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Oracle Fusion Middleware Java API Reference for Oracle TopLink 11g Release 1 (11.1.1) E28847-01 |
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java.lang.Object
org.eclipse.persistence.jpa.internal.jpql.parser.StringExpression
org.eclipse.persistence.jpa.internal.jpql.parser.AbstractExpression
org.eclipse.persistence.jpa.internal.jpql.parser.UpdateItem
public final class UpdateItem
The new_value
specified for an update operation must be compatible in type with the field to which it is assigned.
update_item ::= [identification_variable.]{state_field | single_valued_association_field} = new_value
UpdateClause
Field Summary | |
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private boolean |
hasEqualSign Determines whether the equal sign was parsed or not. |
private boolean |
hasSpaceAfterEqualSign Determines whether a whitespace was parsed after the equal sign or not. |
private boolean |
hasSpaceAfterStateFieldPathExpression Determines whether a whitespace was parsed before the equal sign or not |
private AbstractExpression |
newValue The expression representing the new value. |
private AbstractExpression |
stateFieldExpression The expression representing the state field to have its value updated. |
Fields inherited from class org.eclipse.persistence.jpa.internal.jpql.parser.AbstractExpression |
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COMMA, DOT, DOUBLE_QUOTE, LEFT_CURLY_BRACKET, LEFT_PARENTHESIS, NOT_DEFINED, RIGHT_CURLY_BRACKET, RIGHT_PARENTHESIS, SINGLE_QUOTE, SPACE, UNDERSCORE |
Constructor Summary | |
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UpdateItem(AbstractExpression parent) Creates a new UpdateItem . |
Method Summary | |
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void |
accept(ExpressionVisitor visitor) Visits this Expression by the given visitor . |
void |
acceptChildren(ExpressionVisitor visitor) Visits the children of this Expression . |
(package private) void |
addChildrenTo(java.util.Collection<Expression> children) Adds the children of this Expression to the given collection. |
(package private) void |
addOrderedChildrenTo(java.util.List<StringExpression> children) Adds the StringExpressions representing this Expression . |
Expression |
getNewValue() Returns the Expression representing the new value, which is the new value of the property. |
JPQLQueryBNF |
getQueryBNF() Returns the BNF of this Expression . |
Expression |
getStateFieldPathExpression() Returns the Expression representing the state field path expression, which is the property that should get updated. |
boolean |
hasEqualSign() Determines whether the equal sign was parsed or not. |
boolean |
hasNewValue() Determines whether the new value section of the query was parsed. |
boolean |
hasSpaceAfterEqualSign() Determines whether a whitespace was parsed after the equal sign or not. |
boolean |
hasSpaceAfterStateFieldPathExpression() Determines whether a whitespace was parsed after the state field path expression not. |
boolean |
hasStateFieldPathExpression() Determines whether the state field was parsed. |
(package private) void |
parse(WordParser wordParser, boolean tolerant) Parses the query by starting at the current position, which is part of the given WordParser . |
(package private) void |
toParsedText(java.lang.StringBuilder writer, boolean includeVirtual) Generates a string representation of this Expression . |
Methods inherited from class org.eclipse.persistence.jpa.internal.jpql.parser.AbstractExpression |
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buildExpressionFromFallingBack, buildNullExpression, buildStringExpression, buildStringExpression, buildUnknownExpression, children, expressionFactory, expressionFactoryForIdentifier, findQueryBNF, getChildren, getJPAVersion, getParent, getRoot, getText, handleAggregate, identifierRole, identifiers, identifiers, identifierVersion, isAncestor, isIdentifier, isNull, isParsingComplete, isTolerant, isUnknown, isVirtual, orderedChildren, parse, parseSingleExpression, populatePosition, queryBNF, readdLeadingSpaces, rebuildActualText, rebuildParsedText, setParent, setText, shouldParseWithFactoryFirst, shouldSkipLiteral, toActualText, toParsedText, toString |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Field Detail |
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private boolean hasEqualSign
private boolean hasSpaceAfterEqualSign
private boolean hasSpaceAfterStateFieldPathExpression
private AbstractExpression newValue
private AbstractExpression stateFieldExpression
Constructor Detail |
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UpdateItem(AbstractExpression parent)
UpdateItem
.
parent
- The parent of this expressionMethod Detail |
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public void accept(ExpressionVisitor visitor)
Expression
by the given visitor
.visitor
- The visitor
to visit this objectpublic void acceptChildren(ExpressionVisitor visitor)
Expression
. This method can be used to optimize traversing the children since a new list is not created every time Expression.children()
or Expression.getChildren()
is called.
This does not traverse the Expression
sub-hierarchy, use an subclass of AbstractTraverseChildrenVisitor
in order to traverse the entire sub-hierarchy.
visitor
- The visitor
to visit the children of this object.void addChildrenTo(java.util.Collection<Expression> children)
Expression
to the given collection.addChildrenTo
in class AbstractExpression
children
- The collection used to store the childrenvoid addOrderedChildrenTo(java.util.List<StringExpression> children)
StringExpressions
representing this Expression
.addOrderedChildrenTo
in class AbstractExpression
children
- The list used to store the string representation of this Expression
public Expression getNewValue()
Expression
representing the new value, which is the new value of the property.public JPQLQueryBNF getQueryBNF()
Expression
.getQueryBNF
in class AbstractExpression
JPQLQueryBNF
, which represents the grammar of this Expression
public Expression getStateFieldPathExpression()
Expression
representing the state field path expression, which is the property that should get updated.public boolean hasEqualSign()
true
if the equal sign was parsed; false
otherwisepublic boolean hasNewValue()
true
the new value was parsed; false
if nothing was parsedpublic boolean hasSpaceAfterEqualSign()
true
if there was a whitespace after the equal sign; false
otherwisepublic boolean hasSpaceAfterStateFieldPathExpression()
true
if there was a whitespace after the state field path expression; false
otherwisepublic boolean hasStateFieldPathExpression()
true
the state field was parsed; false
otherwisevoid parse(WordParser wordParser, boolean tolerant)
WordParser
.parse
in class AbstractExpression
wordParser
- The text to parse based on the current position of the cursortolerant
- Determines whether the parsing system should be tolerant, meaning if it should try to parse invalid or incomplete queriesvoid toParsedText(java.lang.StringBuilder writer, boolean includeVirtual)
Expression
.toParsedText
in class AbstractExpression
writer
- The buffer used to append this Expression
's string representationincludeVirtual
- Determines whether to include any characters that are considered virtual, i.e. that was parsed when the query is incomplete and is needed for functionality like content assist
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