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java.lang.Objectorg.apache.cayenne.access.trans.QueryAssembler
public abstract class QueryAssembler
Abstract superclass of Query translators.
Field Summary | |
---|---|
protected DbAdapter |
adapter
|
protected List<DbAttribute> |
attributes
PreparedStatement attributes matching entries in values list. |
protected Connection |
connection
|
protected EntityResolver |
entityResolver
|
protected int |
parameterIndex
The index parameter will be inserted at in parameter list |
protected Query |
query
|
protected QueryMetadata |
queryMetadata
|
protected List<Object> |
values
Holds PreparedStatement values. |
Constructor Summary | |
---|---|
QueryAssembler()
|
Method Summary | |
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void |
addToParamList(DbAttribute dbAttr,
Object anObject)
Registers anObject as a PreparedStatement parameter. |
abstract String |
createSqlString()
Translates query into sql string. |
PreparedStatement |
createStatement()
Translates internal query into PreparedStatement. |
abstract void |
dbRelationshipAdded(DbRelationship relationship,
JoinType joinType,
String joinSplitAlias)
Appends a join with given semantics to the query. |
DbAdapter |
getAdapter()
|
abstract String |
getCurrentAlias()
Returns an alias of the table which is currently at the top of the join stack. |
EntityResolver |
getEntityResolver()
|
protected Map<String,String> |
getPathAliases()
Returns aliases for the path splits defined in the query. |
Query |
getQuery()
Returns query object being processed. |
QueryMetadata |
getQueryMetadata()
|
DbEntity |
getRootDbEntity()
|
ObjEntity |
getRootEntity()
|
EntityInheritanceTree |
getRootInheritanceTree()
Returns an EntityInheritanceTree for the root entity. |
protected void |
initStatement(PreparedStatement stmt)
Initializes prepared statements with collected parameters. |
abstract void |
resetJoinStack()
A callback invoked by a child qualifier or ordering processor allowing query assembler to reset its join stack. |
void |
setAdapter(DbAdapter adapter)
|
void |
setConnection(Connection connection)
|
void |
setEntityResolver(EntityResolver entityResolver)
|
void |
setQuery(Query query)
|
boolean |
supportsTableAliases()
Returns true if table aliases are supported. |
Methods inherited from class java.lang.Object |
---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
---|
protected Query query
protected QueryMetadata queryMetadata
protected Connection connection
protected DbAdapter adapter
protected EntityResolver entityResolver
protected List<Object> values
protected List<DbAttribute> attributes
values
list.
protected int parameterIndex
Constructor Detail |
---|
public QueryAssembler()
Method Detail |
---|
protected Map<String,String> getPathAliases()
public EntityResolver getEntityResolver()
public DbAdapter getAdapter()
public EntityInheritanceTree getRootInheritanceTree()
public Query getQuery()
public QueryMetadata getQueryMetadata()
public void setQuery(Query query)
public void setConnection(Connection connection)
public void setAdapter(DbAdapter adapter)
public void setEntityResolver(EntityResolver entityResolver)
public DbEntity getRootDbEntity()
public ObjEntity getRootEntity()
public abstract void resetJoinStack()
public abstract String getCurrentAlias()
public abstract void dbRelationshipAdded(DbRelationship relationship, JoinType joinType, String joinSplitAlias)
public abstract String createSqlString() throws Exception
createStatement
. Usually there is no need to
invoke it explicitly.
Exception
public boolean supportsTableAliases()
true
if table aliases are supported. Default implementation
returns false.
public void addToParamList(DbAttribute dbAttr, Object anObject)
anObject
as a PreparedStatement parameter.
anObject
- object that represents a value of DbAttributedbAttr
- DbAttribute being processed.public PreparedStatement createStatement() throws Exception
Exception
protected void initStatement(PreparedStatement stmt) throws Exception
Exception
|
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