- All Implemented Interfaces:
EventListener,ParseListener
ParseListener.
Use this to stay compatible with future API changes (i.e. added methods to
ParseListener)
- Author:
- Lukas Eder
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionAttempt to parse aConditionexpression.voidparseEnd(ParseContext ctx) Callback method invoked after the parser successfully completes parsing a SQL string.Field<?>parseField(ParseContext ctx) Attempt to parse aFieldexpression.voidparseStart(ParseContext ctx) Callback method invoked before the parser starts parsing a SQL string.Table<?>parseTable(ParseContext ctx) Attempt to parse aTableexpression.
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Constructor Details
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DefaultParseListener
public DefaultParseListener()
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Method Details
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parseStart
Description copied from interface:ParseListenerCallback method invoked before the parser starts parsing a SQL string.Use this to perform quick modifications to the SQL string where necessary, e.g. by removing unsupported (but irrelevant) syntax from the input string of
ParseContext.characters().- Specified by:
parseStartin interfaceParseListener
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parseEnd
Description copied from interface:ParseListenerCallback method invoked after the parser successfully completes parsing a SQL string.Use this to clean up resources or perform post-parsing validations.
- Specified by:
parseEndin interfaceParseListener
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parseField
Description copied from interface:ParseListenerAttempt to parse aFieldexpression.This parses a "term", meaning the callback does not interfere with any operators or operator precedence, but will be called only when a field term can appear. For example, with input SQL like
A + B, the callback is called at the positions ofAandB. Client code does not have to (and should not) handle the+operator, or its precedence.- Specified by:
parseFieldin interfaceParseListener- Returns:
- The
Fieldexpression if a field could be parsed, ornullotherwise.
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parseTable
Description copied from interface:ParseListenerAttempt to parse aTableexpression.This parses a "table factor", meaning the callback does not interfere with any operators or operator precedence, but will be called only when a condition term can appear. For example, with input SQL like
A join B, the callback is called at the positions ofAandB. Client code does not have to (and should not) handle thejoinoperator, or its precedence.- Specified by:
parseTablein interfaceParseListener- Returns:
- The
Tableexpression if a table could be parsed, ornullotherwise.
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parseCondition
Description copied from interface:ParseListenerAttempt to parse aConditionexpression.This parses a "predicate", meaning the callback does not interfere with any operators or operator precedence, but will be called only when a condition term can appear. For example, with input SQL like
A or B, the callback is called at the positions ofAandB. Client code does not have to (and should not) handle theoroperator, or its precedence.- Specified by:
parseConditionin interfaceParseListener- Returns:
- The
Conditionexpression if a condition could be parsed, ornullotherwise.
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