org.apache.derby.impl.sql.compile
Class BitConstantNode

java.lang.Object
  extended by org.apache.derby.impl.sql.compile.QueryTreeNode
      extended by org.apache.derby.impl.sql.compile.ValueNode
          extended by org.apache.derby.impl.sql.compile.ConstantNode
              extended by org.apache.derby.impl.sql.compile.BitConstantNode
All Implemented Interfaces:
Visitable
Direct Known Subclasses:
VarbitConstantNode

public class BitConstantNode
extends ConstantNode


Field Summary
private  int bitLength
           
 
Fields inherited from class org.apache.derby.impl.sql.compile.ConstantNode
value
 
Fields inherited from class org.apache.derby.impl.sql.compile.ValueNode
transformed
 
Fields inherited from class org.apache.derby.impl.sql.compile.QueryTreeNode
AUTOINCREMENT_CREATE_MODIFY, AUTOINCREMENT_INC_INDEX, AUTOINCREMENT_IS_AUTOINCREMENT_INDEX, AUTOINCREMENT_START_INDEX, isPrivilegeCollectionRequired
 
Constructor Summary
BitConstantNode()
           
 
Method Summary
(package private)  void generateConstant(ExpressionClassBuilder acb, MethodBuilder mb)
          This generates the proper constant.
(package private)  java.lang.Object getConstantValueAsObject()
          Return an Object representing the bind time value of this expression tree.
 void init(java.lang.Object arg1)
          Initializer for a BitConstantNode.
 void init(java.lang.Object arg1, java.lang.Object arg2)
          Initialize a query tree node.
 
Methods inherited from class org.apache.derby.impl.sql.compile.ConstantNode
bindExpression, constantExpression, generateExpression, getClone, getOrderableVariantType, getValue, init, isCloneable, isConstantExpression, isEquivalent, isNull, setValue, toString
 
Methods inherited from class org.apache.derby.impl.sql.compile.ValueNode
bindExpression, categorize, changeToCNF, checkIsBoolean, checkTopPredicatesForEqualsConditions, copyFields, eliminateNots, evaluateConstantExpressions, genEqualsFalseTree, generate, generateFilter, genIsNullTree, genSQLJavaSQLTree, getColumnName, getDataValueFactory, getSchemaName, getSourceResultColumn, getTableName, getTablesReferenced, getTransformed, getTypeCompiler, getTypeId, getTypeServices, init, isBinaryEqualsOperatorNode, isBooleanFalse, isBooleanTrue, isInListProbeNode, isParameterNode, isRelationalOperator, isSameNodeType, optimizableEqualityNode, preprocess, putAndsOnTop, remapColumnReferencesToExpressions, requiresTypeFromContext, selectivity, setCollationInfo, setCollationInfo, setCollationUsingCompilationSchema, setCollationUsingCompilationSchema, setNullability, setTransformed, setType, setType, setType, updatableByCursor, verifyChangeToCNF, verifyEliminateNots, verifyPutAndsOnTop
 
Methods inherited from class org.apache.derby.impl.sql.compile.QueryTreeNode
accept, acceptChildren, bindOffsetFetch, bindRowMultiSet, bindUserType, checkReliability, checkReliability, convertDefaultNode, createTypeDependency, debugFlush, debugPrint, disablePrivilegeCollection, formatNodeString, foundString, generateAuthorizeCheck, getBeginOffset, getClassFactory, getCompilerContext, getContextManager, getCursorInfo, getDataDictionary, getDependencyManager, getEndOffset, getExecutionFactory, getGenericConstantActionFactory, getIntProperty, getLanguageConnectionContext, getNodeFactory, getNodeType, getNullNode, getParameterTypes, getRowEstimate, getSchemaDescriptor, getSchemaDescriptor, getStatementType, getTableDescriptor, getTypeCompiler, init, init, init, init, init, init, init, init, init, init, isAtomic, isInstanceOf, isPrivilegeCollectionRequired, isSessionSchema, isSessionSchema, makeConstantAction, makeTableName, makeTableName, nodeHeader, orReliability, parseStatement, printLabel, printSubNodes, referencesSessionSchema, resolveTableToSynonym, setBeginOffset, setContextManager, setEndOffset, setNodeType, setRefActionInfo, stackPrint, treePrint, treePrint, verifyClassExist
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Field Detail

bitLength

private int bitLength
Constructor Detail

BitConstantNode

public BitConstantNode()
Method Detail

init

public void init(java.lang.Object arg1)
          throws StandardException
Initializer for a BitConstantNode.

Overrides:
init in class QueryTreeNode
Parameters:
arg1 - A Bit containing the value of the constant OR The TypeId for the type of the node
Throws:
StandardException

init

public void init(java.lang.Object arg1,
                 java.lang.Object arg2)
          throws StandardException
Description copied from class: QueryTreeNode
Initialize a query tree node.

Overrides:
init in class QueryTreeNode
Throws:
StandardException - Thrown on error

getConstantValueAsObject

java.lang.Object getConstantValueAsObject()
                                    throws StandardException
Return an Object representing the bind time value of this expression tree. If the expression tree does not evaluate to a constant at bind time then we return null. This is useful for bind time resolution of VTIs. RESOLVE: What do we do for primitives?

Overrides:
getConstantValueAsObject in class ValueNode
Returns:
An Object representing the bind time value of this expression tree. (null if not a bind time constant.)
Throws:
StandardException - Thrown on error

generateConstant

void generateConstant(ExpressionClassBuilder acb,
                      MethodBuilder mb)
                throws StandardException
This generates the proper constant. It is implemented by every specific constant node (e.g. IntConstantNode).

Specified by:
generateConstant in class ConstantNode
Parameters:
acb - The ExpressionClassBuilder for the class being built
mb - The method the code to place the code
Throws:
StandardException - Thrown on error

Built on Thu 2010-12-23 20:49:13+0000, from revision ???

Apache Derby V10.6 Internals - Copyright © 2004,2007 The Apache Software Foundation. All Rights Reserved.