org.apache.jackrabbit.oak.query.ast

Class SelectorImpl

java.lang.Object

org.apache.jackrabbit.oak.query.ast.SourceImpl

org.apache.jackrabbit.oak.query.ast.SelectorImpl

public class SelectorImpl
extends SourceImpl

A selector within a query.

Field Summary

Fields

Modifier and Type	Field and Description
protected QueryImpl	query

Constructor Summary

Constructors

Constructor and Description
SelectorImpl(NodeTypeInfo nodeTypeInfo, String selectorName)

Method Summary

Modifier and Type	Method and Description
void	addJoinCondition(JoinConditionImpl joinCondition, boolean forThisSelector) Add the join condition (the ON ...
protected PropertyValue	convertValueToType(PropertyValue v, PropertyValue targetType)
SourceImpl	copyOf()
FilterImpl	createFilter(boolean preparing) Create the filter condition for planning or execution.
PropertyValue	currentOakProperty(String oakPropertyName) Get the property value.
String	currentPath() Get the current absolute Oak path (normalized).
PropertyValue	currentProperty(String propertyName) The value for the given selector for the current node.
PropertyValue	currentProperty(String propertyName, int propertyType) The value for the given selector for the current node, filtered by property type.
@Nullable Tree	currentTree() Get the tree at the current path.
boolean	equals(Object other)
void	execute(NodeState rootState) Execute the query.
SelectorExecutionPlan	getExecutionPlan()
String	getIndexCostInfo(NodeState rootState) Get the index cost as a JSON string.
ArrayList<SourceImpl>	getInnerJoinSelectors() Get all sources that are joined via inner join.
protected String	getLocalPath(String path) Calculate the session local path (the path excluding the workspace name) if possible.
@NotNull Set<String>	getMixinTypes()
String	getNodeType()
String	getPlan(NodeState rootState) Get the query plan.
@NotNull Set<String>	getPrimaryTypes()
QueryImpl	getQuery()
long	getScanCount()
SelectorImpl	getSelector(String selectorName) Get the selector with the given name, or null if not found.
List<ConstraintImpl>	getSelectorConstraints()
String	getSelectorName()
long	getSize(NodeState rootState, Result.SizePrecision precision, long max) Get the size if known.
@NotNull Set<String>	getSupertypes()
Iterable<String>	getWildcardColumns()
int	hashCode()
boolean	isOuterJoinRightHandSide() Whether any selector is the outer-join right hand side.
boolean	isPrepared()
boolean	isVirtualRow()
boolean	matchesAllTypes()
boolean	next() Go to the next node for the given source.
protected String	normalizePath(String path) Validate and normalize the path.
protected String	normalizePropertyName(String propertyName) Normalize the property name (including namespace remapping).
ExecutionPlan	prepare() Prepare executing the query (recursively).
void	prepare(ExecutionPlan p) Re-apply a previously prepared plan.
protected String	protect(Object expression)
protected String	quote(String pathOrName)
protected String	quoteJson(String string)
void	restrictSelector(ConstraintImpl constraint)
void	setOuterJoin(boolean outerJoinLeftHandSide, boolean outerJoinRightHandSide) Set whether this source is the left hand side or right hand side of a left outer join.
void	setQuery(QueryImpl query)
void	setQueryConstraint(ConstraintImpl queryConstraint) Set the complete constraint of the query (the WHERE ...
String	toString()
void	unprepare() Undo a prepare.

Methods inherited from class org.apache.jackrabbit.oak.query.ast.SourceImpl

getExistingSelector, getInnerJoinConditions

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

query

protected QueryImpl query

Constructor Detail

SelectorImpl

public SelectorImpl(NodeTypeInfo nodeTypeInfo,
                    String selectorName)

Method Detail

getSelectorName

public String getSelectorName()

getNodeType

public String getNodeType()

matchesAllTypes

public boolean matchesAllTypes()

getSupertypes

@NotNull
public @NotNull Set<String> getSupertypes()

Returns:

all of the matching supertypes, or empty if the matchesAllTypes flag is set

getPrimaryTypes

@NotNull
public @NotNull Set<String> getPrimaryTypes()

Returns:

all of the matching primary subtypes, or empty if the matchesAllTypes flag is set

getMixinTypes

@NotNull
public @NotNull Set<String> getMixinTypes()

Returns:

all of the matching mixin types, or empty if the matchesAllTypes flag is set

getWildcardColumns

public Iterable<String> getWildcardColumns()

toString

public String toString()

Overrides:

toString in class Object

isPrepared

public boolean isPrepared()

unprepare

public void unprepare()

Description copied from class: SourceImpl

Undo a prepare.

Specified by:

unprepare in class SourceImpl

prepare

public void prepare(ExecutionPlan p)

Description copied from class: SourceImpl

Re-apply a previously prepared plan. This will also 're-wire' the selectors with the join constraints

Specified by:

prepare in class SourceImpl

Parameters:

p - the plan to use

prepare

public ExecutionPlan prepare()

Description copied from class: SourceImpl

Prepare executing the query (recursively). This will 'wire' the selectors with the join constraints, and decide which index to use.

Specified by:

prepare in class SourceImpl

Returns:

the execution plan

getExecutionPlan

public SelectorExecutionPlan getExecutionPlan()

setQueryConstraint

public void setQueryConstraint(ConstraintImpl queryConstraint)

Description copied from class: SourceImpl

Set the complete constraint of the query (the WHERE ... condition).

Specified by:

setQueryConstraint in class SourceImpl

Parameters:

queryConstraint - the constraint

setOuterJoin

public void setOuterJoin(boolean outerJoinLeftHandSide,
                         boolean outerJoinRightHandSide)

Description copied from class: SourceImpl

Set whether this source is the left hand side or right hand side of a left outer join.

Specified by:

setOuterJoin in class SourceImpl

Parameters:

outerJoinLeftHandSide - true if yes

outerJoinRightHandSide - true if yes

addJoinCondition

public void addJoinCondition(JoinConditionImpl joinCondition,
                             boolean forThisSelector)

Description copied from class: SourceImpl

Add the join condition (the ON ... condition).

Specified by:

addJoinCondition in class SourceImpl

Parameters:

joinCondition - the join condition

forThisSelector - if set, the join condition can only be evaluated when all previous selectors are executed.

execute

public void execute(NodeState rootState)

Description copied from class: SourceImpl

Execute the query. The current node is set to before the first row.

Specified by:

execute in class SourceImpl

Parameters:

rootState - root state of the given revision

getPlan

public String getPlan(NodeState rootState)

Description copied from class: SourceImpl

Get the query plan.

Specified by:

getPlan in class SourceImpl

Parameters:

rootState - the root

Returns:

the query plan

getIndexCostInfo

public String getIndexCostInfo(NodeState rootState)

Description copied from class: SourceImpl

Get the index cost as a JSON string.

Specified by:

getIndexCostInfo in class SourceImpl

Parameters:

rootState - the root

Returns:

the cost

createFilter

public FilterImpl createFilter(boolean preparing)

Create the filter condition for planning or execution.

Specified by:

createFilter in class SourceImpl

Parameters:

preparing - whether a filter for the prepare phase should be made

Returns:

the filter

next

public boolean next()

Description copied from class: SourceImpl

Go to the next node for the given source. This will also filter the result for the right node type if required.

Specified by:

next in class SourceImpl

Returns:

true if there is a next row

currentPath

public String currentPath()

Get the current absolute Oak path (normalized).

Returns:

the path

currentTree

@Nullable
public @Nullable Tree currentTree()

Get the tree at the current path.

Returns:

the current tree, or null

currentProperty

public PropertyValue currentProperty(String propertyName)

The value for the given selector for the current node.

Parameters:

propertyName - the JCR (not normalized) property name

Returns:

the property value

currentProperty

public PropertyValue currentProperty(String propertyName,
                                     int propertyType)

The value for the given selector for the current node, filtered by property type.

Parameters:

propertyName - the JCR (not normalized) property name

propertyType - only include properties of this type

Returns:

the property value (possibly null)

currentOakProperty

public PropertyValue currentOakProperty(String oakPropertyName)

Get the property value. The property name may be relative. The special property names "jcr:path", "jcr:score" and "rep:excerpt" are supported.

Parameters:

oakPropertyName - (must already be normalized)

Returns:

the property value or null if not found

isVirtualRow

public boolean isVirtualRow()

getSelector

public SelectorImpl getSelector(String selectorName)

Description copied from class: SourceImpl

Get the selector with the given name, or null if not found.

Specified by:

getSelector in class SourceImpl

Parameters:

selectorName - the selector name

Returns:

the selector, or null

getScanCount

public long getScanCount()

restrictSelector

public void restrictSelector(ConstraintImpl constraint)

getSelectorConstraints

public List<ConstraintImpl> getSelectorConstraints()

equals

public boolean equals(Object other)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

getInnerJoinSelectors

public ArrayList<SourceImpl> getInnerJoinSelectors()

Description copied from class: SourceImpl

Get all sources that are joined via inner join. (These can be swapped.)

Specified by:

getInnerJoinSelectors in class SourceImpl

Returns:

the list of selectors (sorted from left to right)

isOuterJoinRightHandSide

public boolean isOuterJoinRightHandSide()

Description copied from class: SourceImpl

Whether any selector is the outer-join right hand side.

Specified by:

isOuterJoinRightHandSide in class SourceImpl

Returns:

true if there is any

getQuery

public QueryImpl getQuery()

getSize

public long getSize(NodeState rootState,
                    Result.SizePrecision precision,
                    long max)

Description copied from class: SourceImpl

Get the size if known.

Specified by:

getSize in class SourceImpl

Parameters:

rootState - the root node state (to initialize the cursor, if needed)

precision - the required precision

max - the maximum nodes read (for an exact size)

Returns:

the size, or -1 if unknown

copyOf

public SourceImpl copyOf()

Returns:

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

protect

protected String protect(Object expression)

quote

protected String quote(String pathOrName)

quoteJson

protected 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