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

Class FirstImpl

java.lang.Object

org.apache.jackrabbit.oak.query.ast.DynamicOperandImpl

org.apache.jackrabbit.oak.query.ast.FirstImpl

public class FirstImpl
extends DynamicOperandImpl

The function "first(..)".

Field Summary

Fields

Modifier and Type	Field	Description
protected QueryImpl	query

Constructor Summary

Constructors

Constructor	Description
FirstImpl(DynamicOperandImpl operand)

Method Summary

Modifier and Type	Method	Description
boolean	canRestrictSelector(SelectorImpl s)	Check whether the condition can be applied to a selector (to restrict the selector).
protected PropertyValue	convertValueToType(PropertyValue v, PropertyValue targetType)
@NotNull org.apache.jackrabbit.oak.query.ast.AstElement	copyOf()
DynamicOperandImpl	createCopy()
PropertyValue	currentProperty()
String	getFunction(SelectorImpl s)	Get the function of a function-based index, in Polish notation.
protected String	getLocalPath(String path)	Calculate the session local path (the path excluding the workspace name) if possible.
DynamicOperandImpl	getOperand()
QueryIndex.OrderEntry	getOrderEntry(SelectorImpl s, OrderingImpl o)	Create an entry for the "order by" list for a given filter.
PropertyExistenceImpl	getPropertyExistence()	Get the property existence condition for this operand, if this operand is used as part of a condition.
Set<SelectorImpl>	getSelectors()	Get the set of selectors for this operand.
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, Operator operator, PropertyValue v)	Apply a restriction of type "this = value" to the given filter.
void	restrictList(FilterImpl f, List<PropertyValue> list)	Apply a restriction of type "this in (list)" to the given filter.
void	setQuery(QueryImpl query)
String	toString()

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

equals, getOrderEntryPropertyName, hashCode, supportsRangeConditions

Methods inherited from class java.lang.Object

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

Field Detail

query

protected QueryImpl query

Constructor Detail

FirstImpl

public FirstImpl(DynamicOperandImpl operand)

Method Detail

getOperand

public DynamicOperandImpl getOperand()

toString

public String toString()

Overrides:

toString in class Object

getPropertyExistence

public PropertyExistenceImpl getPropertyExistence()

Description copied from class: DynamicOperandImpl

Get the property existence condition for this operand, if this operand is used as part of a condition.

Specified by:

getPropertyExistence in class DynamicOperandImpl

Returns:

the property existence condition, or null if none

getSelectors

public Set<SelectorImpl> getSelectors()

Description copied from class: DynamicOperandImpl

Get the set of selectors for this operand.

Specified by:

getSelectors in class DynamicOperandImpl

Returns:

the set of selectors

currentProperty

public PropertyValue currentProperty()

Specified by:

currentProperty in class DynamicOperandImpl

restrict

public void restrict(FilterImpl f,
                     Operator operator,
                     PropertyValue v)

Description copied from class: DynamicOperandImpl

Apply a restriction of type "this = value" to the given filter.

Specified by:

restrict in class DynamicOperandImpl

Parameters:

f - the filter where the restriction is applied.

operator - the operator (for example "=").

v - the value

restrictList

public void restrictList(FilterImpl f,
                         List<PropertyValue> list)

Description copied from class: DynamicOperandImpl

Apply a restriction of type "this in (list)" to the given filter.

Specified by:

restrictList in class DynamicOperandImpl

Parameters:

f - the filter where the restriction is applied.

list - the list of values

getFunction

public String getFunction(SelectorImpl s)

Description copied from class: DynamicOperandImpl

Get the function of a function-based index, in Polish notation.

Specified by:

getFunction in class DynamicOperandImpl

Parameters:

s - the selector

Returns:

the function, or null if not supported

canRestrictSelector

public boolean canRestrictSelector(SelectorImpl s)

Description copied from class: DynamicOperandImpl

Check whether the condition can be applied to a selector (to restrict the selector). The method may return true if the operand can be evaluated when the given selector and all previous selectors in the join can be evaluated.

Specified by:

canRestrictSelector in class DynamicOperandImpl

Parameters:

s - the selector

Returns:

true if the condition can be applied

createCopy

public DynamicOperandImpl createCopy()

Specified by:

createCopy in class DynamicOperandImpl

getOrderEntry

public QueryIndex.OrderEntry getOrderEntry(SelectorImpl s,
                                           OrderingImpl o)

Description copied from class: DynamicOperandImpl

Create an entry for the "order by" list for a given filter.

Specified by:

getOrderEntry in class DynamicOperandImpl

Parameters:

s - the selector

o - the ordering

Returns:

the entry

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

copyOf

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

Returns:

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