openjava.ptree
Class SetExpression

java.lang.Object
  |
  +--openjava.ptree.ParseTreeObject
        |
        +--openjava.ptree.NonLeaf
              |
              +--openjava.ptree.SetExpression

All Implemented Interfaces:

Cloneable, Expression, ParseTree, VariableInitializer

Direct Known Subclasses:

InsertExpression, JoinExpression, QueryExpression

public abstract class SetExpression

extends NonLeaf

implements Expression

A SetExpression is an expression which consists of a set of rows. (Other expressions, such as variable references, may have set types also.)

Field Summary

private OJClass

rowType

Fields inherited from class openjava.ptree.NonLeaf

Fields inherited from class openjava.ptree.ParseTreeObject

debugFlag, debugLevel, LN, out, writerStack

Constructor Summary

SetExpression()

Method Summary

protected abstract OJClass	deriveRowType(Environment env)
Expression[]	flatten()
static Expression[]	flatten(Expression expression)
private static void	flattenRecurse(Expression expression, Vector v)
OJClass	getRowType(Environment env)
OJClass	getType(Environment env)

Methods inherited from class openjava.ptree.NonLeaf

childrenAccept, childrenAreEqual, elementAt, equals, getComment, getContents, getLength, makeRecursiveCopy, replaceChildWith, set, set, set, set, set, set, set, set, set, setComment, setElementAt, writeCode

Methods inherited from class openjava.ptree.ParseTreeObject

accept, clone, eq, eq, equal, flushPrintWriter, getDebugFlag, getNest, getObjectID, getParent, getPrintWriter, getTab, hashCode, lastObjectID, makeCopy, popNest, popPrintWriter, pushNest, pushPrintWriter, replace, setDebugFlag, setDebugLevel, setNest, setParent, setPrintStream, setTab, toFlattenString, toString, writeDebug, writeDebugL, writeDebugLln, writeDebugln, writeDebugLR, writeDebugR, writeDebugRln, writeTab

Methods inherited from class java.lang.Object

equals, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface openjava.ptree.ParseTree

accept, childrenAccept, eq, equals, getObjectID, makeCopy, makeRecursiveCopy, replace, toFlattenString, toString, writeCode

Field Detail

rowType

private OJClass rowType

Constructor Detail

SetExpression

public SetExpression()

Method Detail

getRowType

public OJClass getRowType(Environment env)

Specified by:

getRowType in interface Expression

Overrides:

getRowType in class NonLeaf

deriveRowType

protected abstract OJClass deriveRowType(Environment env)
                                  throws Exception

Exception

getType

public OJClass getType(Environment env)

Specified by:

getType in interface Expression

flatten

public Expression[] flatten()

flatten

public static Expression[] flatten(Expression expression)

flattenRecurse

private static void flattenRecurse(Expression expression,
                                   Vector v)