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java.lang.Objectorg.eclipse.persistence.jpa.jpql.parser.AbstractExpression
org.eclipse.persistence.jpa.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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Fields inherited from class org.eclipse.persistence.jpa.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 . |
protected void |
addChildrenTo(java.util.Collection<Expression> children)
Adds the children of this AbstractExpression to the given collection. |
protected void |
addOrderedChildrenTo(java.util.List<Expression> children)
Adds the children of this AbstractExpression to the given list. |
JPQLQueryBNF |
findQueryBNF(Expression expression)
Retrieves the JPQLQueryBNF that represents the fragment of this Expression
that was used when parsing the given 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. |
protected boolean |
isParsingComplete(WordParser wordParser,
java.lang.String word,
Expression expression)
Determines whether the parsing is complete based on what is left in the given text. |
protected void |
parse(WordParser wordParser,
boolean tolerant)
Parses the query by starting at the current position, which is part of the given WordParser . |
protected void |
toParsedText(java.lang.StringBuilder writer,
boolean actual)
Generates a string representation of this Expression , including its children,
if it has any. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Constructor Detail |
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public 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 ExpressionVisitor
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()
is called.
This does not traverse the Expression
sub-hierarchy, use a subclass of
AbstractTraverseChildrenVisitor
in order to traverse the entire sub-hierarchy.
visitor
- The visitor
to visit the children of this object.protected void addChildrenTo(java.util.Collection<Expression> children)
AbstractExpression
to the given collection.
addChildrenTo
in class AbstractExpression
children
- The collection used to store the childrenprotected void addOrderedChildrenTo(java.util.List<Expression> children)
AbstractExpression
to the given list.
addOrderedChildrenTo
in class AbstractExpression
children
- The list used to store the string representation of this AbstractExpression
public JPQLQueryBNF findQueryBNF(Expression expression)
JPQLQueryBNF
that represents the fragment of this Expression
that was used when parsing the given Expression
.
findQueryBNF
in interface Expression
findQueryBNF
in class AbstractExpression
expression
- The Expression
that is a descendant of this one
JPQLQueryBNF
that was used to parse the given expressionpublic Expression getNewValue()
Expression
representing the new value, which is the new value of the property.
public JPQLQueryBNF getQueryBNF()
Expression
.
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
otherwiseprotected boolean isParsingComplete(WordParser wordParser, java.lang.String word, Expression expression)
isParsingComplete
in class AbstractExpression
wordParser
- The text to parse based on the current position of the cursorword
- The word that was retrieved from the given text, which is the first word in the textexpression
- The Expression
that has already been parsed
true
if the text no longer can't be parsed by the current expression;
false
if more can be parsedprotected void 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 queriesprotected void toParsedText(java.lang.StringBuilder writer, boolean actual)
Expression
, including its children,
if it has any.
toParsedText
in class AbstractExpression
writer
- The buffer used to append this Expression
's string representationactual
- Determines whether the string representation should represent what was parsed,
i.e. include any "virtual" whitespace (such as ending whitespace) and the actual case of the
JPQL identifiers
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