public class DefaultQueryVisitor extends Object implements Visitor
Modifier and Type | Field and Description |
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protected StringBuilder |
_queryString
StringBuilder used to append query string.
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protected static org.apache.commons.logging.Log |
LOG
The Jakarta
Commons Logging instance used for all logging.
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Constructor and Description |
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DefaultQueryVisitor() |
Modifier and Type | Method and Description |
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protected void |
addTableNames(Qualifier qualifier)
Method adding table-names in case of joins.
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protected String |
getSequenceNextValString(String seqName)
Returns the database engine specific string to fetch sequence next value.
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protected void |
handleJoinConstruction(Qualifier qualifier)
Method handling construction of joins.
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protected void |
handleLock(Select select)
Method appending lock clauses as "FOR UPDATE" when needed.
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protected String |
quoteName(String name)
Method returning prepared string to match requirements of specific databases
if needed.
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String |
toString()
Method returning constructed String.
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void |
visit(AndCondition andCondition)
Visit method to handle
AndCondition elements. |
void |
visit(Assignment assignment)
Visit method to handle
Assignment elements. |
void |
visit(Column column)
Visit method to handle
Column elements. |
void |
visit(Compare compare)
Visit method to handle
Compare elements. |
void |
visit(Delete delete)
Visit method to handle
Delete elements. |
void |
visit(Insert insert)
Visit method to handle
Insert elements. |
void |
visit(IsNullPredicate isNullPredicate)
Visit method to handle
IsNullPredicate elements. |
void |
visit(Join join)
Visit method to handle
Join elements. |
void |
visit(NextVal nextVal)
Visit method to handle
NextVal elements. |
void |
visit(OrCondition orCondition)
Visit method to handle
OrCondition elements. |
void |
visit(Parameter parameter)
Visit method to handle
Parameter elements. |
void |
visit(Select select)
Visit method to handle select elements.
|
void |
visit(Table table)
Visit method to handle
Table elements. |
void |
visit(TableAlias tableAlias)
Visit method to handle
TableAlias elements. |
void |
visit(Update update)
Visit method to handle update elements.
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protected final StringBuilder _queryString
protected static final org.apache.commons.logging.Log LOG
public void visit(Assignment assignment)
Assignment
elements.public void visit(Delete delete)
Delete
elements.public void visit(Insert insert)
Insert
elements.public void visit(Join join)
Join
elements.public void visit(Select select)
protected final void handleJoinConstruction(Qualifier qualifier)
qualifier
- Qualifier to process joins from.protected void addTableNames(Qualifier qualifier)
qualifier
- Qualifier to add names frompublic void visit(Table table)
Table
elements.public void visit(TableAlias tableAlias)
TableAlias
elements.public void visit(Update update)
public void visit(AndCondition andCondition)
AndCondition
elements.public void visit(Compare compare)
Compare
elements.public void visit(IsNullPredicate isNullPredicate)
IsNullPredicate
elements.public void visit(OrCondition orCondition)
OrCondition
elements.public void visit(Column column)
Column
elements.public void visit(NextVal nextVal)
NextVal
elements.public void visit(Parameter parameter)
Parameter
elements.protected String quoteName(String name)
name
- String to be prepared.protected String getSequenceNextValString(String seqName)
seqName
- Name of the sequence.protected void handleLock(Select select)
select
- Select to check if locking-clauses have to be appended or not.Copyright © 2016. All rights reserved.