Class AbstractConditionalClause

  • All Implemented Interfaces:
    Direct Known Subclasses:
    HavingClause, OnClause, StartWithClause, WhereClause

    public abstract class AbstractConditionalClause
    extends AbstractExpression
    Conditional expressions are composed of other conditional expressions, comparison operations, logical operations, path expressions that evaluate to boolean values, boolean literals, and boolean input parameters. Arithmetic expressions can be used in comparison expressions. Arithmetic expressions are composed of other arithmetic expressions, arithmetic operations, path expressions that evaluate to numeric values, numeric literals, and numeric input parameters. Arithmetic operations use numeric promotion. Standard bracketing () for ordering expression evaluation is supported.
    BNF: expression ::= identifier conditional_expression

    See Also:
    HavingClause, OnClause, StartWithClause, WhereClause
    Pascal Filion
    • Constructor Detail

      • AbstractConditionalClause

        protected AbstractConditionalClause​(AbstractExpression parent,
                                            java.lang.String identifier)
        Creates a new AbstractConditionalClause.
        parent - The parent of this expression
        identifier - The identifier of this conditional clause
    • Method Detail

      • buildCollectionExpression

        public CollectionExpression buildCollectionExpression()
        Creates a new CollectionExpression that will wrap the single select item.
        The single select item represented by a temporary collection
      • getActualIdentifier

        public final java.lang.String getActualIdentifier()
        Returns the actual identifier found in the string representation of the JPQL query, which has the actual case that was used.
        The identifier that was actually parsed
      • getConditionalExpression

        public final Expression getConditionalExpression()
        Returns the expression representing the composition of the conditional expressions.
        The actual conditional expression
      • getIdentifier

        public final java.lang.String getIdentifier()
        Returns the JPQL identifier of this expression.
        The JPQL identifier
      • hasConditionalExpression

        public final boolean hasConditionalExpression()
        Determines whether the conditional expression was parsed.
        true if there is a conditional expression; false otherwise
      • hasSpaceAfterIdentifier

        public final boolean hasSpaceAfterIdentifier()
        Determines whether a whitespace was parsed after the identifier or not.
        true if there was a whitespace after the identifier; false otherwise
      • 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.
        isParsingComplete in class AbstractExpression
        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
        true if the text no longer can't be parsed by the current expression; false if more can be parsed
      • parse

        protected final 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
        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
      • shouldSkipLiteral

        protected boolean shouldSkipLiteral​(AbstractExpression expression)
        When parsing an invalid or incomplete query, it is possible two literals would be parsed but in some cases, a CollectionExpression should not be created and the parsing should actually stop here. Example: BETWEEN 10 20, when parsing 20, it should not be parsed as part of the lower bound expression.
        shouldSkipLiteral in class AbstractExpression
        expression - The Expression that has just been parsed or null
      • toParsedText

        protected final 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
        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