Class LengthExpressionStateObject
- java.lang.Object
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- org.eclipse.persistence.jpa.jpql.tools.model.query.AbstractStateObject
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- org.eclipse.persistence.jpa.jpql.tools.model.query.AbstractEncapsulatedExpressionStateObject
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- org.eclipse.persistence.jpa.jpql.tools.model.query.AbstractSingleEncapsulatedExpressionStateObject
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- org.eclipse.persistence.jpa.jpql.tools.model.query.LengthExpressionStateObject
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- All Implemented Interfaces:
StateObject
public class LengthExpressionStateObject extends AbstractSingleEncapsulatedExpressionStateObject
TheLENGTH
function returns the length of the string in characters as an integer.BNF:expression ::= LENGTH(string_primary)
- Since:
- 2.4
- Version:
- 2.4
- Author:
- Pascal Filion
- See Also:
LengthExpression
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Field Summary
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Fields inherited from class org.eclipse.persistence.jpa.jpql.tools.model.query.AbstractSingleEncapsulatedExpressionStateObject
STATE_OBJECT_PROPERTY
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Constructor Summary
Constructors Constructor Description LengthExpressionStateObject(StateObject parent)
Creates a newLengthExpressionStateObject
.LengthExpressionStateObject(StateObject parent, String jpqlFragment)
Creates a newLengthExpressionStateObject
.LengthExpressionStateObject(StateObject parent, StateObject stateObject)
Creates a newLengthExpressionStateObject
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
accept(StateObjectVisitor visitor)
Visits thisStateObject
by the givenvisitor
.LengthExpression
getExpression()
Returns the actual parsed object if thisStateObject
representation of the JPQL query was created by parsing an existing JPQL query.String
getIdentifier()
Returns the JPQL identifier of the expression represented by thisAbstractSingleEncapsulatedExpressionStateObject
.void
setExpression(LengthExpression expression)
Keeps a reference of theparsed object
object, which should only be done when this object is instantiated during the conversion of a parsed JPQL query intoStateObjects
.void
setStateObject(StateObject stateObject)
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Methods inherited from class org.eclipse.persistence.jpa.jpql.tools.model.query.AbstractSingleEncapsulatedExpressionStateObject
getStateObject, hasStateObject, isEquivalent, parse
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Methods inherited from class org.eclipse.persistence.jpa.jpql.tools.model.query.AbstractStateObject
addPropertyChangeListener, children, decorate, equals, findIdentificationVariable, getDeclaration, getDecorator, getGrammar, getManagedTypeProvider, getParent, getQueryBuilder, getRoot, getType, getType, getTypeHelper, getTypeRepository, hashCode, isDecorated, removePropertyChangeListener, setExpression, setParent, toString, toString, toText
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Constructor Detail
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LengthExpressionStateObject
public LengthExpressionStateObject(StateObject parent)
Creates a newLengthExpressionStateObject
.- Parameters:
parent
- The parent of this state object, which cannot benull
- Throws:
NullPointerException
- The given parent cannot benull
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LengthExpressionStateObject
public LengthExpressionStateObject(StateObject parent, StateObject stateObject)
Creates a newLengthExpressionStateObject
.- Parameters:
parent
- The parent of this state object, which cannot benull
stateObject
- TheStateObject
representing the encapsulated expression- Throws:
NullPointerException
- The given parent cannot benull
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LengthExpressionStateObject
public LengthExpressionStateObject(StateObject parent, String jpqlFragment)
Creates a newLengthExpressionStateObject
.- Parameters:
parent
- The parent of this state object, which cannot benull
jpqlFragment
- The portion of the query representing the encapsulated expression- Throws:
NullPointerException
- The given parent cannot benull
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Method Detail
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accept
public void accept(StateObjectVisitor visitor)
Visits thisStateObject
by the givenvisitor
.- Parameters:
visitor
- Thevisitor
to visit this object
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getExpression
public LengthExpression getExpression()
Returns the actual parsed object if thisStateObject
representation of the JPQL query was created by parsing an existing JPQL query.- Specified by:
getExpression
in interfaceStateObject
- Overrides:
getExpression
in classAbstractSingleEncapsulatedExpressionStateObject
- Returns:
- The parsed object when a JPQL query is parsed and converted into a
StateObject
ornull
when the JPQL query is manually created (i.e. not from a string)
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getIdentifier
public String getIdentifier()
Returns the JPQL identifier of the expression represented by thisAbstractSingleEncapsulatedExpressionStateObject
.- Specified by:
getIdentifier
in classAbstractEncapsulatedExpressionStateObject
- Returns:
- The JPQL identifier that is shown before the left parenthesis
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setExpression
public void setExpression(LengthExpression expression)
Keeps a reference of theparsed object
object, which should only be done when this object is instantiated during the conversion of a parsed JPQL query intoStateObjects
.- Parameters:
expression
- Theparsed object
representing aLENGTH
expression
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setStateObject
public void setStateObject(StateObject stateObject)
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