org.eclipse.persistence.jpa.jpql.parser
Class InExpression

java.lang.Object
  org.eclipse.persistence.jpa.jpql.parser.AbstractExpression
      org.eclipse.persistence.jpa.jpql.parser.InExpression

All Implemented Interfaces:

Expression

public final class InExpression
extends AbstractExpression

The state field path expression must have a string, numeric, or enum value. The literal and/or input parameter values must be like the same abstract schema type of the state field path expression in type.

The results of the subquery must be like the same abstract schema type of the state field path expression in type.

There must be at least one element in the comma separated list that defines the set of values for the IN expression. If the value of a state field path expression in an IN or NOT IN expression is NULL or unknown, the value of the expression is unknown.

JPA 1.0:

BNF: in_expression ::= state_field_path_expression [NOT] IN(in_item {, in_item}* | subquery)

JPA 2.0

BNF: in_expression ::= {state_field_path_expression | type_discriminator} [NOT] IN { ( in_item {, in_item}* ) | (subquery) | collection_valued_input_parameter }

Example: SELECT c FROM Customer c WHERE c.home.city IN :city

Example: SELECT p FROM Project p WHERE TYPE(p) IN(LargeProject, SmallProject)

Version:

2.4.2

Author:

Pascal Filion

Since:

2.3

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

Fields inherited from interface org.eclipse.persistence.jpa.jpql.parser.Expression

ABS, ALL, AND, ANY, AS, ASC, AVG, BETWEEN, BIT_LENGTH, BOTH, CASE, CAST, CHAR_LENGTH, CHARACTER_LENGTH, CLASS, COALESCE, COLUMN, CONCAT, COUNT, CURRENT_DATE, CURRENT_TIME, CURRENT_TIMESTAMP, DELETE, DELETE_FROM, DESC, DIFFERENT, DISTINCT, DIVISION, ELSE, EMPTY, END, ENTRY, EQUAL, ESCAPE, EXCEPT, EXISTS, EXTRACT, FALSE, FETCH, FROM, FUNC, FUNCTION, GREATER_THAN, GREATER_THAN_OR_EQUAL, GROUP_BY, HAVING, IN, INDEX, INNER, INNER_JOIN, INNER_JOIN_FETCH, INTERSECT, IS, IS_EMPTY, IS_NOT_EMPTY, IS_NOT_NULL, IS_NULL, JOIN, JOIN_FETCH, KEY, LEADING, LEFT, LEFT_JOIN, LEFT_JOIN_FETCH, LEFT_OUTER_JOIN, LEFT_OUTER_JOIN_FETCH, LENGTH, LIKE, LOCATE, LOWER, LOWER_THAN, LOWER_THAN_OR_EQUAL, MAX, MEMBER, MEMBER_OF, MIN, MINUS, MOD, MULTIPLICATION, NAMED_PARAMETER, NEW, NOT, NOT_BETWEEN, NOT_EQUAL, NOT_EXISTS, NOT_IN, NOT_LIKE, NOT_MEMBER, NOT_MEMBER_OF, NULL, NULLIF, NULLS_FIRST, NULLS_LAST, OBJECT, OF, ON, OPERATOR, OR, ORDER_BY, OUTER, PLUS, POSITION, POSITIONAL_PARAMETER, QUOTE, REGEXP, SELECT, SET, SIZE, SOME, SQL, SQRT, SUBSTRING, SUM, TABLE, THEN, TRAILING, TREAT, TRIM, TRUE, TYPE, UNION, UNKNOWN, UPDATE, UPPER, VALUE, WHEN, WHERE

Constructor Summary

InExpression(AbstractExpression parent, AbstractExpression expression)
Creates a new InExpression.

Method Summary

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.
java.lang.String	getActualInIdentifier() Returns the actual IN found in the string representation of the JPQL query, which has the actual case that was used.
java.lang.String	getActualNotIdentifier() Returns the actual NOT found in the string representation of the JPQL query, which has the actual case that was used.
Expression	getExpression() Returns the Expression that represents the state field path expression or type discriminator.
java.lang.String	getExpressionExpressionBNF() Returns the unique identifier of the query BNF that describes the expression being tested by the IN expression.
java.lang.String	getExpressionItemBNF() Returns the unique identifier of the query BNF that describes the items being tested against.
java.lang.String	getIdentifier() Returns the identifier for this expression.
Expression	getInItems() Returns the Expression that represents the list if items.
JPQLQueryBNF	getQueryBNF() Returns the BNF of this Expression.
boolean	hasExpression() Determines whether the state field path expression or type discriminator was parsed.
boolean	hasInItems() Determines whether the list of items was parsed.
boolean	hasLeftParenthesis() Determines whether the open parenthesis was parsed or not.
boolean	hasNot() Determines whether the identifier NOT was parsed.
boolean	hasRightParenthesis() Determines whether the close parenthesis was parsed or not.
boolean	hasSpaceAfterIn() Determines whether there was a whitespace after the IN identifier if the left parenthesis was not 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.
boolean	isSingleInputParameter() Determines whether what was parsed after the IN identifier is a single input parameter: BNF: in_expression ::= {state_field_path_expression | type_discriminator} [NOT] IN collection_valued_input_parameter
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 org.eclipse.persistence.jpa.jpql.parser.AbstractExpression

acceptUnknownVisitor, acceptUnknownVisitor, buildExpressionFromFallingBack, buildNullExpression, buildStringExpression, buildStringExpression, buildUnknownExpression, calculatePosition, children, findFallBackExpressionFactory, getExpressionFactory, getExpressionRegistry, getGrammar, getIdentifierVersion, getJPAVersion, getLength, getOffset, getParent, getQueryBNF, getRoot, getText, handleAggregate, handleCollection, isAncestor, isIdentifier, isNull, isTolerant, isUnknown, isVirtual, orderedChildren, parse, parseUsingExpressionFactory, populatePosition, rebuildActualText, rebuildParsedText, setParent, setText, shouldParseWithFactoryFirst, shouldSkipLiteral, toActualText, toParsedText, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

InExpression

public InExpression(AbstractExpression parent,
                    AbstractExpression expression)

Creates a new InExpression.

Parameters:

parent - The parent of this expression

expression - The state field path expression that was parsed prior of parsing this expression

Method Detail

accept

public void accept(ExpressionVisitor visitor)

Visits this Expression by the given visitor.

Parameters:

visitor - The ExpressionVisitor to visit this object

acceptChildren

public void acceptChildren(ExpressionVisitor visitor)

Visits the children of this 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.

Parameters:

visitor - The visitor to visit the children of this object.

addChildrenTo

protected void addChildrenTo(java.util.Collection<Expression> children)

Adds the children of this AbstractExpression to the given collection.

Overrides:

addChildrenTo in class AbstractExpression

Parameters:

children - The collection used to store the children

addOrderedChildrenTo

protected void addOrderedChildrenTo(java.util.List<Expression> children)

Adds the children of this AbstractExpression to the given list.

Overrides:

addOrderedChildrenTo in class AbstractExpression

Parameters:

children - The list used to store the string representation of this AbstractExpression

findQueryBNF

public JPQLQueryBNF findQueryBNF(Expression expression)

Retrieves the JPQLQueryBNF that represents the fragment of this Expression that was used when parsing the given Expression.

Specified by:

findQueryBNF in interface Expression

Overrides:

findQueryBNF in class AbstractExpression

Parameters:

expression - The Expression that is a descendant of this one

Returns:

The JPQLQueryBNF that was used to parse the given expression

getActualInIdentifier

public java.lang.String getActualInIdentifier()

Returns the actual IN found in the string representation of the JPQL query, which has the actual case that was used.

Returns:

The IN identifier that was actually parsed

getActualNotIdentifier

public java.lang.String getActualNotIdentifier()

Returns the actual NOT found in the string representation of the JPQL query, which has the actual case that was used.

Returns:

The NOT identifier that was actually parsed, or an empty string if it was not parsed

getExpression

public Expression getExpression()

Returns the Expression that represents the state field path expression or type discriminator.

Returns:

The expression that was parsed representing the state field path expression or the type discriminator

getExpressionExpressionBNF

public java.lang.String getExpressionExpressionBNF()

Returns the unique identifier of the query BNF that describes the expression being tested by the IN expression.

Returns:

InExpressionExpressionBNF.ID

getExpressionItemBNF

public java.lang.String getExpressionItemBNF()

Returns the unique identifier of the query BNF that describes the items being tested against.

Returns:

InExpressionItemBNF.ID

getIdentifier

public java.lang.String getIdentifier()

Returns the identifier for this expression.

Returns:

Either IS IN or IN

getInItems

public Expression getInItems()

Returns the Expression that represents the list if items.

Returns:

The expression that was parsed representing the list of items

getQueryBNF

public JPQLQueryBNF getQueryBNF()

Returns the BNF of this Expression.

Returns:

The JPQLQueryBNF, which represents the grammar of this Expression

hasExpression

public boolean hasExpression()

Determines whether the state field path expression or type discriminator was parsed.

Returns:

true if the state field path expression or type discriminator was parsed; false if it was not parsed

hasInItems

public boolean hasInItems()

Determines whether the list of items was parsed.

Returns:

true if at least one item was parsed; false otherwise

hasLeftParenthesis

public boolean hasLeftParenthesis()

Determines whether the open parenthesis was parsed or not.

Returns:

true if the open parenthesis was present in the string version of the query; false otherwise

hasNot

public boolean hasNot()

Determines whether the identifier NOT was parsed.

Returns:

true if the identifier NOT was parsed; false otherwise

hasRightParenthesis

public boolean hasRightParenthesis()

Determines whether the close parenthesis was parsed or not.

Returns:

true if the close parenthesis was present in the string version of the query; false otherwise

hasSpaceAfterIn

public boolean hasSpaceAfterIn()

Determines whether there was a whitespace after the IN identifier if the left parenthesis was not parsed.

Returns:

true if a whitespace was parsed after IN in the string version of the query; false otherwise

Since:

2.4

isParsingComplete

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. The text is never empty.

Overrides:

isParsingComplete in class AbstractExpression

Parameters:

wordParser - The text to parse based on the current position of the cursor

word - The word that was retrieved from the given text, which is the first word in the text

expression - The Expression that has already been parsed

Returns:

true if the text no longer can't be parsed by the current expression; false if more can be parsed

isSingleInputParameter

public boolean isSingleInputParameter()

Determines whether what was parsed after the IN identifier is a single input parameter:

BNF: in_expression ::= {state_field_path_expression | type_discriminator} [NOT] IN collection_valued_input_parameter

Returns:

true if what is following the IN identifier is a single input parameter (without the left or right parenthesis); false otherwise

Since:

2.4

parse

protected void parse(WordParser wordParser,
                     boolean tolerant)

Parses the query by starting at the current position, which is part of the given WordParser.

Specified by:

parse in class AbstractExpression

Parameters:

wordParser - The text to parse based on the current position of the cursor

tolerant - Determines whether the parsing system should be tolerant, meaning if it should try to parse invalid or incomplete queries

toParsedText

protected void toParsedText(java.lang.StringBuilder writer,
                            boolean actual)

Generates a string representation of this Expression, including its children, if it has any.

Specified by:

toParsedText in class AbstractExpression

Parameters:

writer - The buffer used to append this Expression's string representation

actual - 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