org.apache.jdo.impl.jdoql.jdoqlc
Class VariableChecker

java.lang.Object
  org.apache.jdo.impl.jdoql.jdoqlc.VariableChecker

public class VariableChecker
extends java.lang.Object

Checks variable declarations/application.

Version:

0.1

Author:

Michael Bouschen

Field Summary

protected static org.apache.jdo.util.I18NHelper	msg I18N support
protected java.util.Map	varInfos Map of variable infos

Constructor Summary

VariableChecker()
Create an empty variable table

VariableChecker(VariableChecker other)
Create a variable table initialized with the entries of the other variable table.

Method Summary

void	add(java.lang.String name) Creates a new entry in the variable table with the specified name as key and an empty value.
protected void	attachConstraintToUsedAST(org.apache.jdo.impl.jdoql.jdoqlc.VariableChecker.VarInfo info)
protected void	checkConstraint(java.lang.String variable, org.apache.jdo.impl.jdoql.jdoqlc.VariableChecker.VarInfo info)
void	checkConstraints()
void	markConstraint(JDOQLAST variable, JDOQLAST expr) Mark the specified variable as constaint with the specified expr.
void	markUsed(JDOQLAST variable, java.lang.String dependendVar) Mark the specified variable as used.
void	merge(VariableChecker other) Merges the specified variable table (other) into this variable table.

Methods inherited from class java.lang.Object

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

Field Detail

msg

protected static final org.apache.jdo.util.I18NHelper msg

I18N support

varInfos

protected java.util.Map varInfos

Map of variable infos

Constructor Detail

VariableChecker

public VariableChecker()

Create an empty variable table

VariableChecker

public VariableChecker(VariableChecker other)

Create a variable table initialized with the entries of the other variable table. The constructor creates copies of the values stored in the map (instances of class VarInfo).

Method Detail

add

public void add(java.lang.String name)

Creates a new entry in the variable table with the specified name as key and an empty value.

markUsed

public void markUsed(JDOQLAST variable,
                     java.lang.String dependendVar)

Mark the specified variable as used. The method sets the info field of the VarInfo object to true.

markConstraint

public void markConstraint(JDOQLAST variable,
                           JDOQLAST expr)

Mark the specified variable as constaint with the specified expr. The method sets the constraint field of the VarInfo object to true.

merge

public void merge(VariableChecker other)

Merges the specified variable table (other) into this variable table.

checkConstraints

public void checkConstraints()

checkConstraint

protected void checkConstraint(java.lang.String variable,
                               org.apache.jdo.impl.jdoql.jdoqlc.VariableChecker.VarInfo info)

attachConstraintToUsedAST

protected void attachConstraintToUsedAST(org.apache.jdo.impl.jdoql.jdoqlc.VariableChecker.VarInfo info)