DoubleLiteralNode();
node.setLiteral(value);
setPosition(node, line, column);
return node;
}
/** */
public Object newStringLiteral(int line, int column, Object value) {
StringLiteralNode node = new StringLiteralNode();
node.setLiteral(value);
setPosition(node, line, column);
return node;
}
/** */
public Object newNullLiteral(int line, int column) {
LiteralNode node = new LiteralNode();
node.setLiteral(null);
setPosition(node, line, column);
return node;
}
// ------------------------------------------
// Objects for functions returning strings
// ------------------------------------------
/** */
public Object newConcat(int line, int column, Object left, Object right) {
ConcatNode node = new ConcatNode();
node.setLeft((Node)left);
node.setRight((Node)right);
setPosition(node, line, column);
return node;
}
/** */
public Object newSubstring(int line, int column,
Object string, Object start, Object length) {
SubstringNode node = new SubstringNode();
node.setLeft((Node)string);
node.setStartPosition((Node)start);
node.setStringLength((Node)length);
setPosition(node, line, column);
return node;
}
/** */
public Object newTrim(int line, int column, TrimSpecification trimSpec,
Object trimChar, Object string) {
TrimNode node = new TrimNode();
node.setLeft((Node)string);
node.setTrimChar((Node)trimChar);
switch (trimSpec) {
case LEADING:
node.setLeading(true);
break;
case TRAILING:
node.setTrailing(true);
break;
case BOTH:
node.setBoth(true);
break;
}
setPosition(node, line, column);
return node;
}
/** */
public Object newLower(int line, int column, Object arg) {
LowerNode node = new LowerNode();
node.setLeft((Node)arg);
setPosition(node, line, column);
return node;
}
/** */
public Object newUpper(int line, int column, Object arg) {
UpperNode node = new UpperNode();
node.setLeft((Node)arg);
setPosition(node, line, column);
return node;
}
// ------------------------------------------
// Objects for functions returning numerics
// ------------------------------------------
/** */
public Object newLocate(int line, int column,
Object pattern, Object arg, Object startPos) {
LocateNode node = new LocateNode();
node.setFind((Node)pattern);
node.setFindIn((Node)arg);
node.setStartPosition((Node)startPos);
setPosition(node, line, column);
return node;
}
/** */
public Object newLength(int line, int column, Object arg) {
LengthNode node = new LengthNode();
node.setLeft((Node)arg);
setPosition(node, line, column);
return node;
}
/** */
public Object newAbs(int line, int column, Object arg) {
AbsNode node = new AbsNode();
node.setLeft((Node)arg);
setPosition(node, line, column);
return node;
}
/** */
public Object newSqrt(int line, int column, Object arg) {
SqrtNode node = new SqrtNode();
node.setLeft((Node)arg);
setPosition(node, line, column);
return node;
}
/** */
public Object newMod(int line, int column, Object left, Object right) {
ModNode node = new ModNode();
node.setLeft((Node)left);
node.setDenominator((Node)right);
setPosition(node, line, column);
return node;
}
/** */
public Object newSize(int line, int column, Object arg) {
SizeNode node = new SizeNode();
node.setLeft((Node)arg);
setPosition(node, line, column);
return node;
}
// ------------------------------------------
// Objects for functions returning datetime
// ------------------------------------------
/** */
public Object newCurrentDate(int line, int column) {
DateFunctionNode node = new DateFunctionNode();
node.useCurrentDate();
setPosition(node, line, column);
return node;
}
/** */
public Object newCurrentTime(int line, int column) {
DateFunctionNode node = new DateFunctionNode();
node.useCurrentTime();
setPosition(node, line, column);
return node;
}
/** */
public Object newCurrentTimestamp(int line, int column) {
DateFunctionNode node = new DateFunctionNode();
node.useCurrentTimestamp();
setPosition(node, line, column);
return node;
}
// ------------------------------------------
// Subquery nodes
// ------------------------------------------
/** */
public Object newSubquery(int line, int column,
Object select, Object from, Object where,
Object groupBy, Object having) {
QueryNode queryNode = (QueryNode)select;
EJBQLParseTree tree = new EJBQLParseTree();
queryNode.setParseTree(tree);
tree.setQueryNode(queryNode);
tree.setFromNode((FromNode)from);
tree.setWhereNode((WhereNode)where);
tree.setGroupByNode((GroupByNode)groupBy);
tree.setHavingNode((HavingNode)having);
tree.setContext(context);
SubqueryNode node = new SubqueryNode();
node.setParseTree(tree);
setPosition(node, line, column);
return node;
}
/** */
public Object newExists(int line, int column, boolean not, Object subquery) {
ExistsNode node = new ExistsNode();
if (not) node.indicateNot();
node.setLeft((Node)subquery);
setPosition(node, line, column);
return node;
}
/** */
public Object newIn(int line, int column,
boolean not, Object expr, Object subquery) {
InNode node = new InNode();
if (not) node.indicateNot();
node.setLeft((Node)expr);
node.addNodeToTheObjects((Node)subquery);
setPosition(node, line, column);
return node;
}
/** */
public Object newAll(int line, int column, Object subquery) {
AllNode node = new AllNode();
node.setLeft((Node)subquery);
setPosition(node, line, column);
return node;
}
/** */
public Object newAny(int line, int column, Object subquery) {
AnyNode node = new AnyNode();
node.setLeft((Node)subquery);
setPosition(node, line, column);
return node;
}
/** */
public Object newSome(int line, int column, Object subquery) {
SomeNode node = new SomeNode();
node.setLeft((Node)subquery);
setPosition(node, line, column);
return node;
}
// ------------------------------------------
// Miscellaneous nodes
// ------------------------------------------
/** */
public Object newAscOrdering(int line, int column, Object arg) {
OrderByItemNode node = new OrderByItemNode();
SortDirectionNode sortDirection = new SortDirectionNode();
sortDirection.useAscending();
node.setDirection(sortDirection);
node.setOrderByItem((Node)arg);
setPosition(node, line, column);
return node;
}
/** */
public Object newDescOrdering(int line, int column, Object arg) {
OrderByItemNode node = new OrderByItemNode();
SortDirectionNode sortDirection = new SortDirectionNode();
sortDirection.useDescending();
node.setDirection(sortDirection);
node.setOrderByItem((Node)arg);
setPosition(node, line, column);
return node;
}
/** */
public Object newConstructor(int line, int column,
String className, List args) {
ConstructorNode node = new ConstructorNode(className);
node.setConstructorItems(args);
setPosition(node, line, column);
return node;
}
/** */
public Object newSetClause(int line, int column, List assignments) {
SetNode node = new SetNode();
node.setAssignmentNodes(assignments);
setPosition(node, line, column);
return node;
}
/** */
public Object newSetAssignmentClause(int line, int column,
Object target, Object value) {
EqualsAssignmentNode node = new EqualsAssignmentNode();
node.setLeft((Node)target);
node.setRight((Node)value);
return node;
}
// ------------------------------------------
// Helper methods
// ------------------------------------------
/** */
private void setPosition(Node node, int line, int column) {
node.setLine(line);
node.setColumn(column);
}
/** */
private void registerSchema(String variable, String schema, int line, int column) {
if (variable != null) {
context.registerSchema(variable, schema, line, column);
}
else {
// UPDATE and DELETE may not define a variable =>
// use schema name as variable
context.registerSchema(calculateCanonicalName(schema), schema, line, column);
}
}
/** */
private String calculateCanonicalName(String name) {
return (name == null) ? null :
IdentificationVariableDeclNode.calculateCanonicalName(name);
}
}