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java.lang.Objectorg.eclipse.persistence.jpa.jpql.parser.AbstractExpression
org.eclipse.persistence.jpa.jpql.parser.AbstractEncapsulatedExpression
org.eclipse.persistence.jpa.jpql.parser.AbstractDoubleEncapsulatedExpression
public abstract class AbstractDoubleEncapsulatedExpression
This Expression takes care of parsing an expression that encapsulates two expressions
separated by a comma.
expression ::= <identifier>(first_expression, second_expression)
ConcatExpression,
ModExpression,
NullIfExpression| Field Summary |
|---|
| Fields inherited from class org.eclipse.persistence.jpa.jpql.parser.AbstractExpression |
|---|
COMMA, DOT, DOUBLE_QUOTE, LEFT_CURLY_BRACKET, LEFT_PARENTHESIS, NOT_DEFINED, RIGHT_CURLY_BRACKET, RIGHT_PARENTHESIS, SINGLE_QUOTE, SPACE, UNDERSCORE |
| Constructor Summary | |
|---|---|
protected |
AbstractDoubleEncapsulatedExpression(AbstractExpression parent)
Creates a new AbstractDoubleEncapsulatedExpression. |
| Method Summary | |
|---|---|
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 |
addOrderedEncapsulatedExpressionTo(java.util.List<Expression> children)
Adds the Expressions representing the encapsulated Expression. |
CollectionExpression |
buildCollectionExpression()
Creates a new CollectionExpression that will wrap the first and second expressions. |
Expression |
getFirstExpression()
Returns the Expression that represents the first expression. |
Expression |
getSecondExpression()
Returns the Expression that represents the second expression. |
boolean |
hasComma()
Determines whether the comma was parsed after the first expression. |
boolean |
hasEncapsulatedExpression()
Determines whether something was parsed after the left parenthesis. |
boolean |
hasFirstExpression()
Determines whether the first expression of the query was parsed. |
boolean |
hasSecondExpression()
Determines whether the second expression of the query was parsed. |
boolean |
hasSpaceAfterComma()
Determines whether a whitespace was parsed after the comma. |
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 boolean |
isSecondExpressionOptional()
Determines whether the second expression is optional or not. |
abstract java.lang.String |
parameterExpressionBNF(int index)
Returns the BNF to be used to parse one of the encapsulated expression. |
protected void |
parseEncapsulatedExpression(WordParser wordParser,
int whitespaceCount,
boolean tolerant)
Parses the encapsulated expression by starting at the current position, which is part of the given WordParser. |
protected void |
removeEncapsulatedExpression()
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protected void |
toParsedTextEncapsulatedExpression(java.lang.StringBuilder writer,
boolean actual)
Generates a string representation of the encapsulated Expression. |
| Methods inherited from class org.eclipse.persistence.jpa.jpql.parser.AbstractEncapsulatedExpression |
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addOrderedChildrenTo, areLogicalIdentifiersSupported, getActualIdentifier, getIdentifier, hasLeftParenthesis, hasRightParenthesis, hasSpaceAfterIdentifier, parse, parseIdentifier, shouldParseRightParenthesis, toParsedText |
| Methods inherited from class java.lang.Object |
|---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
| Methods inherited from interface org.eclipse.persistence.jpa.jpql.parser.Expression |
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accept, getQueryBNF |
| Constructor Detail |
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protected AbstractDoubleEncapsulatedExpression(AbstractExpression parent)
AbstractDoubleEncapsulatedExpression.
parent - The parent of this expression| Method Detail |
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public 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 AbstractExpressionchildren - The collection used to store the childrenprotected void addOrderedEncapsulatedExpressionTo(java.util.List<Expression> children)
Expressions representing the encapsulated Expression.
addOrderedEncapsulatedExpressionTo in class AbstractEncapsulatedExpressionchildren - The list used to store the string representation of the encapsulated Expressionpublic final CollectionExpression buildCollectionExpression()
CollectionExpression that will wrap the first and second expressions.
public final Expression getFirstExpression()
Expression that represents the first expression.
public final Expression getSecondExpression()
Expression that represents the second expression.
public final boolean hasComma()
true if a comma was parsed after the first expression; false
otherwisepublic boolean hasEncapsulatedExpression()
hasEncapsulatedExpression in class AbstractEncapsulatedExpressiontrue if something was parsed; false otherwisepublic final boolean hasFirstExpression()
true if the first expression was parsed; false if it was
not parsedpublic final boolean hasSecondExpression()
true if the second expression was parsed; false if it was
not parsedpublic final boolean hasSpaceAfterComma()
true if there was a whitespace after the comma; false
otherwiseprotected boolean isParsingComplete(WordParser wordParser, java.lang.String word, Expression expression)
isParsingComplete in class AbstractEncapsulatedExpressionwordParser - 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 boolean isSecondExpressionOptional()
true if the second expression is optional; false if it is
requiredpublic abstract java.lang.String parameterExpressionBNF(int index)
index - The position of the encapsulated Expression that needs to be parsed
within the parenthesis, which starts at position 0
protected void parseEncapsulatedExpression(WordParser wordParser, int whitespaceCount, boolean tolerant)
WordParser.
parseEncapsulatedExpression in class AbstractEncapsulatedExpressionwordParser - The text to parse based on the current position of the cursorwhitespaceCount - The number of whitespace characters that were parsed after '('tolerant - Determines whether the parsing system should be tolerant, meaning if it should
try to parse invalid or incomplete queriesprotected void removeEncapsulatedExpression()
removeEncapsulatedExpression in class AbstractEncapsulatedExpression
protected void toParsedTextEncapsulatedExpression(java.lang.StringBuilder writer,
boolean actual)
Expression.
toParsedTextEncapsulatedExpression in class AbstractEncapsulatedExpressionwriter - The buffer used to append the encapsulated Expression's string
representationactual - 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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