EclipseLink Core 4.0.2 · org.eclipse.persistence.internal.expressions.ExpressionNormalizer

Field Summary

Modifier and Type	Field and Description
protected boolean	addAdditionalExpressionsWithinCurrrentExpressionContext Used to trigger adding additional join operations etc to the expression being processed instead of at the end of the where clause.
protected Expression	additionalExpression A new root expression can be made from joins being added to the original expression.
protected Expression	additionalLocalExpression Local expression from joins being added to the original expression.
protected Map<Expression, Expression>	clonedExpressions Used to maintain identity of cloned expressions.
protected AbstractSession	session The session being normalized in.
protected SQLSelectStatement	statement The statement being normalized.
protected List<SubSelectExpression>	subSelectExpressions Subselect expressions found in the course of normalization.

Constructor Summary

Access	Constructor and Description
public	ExpressionNormalizer(SQLSelectStatement statement)

Method Summary

Modifier and Type	Method and Description
public void	addAdditionalExpression(Expression theExpression)
public void	addAdditionalLocalExpression(Expression theExpression) Similar to addAdditionalExpression, this keeps a running expression used for joins so that they can be added locally within 'OR' predicates rather than to the entire where clause.
public void	addSubSelectExpression(SubSelectExpression subSelectExpression) INTERNAL: Remember this subselect so that it can be normalized after the enclosing select statement is.
public boolean	encounteredSubSelectExpressions() INTERNAL: Were subselect expressions found while normalizing the selection criteria?
public Expression	getAdditionalExpression()
public Map<Expression, Expression>	getClonedExpressions()
public AbstractSession	getSession()
public SQLSelectStatement	getStatement()
public boolean	isAddAdditionalExpressionsWithinCurrrentExpressionContext()
public void	normalizeSubSelects(Map<K, V> clonedExpressions) INTERNAL: Normalize all subselect expressions found in the course of normalizing the enclosing query.
public Expression	processAdditionalLocalExpressions(Expression localExpression, boolean isLogicalExpression) INTERNAL This will return the localExpression if isLogicalExpression is false, otherwise it will check the addAdditionalExpressionsWithinCurrrentExpressionContext flag and clear additionalLocalExpression once adding it to the localExpression.
public void	setAddAdditionalExpressionsWithinCurrrentExpressionContext(boolean addAdditionalExpressionsWithinCurrrentExpressionContext) INTERNAL: Allows keeping track when the normalizer is within a logical OR statement, where additionalExpressions might need to be added to the local expression instead of at the end of the where clause.
public void	setAdditionalExpression(Expression additionalExpression)
public void	setClonedExpressions(Map<Expression, Expression> clonedExpressions)
public void	setSession(AbstractSession session)
public void	setStatement(SQLSelectStatement statement)

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll toString wait wait wait

Field Detail

addAdditionalExpressionsWithinCurrrentExpressionContext	back to summary
protected boolean addAdditionalExpressionsWithinCurrrentExpressionContext Used to trigger adding additional join operations etc to the expression being processed instead of at the end of the where clause. Useful for dealing with Treat within an Or clause, as the type expression needs to be appended within the OR condition rather AND'd to the entire thing.

additionalExpression	back to summary
protected Expression additionalExpression A new root expression can be made from joins being added to the original expression.

additionalLocalExpression	back to summary
protected Expression additionalLocalExpression Local expression from joins being added to the original expression.

clonedExpressions	back to summary
protected Map<Expression, Expression> clonedExpressions Used to maintain identity of cloned expressions.

session	back to summary
protected AbstractSession session The session being normalized in.

statement	back to summary
protected SQLSelectStatement statement The statement being normalized.

subSelectExpressions	back to summary
protected List<SubSelectExpression> subSelectExpressions Subselect expressions found in the course of normalization.

Constructor Detail

ExpressionNormalizer	back to summary
public ExpressionNormalizer(SQLSelectStatement statement)

Method Detail

addAdditionalExpression	back to summary
public void addAdditionalExpression(Expression theExpression)

addAdditionalLocalExpression	back to summary
public void addAdditionalLocalExpression(Expression theExpression) Similar to addAdditionalExpression, this keeps a running expression used for joins so that they can be added locally within 'OR' predicates rather than to the entire where clause. If addAdditionalExpressionsWithinCurrrentExpressionContext is false, it will work the same as addAdditionalExpression

addSubSelectExpression	back to summary
public void addSubSelectExpression(SubSelectExpression subSelectExpression) INTERNAL: Remember this subselect so that it can be normalized after the enclosing select statement is.

encounteredSubSelectExpressions	back to summary
public boolean encounteredSubSelectExpressions() INTERNAL: Were subselect expressions found while normalizing the selection criteria? Assumes underlying collection is initialized on first add.

getAdditionalExpression	back to summary
public Expression getAdditionalExpression()

getClonedExpressions	back to summary
public Map<Expression, Expression> getClonedExpressions()

getSession	back to summary
public AbstractSession getSession()

getStatement	back to summary
public SQLSelectStatement getStatement()

isAddAdditionalExpressionsWithinCurrrentExpressionContext	back to summary
public boolean isAddAdditionalExpressionsWithinCurrrentExpressionContext()

normalizeSubSelects	back to summary
public void normalizeSubSelects(Map<K, V> clonedExpressions) INTERNAL: Normalize all subselect expressions found in the course of normalizing the enclosing query. This method allows one to completely normalize the parent statement first (which should treat its sub selects as black boxes), and then normalize the subselects (which require full knowledge of the enclosing statement). This should make things clearer too, Assumes encounteredSubSelectExpressions() true. For CR#4223.

normalizeSubSelects

back to summary

public void normalizeSubSelects(Map<K, V> clonedExpressions)

INTERNAL: Normalize all subselect expressions found in the course of normalizing the enclosing query. This method allows one to completely normalize the parent statement first (which should treat its sub selects as black boxes), and then normalize the subselects (which require full knowledge of the enclosing statement). This should make things clearer too, Assumes encounteredSubSelectExpressions() true. For CR#4223.

processAdditionalLocalExpressions	back to summary
public Expression processAdditionalLocalExpressions(Expression localExpression, boolean isLogicalExpression) INTERNAL This will return the localExpression if isLogicalExpression is false, otherwise it will check the addAdditionalExpressionsWithinCurrrentExpressionContext flag and clear additionalLocalExpression once adding it to the localExpression.

setAddAdditionalExpressionsWithinCurrrentExpressionContext	back to summary
public void setAddAdditionalExpressionsWithinCurrrentExpressionContext(boolean addAdditionalExpressionsWithinCurrrentExpressionContext) INTERNAL: Allows keeping track when the normalizer is within a logical OR statement, where additionalExpressions might need to be added to the local expression instead of at the end of the where clause.

setAdditionalExpression	back to summary
public void setAdditionalExpression(Expression additionalExpression)

setClonedExpressions	back to summary
public void setClonedExpressions(Map<Expression, Expression> clonedExpressions)

setSession	back to summary
public void setSession(AbstractSession session)