Class EJBQLPathTranslator
java.lang.Object
org.apache.cayenne.ejbql.EJBQLBaseVisitor
org.apache.cayenne.access.translator.ejbql.EJBQLPathTranslator
- All Implemented Interfaces:
EJBQLExpressionVisitor
public abstract class EJBQLPathTranslator extends EJBQLBaseVisitor
A translator that walks the relationship/attribute path, appending joins to
the query.
- Since:
- 3.0
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Field Summary
Fields Modifier and Type Field Description protected ObjEntitycurrentEntityprotected StringfullPathprotected StringidPathprotected booleaninnerJoinprotected StringjoinMarkerprotected StringlastAliasprotected StringlastPathComponentFields inherited from class org.apache.cayenne.ejbql.EJBQLBaseVisitor
continueFlag -
Constructor Summary
Constructors Constructor Description EJBQLPathTranslator(EJBQLTranslationContext context) -
Method Summary
Modifier and Type Method Description protected abstract voidappendMultiColumnPath(EJBQLMultiColumnOperand operand)protected DbRelationshipchooseDbRelationship(ObjRelationship relationship)Checks if the object relationship is flattened and then chooses the corresponding db relationship.booleanisUsingAliases()protected voidprocessIntermediatePathComponent()protected voidprocessLastPathComponent()protected voidprocessTerminatingAttribute(ObjAttribute attribute)protected voidprocessTerminatingRelationship(ObjRelationship relationship)protected voidresolveJoin()protected voidresolveLastPathComponent(String pathComponent)voidsetUsingAliases(boolean usingAliases)booleanvisitIdentificationVariable(EJBQLExpression expression)booleanvisitIdentifier(EJBQLExpression expression)booleanvisitPath(EJBQLExpression expression, int finishedChildIndex)Called on visiting "path" expression and also after visiting every expression child.Methods inherited from class org.apache.cayenne.ejbql.EJBQLBaseVisitor
visitAbs, visitAbstractSchemaName, visitAdd, visitAggregate, visitAll, visitAnd, visitAny, visitAscending, visitAverage, visitBetween, visitBooleanLiteral, visitClassName, visitConcat, visitConstructor, visitConstructorParameter, visitConstructorParameters, visitCount, visitCurrentDate, visitCurrentTime, visitCurrentTimestamp, visitDbPath, visitDecimalLiteral, visitDelete, visitDescending, visitDistinct, visitDivide, visitEquals, visitEscapeCharacter, visitExists, visitFrom, visitFromItem, visitGreaterOrEqual, visitGreaterThan, visitGroupBy, visitHaving, visitIn, visitInnerFetchJoin, visitInnerJoin, visitIntegerLiteral, visitIsEmpty, visitIsNull, visitLength, visitLessOrEqual, visitLessThan, visitLike, visitLocate, visitLower, visitMax, visitMemberOf, visitMin, visitMod, visitMultiply, visitNamedInputParameter, visitNamedInputParameterForIn, visitNegative, visitNot, visitNotEquals, visitOr, visitOrderBy, visitOrderByItem, visitOuterFetchJoin, visitOuterJoin, visitPatternValue, visitPositionalInputParameter, visitPositionalInputParameterForIn, visitSelect, visitSelectClause, visitSelectExpression, visitSelectExpressions, visitSize, visitSqrt, visitStringLiteral, visitSubselect, visitSubstring, visitSubtract, visitSum, visitTok, visitTrim, visitTrimBoth, visitTrimCharacter, visitTrimLeading, visitTrimTrailing, visitUpdate, visitUpdateField, visitUpdateItem, visitUpdateValue, visitUpper, visitWhere
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Field Details
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currentEntity
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lastPathComponent
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innerJoin
protected boolean innerJoin -
lastAlias
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idPath
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joinMarker
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fullPath
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Constructor Details
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EJBQLPathTranslator
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Method Details
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appendMultiColumnPath
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visitPath
Description copied from interface:EJBQLExpressionVisitorCalled on visiting "path" expression and also after visiting every expression child.- Specified by:
visitPathin interfaceEJBQLExpressionVisitor- Overrides:
visitPathin classEJBQLBaseVisitor- Parameters:
expression- a "path" node being visited.finishedChildIndex- "-1" when the expression node is visited for the first time, before its children; otherwise this is an index of a child just visited.
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visitIdentifier
- Specified by:
visitIdentifierin interfaceEJBQLExpressionVisitor- Overrides:
visitIdentifierin classEJBQLBaseVisitor
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visitIdentificationVariable
- Specified by:
visitIdentificationVariablein interfaceEJBQLExpressionVisitor- Overrides:
visitIdentificationVariablein classEJBQLBaseVisitor
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resolveLastPathComponent
- Since:
- 4.0
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resolveJoin
protected void resolveJoin() -
processIntermediatePathComponent
protected void processIntermediatePathComponent() -
processLastPathComponent
protected void processLastPathComponent() -
processTerminatingAttribute
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processTerminatingRelationship
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chooseDbRelationship
Checks if the object relationship is flattened and then chooses the corresponding db relationship. The last in idPath if isFlattened and the first in list otherwise.- Parameters:
relationship- the object relationship- Returns:
DbRelationship
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isUsingAliases
public boolean isUsingAliases() -
setUsingAliases
public void setUsingAliases(boolean usingAliases)
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