net.sf.saffron.oj.util
Class UnboundVariableCollector

java.lang.Object
  |
  +--net.sf.saffron.rex.RexShuttle
        |
        +--net.sf.saffron.oj.util.UnboundVariableCollector

public class UnboundVariableCollector

extends RexShuttle

Finds all unbound varaibles in a relational expression

See Also:

collectFromRel(net.sf.saffron.rel.SaffronRel)

Field Summary

(package private) Environment	env
(package private) Hashtable	mapNameToClass

Constructor Summary

(package private)

UnboundVariableCollector(Environment env)

Method Summary

static UnboundVariableCollector	collectFromRel(SaffronRel rel) Returns a description of what variables are unbound inside rel.
ExpressionList	getArgumentList() Returns an argument list value0, ..., valueN containing all variables valueivalue in this cluster's expression.
StatementList	getAssignmentList() Returns a set of assignments to member variables: this.value0 = value0; ...; this.valueN = valueN; return this;.
MemberDeclarationList	getMemberDeclarationList() Returns a set of declarations of members to hold variables: private Class0 value0; ...; private ClassN valueN;.
ParameterList	getParameterList() Returns a parameter list Class0 value0, ..., ClassN valueN containing all of the unbound variables valueivalue in this cluster's expression.
RexNode	visit(RexCorrelVariable v)

Methods inherited from class net.sf.saffron.rex.RexShuttle

visit, visit, visit, visit

Methods inherited from class java.lang.Object

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

Field Detail

env

Environment env

mapNameToClass

Hashtable mapNameToClass

Constructor Detail

UnboundVariableCollector

UnboundVariableCollector(Environment env)

Method Detail

collectFromRel

public static UnboundVariableCollector collectFromRel(SaffronRel rel)

Returns a description of what variables are unbound inside rel.

getArgumentList

public ExpressionList getArgumentList()

Returns an argument list value0, ..., valueN containing all variables valueivalue in this cluster's expression.

getAssignmentList

public StatementList getAssignmentList()

Returns a set of assignments to member variables: this.value0 = value0; ...; this.valueN = valueN; return this;.

getMemberDeclarationList

public MemberDeclarationList getMemberDeclarationList()

Returns a set of declarations of members to hold variables: private Class0 value0; ...; private ClassN valueN;.

getParameterList

public ParameterList getParameterList()

Returns a parameter list Class0 value0, ..., ClassN valueN containing all of the unbound variables valueivalue in this cluster's expression.

visit

public RexNode visit(RexCorrelVariable v)

Overrides:

visit in class RexShuttle