Package org.apache.jackrabbit.oak.query.ast

Class DescendantNodeJoinConditionImpl

java.lang.Object

org.apache.jackrabbit.oak.query.ast.JoinConditionImpl

org.apache.jackrabbit.oak.query.ast.DescendantNodeJoinConditionImpl

public class DescendantNodeJoinConditionImpl
extends JoinConditionImpl

The "isdescendantnode(...)" join condition.

Field Summary

Fields

Modifier and Type	Field	Description
protected QueryImpl	query

Fields inherited from class org.apache.jackrabbit.oak.query.ast.JoinConditionImpl

KNOWN_PARENT_PATH, KNOWN_PATH, KNOWN_VALUE, SPECIAL_PATH_PREFIX

Constructor Summary

Constructors

Constructor	Description
DescendantNodeJoinConditionImpl(String descendantSelectorName, String ancestorSelectorName)

Method Summary

Modifier and Type	Method	Description
void	bindSelector(SourceImpl source)
boolean	canEvaluate(Set<SourceImpl> available)	Whether the join condition can be evaluated if the given selectors are able to retrieve data.
protected PropertyValue	convertValueToType(PropertyValue v, PropertyValue targetType)
org.apache.jackrabbit.oak.query.ast.AstElement	copyOf()
boolean	evaluate()	Evaluate the result using the currently set values.
protected String	getLocalPath(String path)	Calculate the session local path (the path excluding the workspace name) if possible.
boolean	isParent(SourceImpl source)	Check whether the given source is the parent of the join condition, as selector "[b]" is the parent of the join condition "isdescendantnode([a], [b])".
protected String	normalizePath(String path)	Validate and normalize the path.
protected String	normalizePropertyName(String propertyName)	Normalize the property name (including namespace remapping).
protected String	protect(Object expression)
protected static String	quote(String pathOrName)
protected static String	quoteJson(String string)
void	restrict(FilterImpl f)	Apply the condition to the filter, further restricting the filter if possible.
void	restrictPushDown(SelectorImpl s)	Push as much of the condition down to this selector, further restricting the selector condition if possible.
void	setQuery(QueryImpl query)
String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

query

protected QueryImpl query

Constructor Detail

DescendantNodeJoinConditionImpl

public DescendantNodeJoinConditionImpl(String descendantSelectorName,
                                       String ancestorSelectorName)

Method Detail

toString

public String toString()

Overrides:

toString in class Object

bindSelector

public void bindSelector(SourceImpl source)

evaluate

public boolean evaluate()

Description copied from class: JoinConditionImpl

Evaluate the result using the currently set values.

Specified by:

evaluate in class JoinConditionImpl

Returns:

true if the constraint matches

restrict

public void restrict(FilterImpl f)

Description copied from class: JoinConditionImpl

Apply the condition to the filter, further restricting the filter if possible. This may also verify the data types are compatible, and that paths are valid.

Specified by:

restrict in class JoinConditionImpl

Parameters:

f - the filter

restrictPushDown

public void restrictPushDown(SelectorImpl s)

Description copied from class: JoinConditionImpl

Push as much of the condition down to this selector, further restricting the selector condition if possible.

Specified by:

restrictPushDown in class JoinConditionImpl

Parameters:

s - the selector

isParent

public boolean isParent(SourceImpl source)

Description copied from class: JoinConditionImpl

Check whether the given source is the parent of the join condition, as selector "[b]" is the parent of the join condition "isdescendantnode([a], [b])".

Specified by:

isParent in class JoinConditionImpl

Parameters:

source - the source

Returns:

true if the source is the parent

canEvaluate

public boolean canEvaluate(Set<SourceImpl> available)

Description copied from class: JoinConditionImpl

Whether the join condition can be evaluated if the given selectors are able to retrieve data.

Specified by:

canEvaluate in class JoinConditionImpl

Parameters:

available - the available selectors

Returns:

true if the condition can be evaluated

copyOf

public org.apache.jackrabbit.oak.query.ast.AstElement copyOf()

Returns:

a clone of self. Default implementation in AstElement returns same reference to this.

protect

protected String protect(Object expression)

quote

protected static String quote(String pathOrName)

quoteJson

protected static String quoteJson(String string)

setQuery

public void setQuery(QueryImpl query)

normalizePropertyName

protected String normalizePropertyName(String propertyName)

Normalize the property name (including namespace remapping). Asterisks are kept.

Parameters:

propertyName - the property name to normalize

Returns:

the normalized (oak-) property name

normalizePath

protected String normalizePath(String path)

Validate and normalize the path.

Parameters:

path - the path to validate

Returns:

the validated and normalized path

convertValueToType

protected PropertyValue convertValueToType(PropertyValue v,
                                           PropertyValue targetType)

getLocalPath

protected String getLocalPath(String path)

Calculate the session local path (the path excluding the workspace name) if possible.

Parameters:

path - the absolute path

Returns:

the session local path, or null if not within this workspace