Class NonStaticMethodCallNode

java.lang.Object

org.apache.derby.impl.sql.compile.QueryTreeNode

org.apache.derby.impl.sql.compile.JavaValueNode

org.apache.derby.impl.sql.compile.MethodCallNode

org.apache.derby.impl.sql.compile.NonStaticMethodCallNode

All Implemented Interfaces:

Visitable

class NonStaticMethodCallNode
extends MethodCallNode

A NonStaticMethodCallNode is really a node to represent a (static or non-static) method call from an object (as opposed to a static method call from a class.

Field Summary

Fields

Modifier and Type	Field	Description
private boolean	isStatic
(package private) JavaValueNode	receiver

Fields inherited from class MethodCallNode

actualMethodReturnType, internalCall, javaClassName, method, methodName, methodParameterTypes, methodParms, routineInfo, signature

Fields inherited from class JavaValueNode

forCallStatement, jsqlType

Fields inherited from class QueryTreeNode

AUTOINCREMENT_CREATE_MODIFY, AUTOINCREMENT_CYCLE, AUTOINCREMENT_INC_INDEX, AUTOINCREMENT_IS_AUTOINCREMENT_INDEX, AUTOINCREMENT_START_INDEX

Constructor Summary

Constructors

Constructor	Description
NonStaticMethodCallNode(String methodName, ValueNode receiver, ContextManager cm)	Constructor for a NonStaticMethodCallNode

Method Summary

Modifier and Type	Method	Description
(package private) void	acceptChildren(Visitor v)	Accept the visitor for all visitable children of this node.
(package private) JavaValueNode	bindExpression(FromList fromList, SubqueryList subqueryList, List<AggregateNode> aggregates)	Bind this expression.
(package private) boolean	categorize(JBitSet referencedTabs, boolean simplePredsOnly)	Categorize this predicate.
(package private) void	generateExpression(ExpressionClassBuilder acb, MethodBuilder mb)	Do code generation for this method call
(package private) boolean	generateReceiver(ExpressionClassBuilder acb, MethodBuilder mb)	Generate the expression that evaluates to the receiver.
(package private) int	getOrderableVariantType()	Return the variant type for the underlying expression.
(package private) void	preprocess(int numTables, FromList outerFromList, SubqueryList outerSubqueryList, PredicateList outerPredicateList)	Preprocess an expression tree.
(package private) void	printSubNodes(int depth)	Prints the sub-nodes of this object.
(package private) JavaValueNode	remapColumnReferencesToExpressions()	Remap all ColumnReferences in this tree to be clones of the underlying expression.

Methods inherited from class MethodCallNode

addParms, areParametersQueryInvariant, bindParameters, generateOneParameter, generateParameters, getCorrelationTables, getDataType, getFirstVarargIdx, getFullName, getIsParam, getJavaClassName, getMethodName, getMethodParameterClasses, getMethodParms, getObjectSignature, getObjectTypeName, getParameterTypeName, getPrimitiveSignature, getResolvedMethod, getRoutineArgIdx, getRoutineArgIdx, getRoutineInfo, hasVarargs, isVararg, resolveMethodCall, setNullParameterInfo, someParametersAreNull, stripOneArrayLevel, throwNoMethodFound, toString

Methods inherited from class JavaValueNode

castToPrimitive, checkReliability, generate, generateReceiver, getCollationType, getConstantValueAsObject, getJavaTypeName, getJSQLType, getPrimitiveTypeName, getReceiverExpression, isPrimitiveType, mapToTypeID, markForCallStatement, markReturnValueDiscarded, mustCastToPrimitive, returnValueDiscarded, returnValueToSQLDomain, setCollationType, setJavaTypeName, valueReturnedToSQLDomain

Methods inherited from class QueryTreeNode

accept, addTag, addUDTUsagePriv, addUDTUsagePriv, bindOffsetFetch, bindRowMultiSet, bindUserCatalogType, bindUserType, checkReliability, checkReliability, convertDefaultNode, copyTagsFrom, createTypeDependency, debugFlush, debugPrint, disablePrivilegeCollection, formatNodeString, generateAuthorizeCheck, getBeginOffset, getClassFactory, getCompilerContext, getContext, getContextManager, getDataDictionary, getDependencyManager, getEndOffset, getExecutionFactory, getGenericConstantActionFactory, getIntProperty, getLanguageConnectionContext, getLongProperty, getNullNode, getOffsetOrderedNodes, getOptimizerFactory, getOptimizerTracer, getParameterTypes, getSchemaDescriptor, getSchemaDescriptor, getStatementType, getTableDescriptor, getTypeCompiler, getUDTDesc, isAtomic, isPrivilegeCollectionRequired, isSessionSchema, isSessionSchema, makeConstantAction, makeTableName, makeTableName, nodeHeader, optimizerTracingIsOn, orReliability, parseSearchCondition, parseStatement, printLabel, referencesSessionSchema, resolveTableToSynonym, setBeginOffset, setEndOffset, setRefActionInfo, stackPrint, taggedWith, treePrint, treePrint, verifyClassExist

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Details

receiver

JavaValueNode receiver

isStatic

private boolean isStatic

Constructor Details

NonStaticMethodCallNode

NonStaticMethodCallNode(String methodName,
 ValueNode receiver,
 ContextManager cm)
                 throws StandardException

Constructor for a NonStaticMethodCallNode

Parameters:

methodName - The name of the method to call

receiver - A JavaValueNode representing the receiving object

cm - The context manager

Throws:

StandardException - Thrown on error

Method Details

bindExpression

JavaValueNode bindExpression(FromList fromList,
 SubqueryList subqueryList,
 List<AggregateNode> aggregates)
                      throws StandardException

Bind this expression. This means binding the sub-expressions, as well as figuring out what the return type is for this expression.

Specified by:

bindExpression in class JavaValueNode

Parameters:

fromList - The FROM list for the query this expression is in, for binding columns.

subqueryList - The subquery list being built as we find SubqueryNodes

aggregates - The aggregate list being built as we find AggregateNodes

Returns:

this

Throws:

StandardException - Thrown on error

See Also:

• ValueNode.bindExpression(FromList, SubqueryList, List)

categorize

boolean categorize(JBitSet referencedTabs,
 boolean simplePredsOnly)
            throws StandardException

Categorize this predicate. Initially, this means building a bit map of the referenced tables for each predicate. If the source of this ColumnReference (at the next underlying level) is not a ColumnReference or a VirtualColumnNode then this predicate will not be pushed down. For example, in: select * from (select 1 from s) a (x) where x = 1 we will not push down x = 1. NOTE: It would be easy to handle the case of a constant, but if the inner SELECT returns an arbitrary expression, then we would have to copy that tree into the pushed predicate, and that tree could contain subqueries and method calls. RESOLVE - revisit this issue once we have views.

Overrides:

categorize in class MethodCallNode

Parameters:

referencedTabs - JBitSet with bit map of referenced FromTables

simplePredsOnly - Whether or not to consider method calls, field references and conditional nodes when building bit map

Returns:

boolean Whether or not source.expression is a ColumnReference or a VirtualColumnNode.

Throws:

StandardException - Thrown on error

See Also:

• ValueNode.categorize(JBitSet, boolean)

getOrderableVariantType

int getOrderableVariantType()
                     throws StandardException

Return the variant type for the underlying expression. The variant type can be: VARIANT - variant within a scan (non-static field access) SCAN_INVARIANT - invariant within a scan (column references from outer tables) QUERY_INVARIANT - invariant within the life of a query (constant expressions)

Overrides:

getOrderableVariantType in class MethodCallNode

Returns:

The variant type for the underlying expression.

Throws:

StandardException

remapColumnReferencesToExpressions

JavaValueNode remapColumnReferencesToExpressions()
                                          throws StandardException

Remap all ColumnReferences in this tree to be clones of the underlying expression.

Overrides:

remapColumnReferencesToExpressions in class MethodCallNode

Returns:

JavaValueNode The remapped expression tree.

Throws:

StandardException - Thrown on error

See Also:

• ValueNode.remapColumnReferencesToExpressions()

printSubNodes

void printSubNodes(int depth)

Prints the sub-nodes of this object. See QueryTreeNode.java for how tree printing is supposed to work.

Overrides:

printSubNodes in class MethodCallNode

Parameters:

depth - The depth of this node in the tree

preprocess

void preprocess(int numTables,
 FromList outerFromList,
 SubqueryList outerSubqueryList,
 PredicateList outerPredicateList)
         throws StandardException

Preprocess an expression tree. We do a number of transformations here (including subqueries, IN lists, LIKE and BETWEEN) plus subquery flattening. NOTE: This is done before the outer ResultSetNode is preprocessed.

Overrides:

preprocess in class MethodCallNode

Parameters:

numTables - Number of tables in the DML Statement

outerFromList - FromList from outer query block

outerSubqueryList - SubqueryList from outer query block

outerPredicateList - PredicateList from outer query block

Throws:

StandardException - Thrown on error

See Also:

• ValueNode.preprocess(int, FromList, SubqueryList, PredicateList)

generateExpression

void generateExpression(ExpressionClassBuilder acb,
 MethodBuilder mb)
                 throws StandardException

Do code generation for this method call

Specified by:

generateExpression in class JavaValueNode

Parameters:

acb - The ExpressionClassBuilder for the class we're generating

mb - The method the expression will go into

Throws:

StandardException - Thrown on error

generateReceiver

boolean generateReceiver(ExpressionClassBuilder acb,
 MethodBuilder mb)
                  throws StandardException

Generate the expression that evaluates to the receiver. This is for the case where a java expression is being returned to the SQL domain, and we need to check whether the receiver is null (if so, the SQL value should be set to null, and this Java expression not evaluated). Instance method calls and field references have receivers, while class method calls and calls to constructors do not. If this Java expression does not have a receiver, this method returns null. Only generate the receiver once and cache it in a field. This is because there will be two references to the receiver, and we want to evaluate it only once.

Overrides:

generateReceiver in class JavaValueNode

Parameters:

acb - The ExpressionClassBuilder for the class being built

mb - The method the expression will go into

Returns:

true if compiled receiver, false otherwise.

Throws:

StandardException - Thrown on error

acceptChildren

void acceptChildren(Visitor v)
             throws StandardException

Accept the visitor for all visitable children of this node.

Overrides:

acceptChildren in class MethodCallNode

Parameters:

v - the visitor

Throws:

StandardException - on error