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 ObjEntity
currentEntity
protected String
fullPath
protected String
idPath
protected boolean
innerJoin
protected String
joinMarker
protected String
lastAlias
protected String
lastPathComponent
Fields inherited from class org.apache.cayenne.ejbql.EJBQLBaseVisitor
continueFlag
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Constructor Summary
Constructors Constructor Description EJBQLPathTranslator(EJBQLTranslationContext context)
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Method Summary
Modifier and Type Method Description protected abstract void
appendMultiColumnPath(EJBQLMultiColumnOperand operand)
protected DbRelationship
chooseDbRelationship(ObjRelationship relationship)
Checks if the object relationship is flattened and then chooses the corresponding db relationship.boolean
isUsingAliases()
protected void
processIntermediatePathComponent()
protected void
processLastPathComponent()
protected void
processTerminatingAttribute(ObjAttribute attribute)
protected void
processTerminatingRelationship(ObjRelationship relationship)
protected void
resolveJoin()
protected void
resolveLastPathComponent(String pathComponent)
void
setUsingAliases(boolean usingAliases)
boolean
visitIdentificationVariable(EJBQLExpression expression)
boolean
visitIdentifier(EJBQLExpression expression)
boolean
visitPath(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:EJBQLExpressionVisitor
Called on visiting "path" expression and also after visiting every expression child.- Specified by:
visitPath
in interfaceEJBQLExpressionVisitor
- Overrides:
visitPath
in 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:
visitIdentifier
in interfaceEJBQLExpressionVisitor
- Overrides:
visitIdentifier
in classEJBQLBaseVisitor
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visitIdentificationVariable
- Specified by:
visitIdentificationVariable
in interfaceEJBQLExpressionVisitor
- Overrides:
visitIdentificationVariable
in 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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