condor.classad
Class SubscriptExpr

java.lang.Object
  |
  +--condor.classad.Expr
        |
        +--condor.classad.SubscriptExpr

public class SubscriptExpr

extends Expr

A selection from a list. An internal (non-leaf) node of an expression tree representing a subscript applied to another expression (which presumedly evaluates to a list).

Version:

1.2

Author:

Marvin Solomon

See Also:

Expr

Fields inherited from class condor.classad.Expr

ABSOLUTE_TIME, AND, ATTRIBUTE, BIT_COMPLEMENT, BITAND, BITOR, BITXOR, BOOLEAN, BRIEF, CALL, COMPACT, COND, dblevel, DIFFERENT, DIV, EQUAL, ERROR, formatFlags, formatIndent, GREATER, GREATER_EQ, INTEGER, LEFT_SHIFT, LESS, LESS_EQ, LIST, MAXPREC, MINIMAL_PARENTHESES, MINUS, MOD, MULTI_LINE_ADS, MULTI_LINE_LISTS, NO_ESCAPE_STRINGS, NOT, NOT_EQUAL, OP, opName, OR, PLUS, READABLE, REAL, RECORD, RELATIVE_TIME, RIGHT_SHIFT, SAME, SELECTION, SHOW_ERROR_DETAIL, SHOW_INSTANCES, STRING, SUBSCRIPT, TIMES, type, UMINUS, UNDEFINED, UPLUS, URIGHT_SHIFT

Constructor Summary

SubscriptExpr(Expr base, Expr selector)
Create a new SubscriptExpr.

Method Summary

protected int	prec() The precedence of the operator in this expression node.
protected Expr	reEval(Context ctx) Evalutate this expression.
String	toString() Convert this Expr to a string.
protected String	typeName() The type of the expression.

Methods inherited from class condor.classad.Expr

db, db, disableFormatFlags, enableFormatFlags, eval, getFormatFlags, isConstant, isNormalForm, mark, mark, mark, select, setFormatFlags, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

SubscriptExpr

public SubscriptExpr(Expr base,
                     Expr selector)

Create a new SubscriptExpr.

Parameters:

base - the left argument (base expression).

selector - the right argument (subscript).

Method Detail

typeName

protected String typeName()

The type of the expression. This should never be called!

Overrides:

typeName in class Expr

Returns:

the string "selection".

toString

public String toString()

Convert this Expr to a string. The exact format of the result is controled by the static fields Expr.formatFlags and Expr.formatIndent. The result may be multiple lines long (it may include embedded newlines and tabs), but it never ends with a newline.

Overrides:

toString in class Expr

Returns:

a string representation of the this Context

See Also:

Expr.formatFlags, Expr.formatIndent

prec

protected int prec()

The precedence of the operator in this expression node. Used to print expressions without superfluous parentheses.

Overrides:

prec in class Expr

Returns:

the precendence of this node.

See Also:

Expr.MINIMAL_PARENTHESES

reEval

protected Expr reEval(Context ctx)

Evalutate this expression.

Overrides:

reEval in class Expr

Parameters:

ctx - an evaluation context for evaluating this expression

Returns:

a Constant, ListExpr, or RecordExpr representing the value.

See Also:

Expr.eval(condor.classad.Context)