Class ConcatExpressionStateObject
- 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.AbstractListHolderStateObject<StateObject>
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- org.eclipse.persistence.jpa.jpql.tools.model.query.ConcatExpressionStateObject
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- All Implemented Interfaces:
ListHolderStateObject<StateObject>,StateObject
public class ConcatExpressionStateObject extends AbstractListHolderStateObject<StateObject>
TheCONCATfunction returns a string that is a concatenation of its arguments.JPA 1.0:
BNF:JPA 2.0expression ::= CONCAT(string_primary, string_primary)BNF:expression ::= CONCAT(string_primary, string_primary {, string_primary}*)- Version:
- 2.4
- See Also:
ConcatExpression- Author:
- Pascal Filion
- Since:
- 2.4
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Field Summary
Fields Modifier and Type Field Description static java.lang.StringSTRING_PRIMARY_STATE_OBJECT_LISTNotifies the content of the list ofStateObjectrepresenting the string primaries has changed.
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Constructor Summary
Constructors Constructor Description ConcatExpressionStateObject(StateObject parent)Creates a newConcatExpressionStateObject.ConcatExpressionStateObject(StateObject parent, java.util.List<? extends StateObject> stateObjects)Creates a newConcatExpressionStateObject.ConcatExpressionStateObject(StateObject parent, StateObject... stateObjects)Creates a newConcatExpressionStateObject.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description voidaccept(StateObjectVisitor visitor)Visits thisStateObjectby the givenvisitor.ConcatExpressiongetExpression()Returns the actual parsed object if thisStateObjectrepresentation of the JPQL query was created by parsing an existing JPQL query.booleanisEquivalent(StateObject stateObject)Determines whether the givenStateObjectis equivalent to this one, i.e. the information of bothStateObjectis the same.protected java.lang.StringlistName()Returns the name that is uniquely identifying the list.voidsetExpression(ConcatExpression expression)Keeps a reference of theparsed objectobject, which should only be done when this object is instantiated during the conversion of a parsed JPQL query intoStateObjects.protected voidtoTextInternal(java.lang.Appendable writer)Prints out a string representation of thisStateObject, which should not be used to define atruestring representation of a JPQL query but should be used for debugging purposes.-
Methods inherited from class org.eclipse.persistence.jpa.jpql.tools.model.query.AbstractListHolderStateObject
addChildren, addItem, addItems, addListChangeListener, areChildrenEquivalent, canMoveDown, canMoveUp, getItem, hasItems, initialize, items, itemsSize, moveDown, moveUp, removeItem, removeItems, removeListChangeListener, toStringItems
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Methods inherited from class org.eclipse.persistence.jpa.jpql.tools.model.query.AbstractStateObject
acceptUnknownVisitor, acceptUnknownVisitor, addProblems, addPropertyChangeListener, areEquivalent, buildProblem, buildProblem, buildStateObject, buildStateObjects, checkParent, children, decorate, equals, findIdentificationVariable, firePropertyChanged, getChangeSupport, getDeclaration, getDecorator, getGrammar, getManagedTypeProvider, getParent, getQueryBuilder, getRoot, getType, getType, getTypeHelper, getTypeRepository, hashCode, isDecorated, parent, parent, parent, removePropertyChangeListener, setExpression, setParent, toString, toString, toStringInternal, toStringItems, toText
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Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait
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Methods inherited from interface org.eclipse.persistence.jpa.jpql.tools.model.query.StateObject
addPropertyChangeListener, children, decorate, findIdentificationVariable, getDeclaration, getDecorator, getGrammar, getManagedTypeProvider, getParent, getQueryBuilder, getRoot, isDecorated, removePropertyChangeListener, setParent, toString, toText
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Field Detail
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STRING_PRIMARY_STATE_OBJECT_LIST
public static final java.lang.String STRING_PRIMARY_STATE_OBJECT_LIST
Notifies the content of the list ofStateObjectrepresenting the string primaries has changed.- See Also:
- Constant Field Values
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Constructor Detail
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ConcatExpressionStateObject
public ConcatExpressionStateObject(StateObject parent)
Creates a newConcatExpressionStateObject.- Parameters:
parent- The parent of this state object, which cannot benull- Throws:
java.lang.NullPointerException- The given parent cannot benull
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ConcatExpressionStateObject
public ConcatExpressionStateObject(StateObject parent, java.util.List<? extends StateObject> stateObjects)
Creates a newConcatExpressionStateObject.- Parameters:
stateObjects- The list ofStateObjectrepresenting the encapsulated expressions
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ConcatExpressionStateObject
public ConcatExpressionStateObject(StateObject parent, StateObject... stateObjects)
Creates a newConcatExpressionStateObject.- Parameters:
parent- The parent of this state object, which cannot benullstateObjects- The list ofStateObjectrepresenting the encapsulated expressions- Throws:
java.lang.NullPointerException- The given parent cannot benull
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Method Detail
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accept
public void accept(StateObjectVisitor visitor)
Visits thisStateObjectby the givenvisitor.- Parameters:
visitor- Thevisitorto visit this object
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getExpression
public ConcatExpression getExpression()
Returns the actual parsed object if thisStateObjectrepresentation of the JPQL query was created by parsing an existing JPQL query.- Specified by:
getExpressionin interfaceStateObject- Overrides:
getExpressionin classAbstractStateObject- Returns:
- The parsed object when a JPQL query is parsed and converted into a
StateObjectornullwhen the JPQL query is manually created (i.e. not from a string)
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isEquivalent
public boolean isEquivalent(StateObject stateObject)
Determines whether the givenStateObjectis equivalent to this one, i.e. the information of bothStateObjectis the same.- Specified by:
isEquivalentin interfaceStateObject- Overrides:
isEquivalentin classAbstractStateObject- Parameters:
stateObject- TheStateObjectto compare its content to this one- Returns:
trueif both object are equivalent;falseotherwise
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listName
protected java.lang.String listName()
Returns the name that is uniquely identifying the list.- Specified by:
listNamein classAbstractListHolderStateObject<StateObject>- Returns:
- The unique name identifying the list
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setExpression
public void setExpression(ConcatExpression expression)
Keeps a reference of theparsed objectobject, which should only be done when this object is instantiated during the conversion of a parsed JPQL query intoStateObjects.- Parameters:
expression- Theparsed objectrepresenting aCONCATexpression
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toTextInternal
protected void toTextInternal(java.lang.Appendable writer) throws java.io.IOExceptionPrints out a string representation of thisStateObject, which should not be used to define atruestring representation of a JPQL query but should be used for debugging purposes.- Specified by:
toTextInternalin classAbstractStateObject- Parameters:
writer- The writer used to print out the string representation- Throws:
java.io.IOException- This should never happens, it is only required becauseAppendableis used instead of any concrete class
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