condor.classad
Class AttrRef

Object
  |
  +--condor.classad.Expr
        |
        +--condor.classad.AttrRef

public class AttrRef

extends Expr

A reference to another attribute. A leaf node in an expression tree that represents an attribute reference.

Version:

2.0

Author:

Marvin Solomon

See Also:

Expr, RecordExpr

Nested Class Summary

Nested classes inherited from class condor.classad.Expr

Expr.Env

Field Summary

AttrName

name The string name associated with this reference.

Fields inherited from class condor.classad.Expr

ABSOLUTE_TIME, AND, ATTRIBUTE, BIT_COMPLEMENT, BITAND, BITOR, BITXOR, BOOLEAN, CALL, COND, dateAndTimeFormat, dateFormat, dblevel, DIFFERENT, DIV, EQUAL, ERROR, GREATER, GREATER_EQ, INTEGER, LEFT_SHIFT, LESS, LESS_EQ, LIST, MAXPREC, MINUS, MOD, NOT, NOT_EQUAL, OP, opName, opNameXML, OR, PLUS, REAL, RECORD, RELATIVE_TIME, RIGHT_SHIFT, SAME, SELECTION, STRING, SUBSCRIPT, TIMES, type, UMINUS, UNDEFINED, UPLUS, URIGHT_SHIFT

Constructor Summary

AttrRef(AttrName name)
Create a new AttrRef.

AttrRef(String name)
Create a new AttrRef.

Method Summary

protected Expr	eval1(Expr.Env env) Evaluate this Expr.
int	prec() The precedence of this expression
String	toString() Convert this AttrRef to a string.
StringBuffer	toString(StringBuffer sb) Convert this Expr to a string, appending the result to the end of "sb".

Methods inherited from class condor.classad.Expr

db, db, eval, eval, intValue, isConstant, isTrue, realValue, selectExpr, stringValue, subExpr, typeName

Methods inherited from class Object

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

Field Detail

name

public final AttrName name

The string name associated with this reference.

Constructor Detail

AttrRef

public AttrRef(AttrName name)

Create a new AttrRef.

Parameters:

name - the string name associated with this reference.

AttrRef

public AttrRef(String name)

Create a new AttrRef.

Parameters:

name - the string name associated with this reference.

Method Detail

toString

public String toString()

Convert this AttrRef to a string.

Overrides:

toString in class Expr

Returns:

a string representation of this Expr

See Also:

ClassAdWriter

toString

public StringBuffer toString(StringBuffer sb)

Convert this Expr to a string, appending the result to the end of "sb". The representation is the "canonical native format".

Specified by:

toString in class Expr

Parameters:

sb - a place to put the result.

Returns:

sb.

See Also:

ClassAdWriter

eval1

protected Expr eval1(Expr.Env env)

Evaluate this Expr. This is the internal method used to implement Expr.eval(). The env is searched for name of this AttrRef. Scopes that do not define that name are popped off the stack, leaving the scope defining the name at the top. If the name is not found in any of the scopes, the env becomes the empty environment, and the result is the UNDEFINED constant.

Specified by:

eval1 in class Expr

Parameters:

env - the environment to search for the name. It is modified in place to indicate where the name was resolved.

Returns:

a Constant, AttrRef, ListExpr, or RecordExpr representing the value.

prec

public int prec()

The precedence of this expression

Specified by:

prec in class Expr

Returns:

the precendence of this node (MAXPREC).

See Also:

ClassAdWriter.MINIMAL_PARENTHESES