org.eigenbase.lurql
Class LurqlFilter

java.lang.Object
  org.eigenbase.lurql.LurqlQueryNode
      org.eigenbase.lurql.LurqlFilter

public class LurqlFilter
extends LurqlQueryNode

LurqlFilter represents a filter condition in a LURQL query. Currently the only filters supported are of the form

• ATTRIBUTE = 'VALUE'
• ATTRIBUTE = ?scalar-param
• ATTRIBUTE MATCHES 'PATTERN'
• ATTRIBUTE IN ('VALUE1', 'VALUE2', ...)
• ATTRIBUTE IN ?set-param
• ATTRIBUTE IN [SQL-QUERY]
• EXISTS (path-spec)

or negations, e.g. NOT ATTRIBUTE = 'VALUE' TODO jvs 6-July-2006: refactor into LurqlExistsFilter, LurqlComparisonFilter

Version:

$Id: //open/dev/farrago/src/org/eigenbase/lurql/LurqlFilter.java#1 $

Author:

John V. Sichi

Field Summary

private String	attributeName
static LurqlFilter[]	EMPTY_ARRAY
private LurqlExists	exists
private boolean	hasDynamicParams
private boolean	isNegated
private boolean	isPattern
private Matcher	matcher
static Object	NULL_VALUE Sentinel object distinguishing NULL from any real value.
private LurqlDynamicParam	setParam
private String	sqlQuery
private Set<Object>	values

Constructor Summary

LurqlFilter(LurqlExists exists)

LurqlFilter(String attributeName, LurqlDynamicParam param)

LurqlFilter(String attributeName, Set<Object> values)

LurqlFilter(String attributeName, Set<Object> values, boolean isPattern)

LurqlFilter(String attributeName, String sqlQuery)

Method Summary

String	getAttributeName()
LurqlExists	getExists()
LurqlDynamicParam	getSetParam()
String	getSqlQuery()
Set	getValues()
boolean	hasDynamicParams()
boolean	isMofId()
boolean	isNegated()
boolean	isPattern()
boolean	patternMatch(String patternString, String value)
void	setNegated()
void	unparse(PrintWriter pw) Converts this node to text.
private void	unparseValue(PrintWriter pw, Object value)

Methods inherited from class org.eigenbase.lurql.LurqlQueryNode

toString, unparseFilterList

Methods inherited from class java.lang.Object

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

Field Detail

EMPTY_ARRAY

public static final LurqlFilter[] EMPTY_ARRAY

NULL_VALUE

public static final Object NULL_VALUE

Sentinel object distinguishing NULL from any real value.

attributeName

private final String attributeName

values

private final Set<Object> values

sqlQuery

private final String sqlQuery

setParam

private final LurqlDynamicParam setParam

exists

private final LurqlExists exists

isPattern

private final boolean isPattern

hasDynamicParams

private boolean hasDynamicParams

isNegated

private boolean isNegated

matcher

private Matcher matcher

Constructor Detail

LurqlFilter

public LurqlFilter(String attributeName,
                   Set<Object> values)

LurqlFilter

public LurqlFilter(String attributeName,
                   Set<Object> values,
                   boolean isPattern)

LurqlFilter

public LurqlFilter(String attributeName,
                   String sqlQuery)

LurqlFilter

public LurqlFilter(String attributeName,
                   LurqlDynamicParam param)

LurqlFilter

public LurqlFilter(LurqlExists exists)

Method Detail

getExists

public LurqlExists getExists()

getAttributeName

public String getAttributeName()

getSqlQuery

public String getSqlQuery()

getValues

public Set getValues()

isMofId

public boolean isMofId()

isPattern

public boolean isPattern()

patternMatch

public boolean patternMatch(String patternString,
                            String value)

hasDynamicParams

public boolean hasDynamicParams()

isNegated

public boolean isNegated()

getSetParam

public LurqlDynamicParam getSetParam()

setNegated

public void setNegated()

unparse

public void unparse(PrintWriter pw)

Description copied from class: LurqlQueryNode

Converts this node to text.

Specified by:

unparse in class LurqlQueryNode

Parameters:

pw - the PrintWriter on which to unparse; must have an underlying StackWriter to interpret indentation

unparseValue

private void unparseValue(PrintWriter pw,
                          Object value)