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java.lang.Objectorg.apache.cayenne.access.QueryTranslator
org.apache.cayenne.access.trans.QueryAssembler
org.apache.cayenne.access.trans.SelectTranslator
public class SelectTranslator
A builder of JDBC PreparedStatements based on Cayenne SelectQueries. Translates SelectQuery to parameterized SQL string and wraps it in a PreparedStatement. SelectTranslator is stateful and thread-unsafe.
| Field Summary | |
|---|---|
protected static int[] |
UNSUPPORTED_DISTINCT_TYPES
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| Fields inherited from class org.apache.cayenne.access.trans.QueryAssembler |
|---|
attributes, values |
| Fields inherited from class org.apache.cayenne.access.QueryTranslator |
|---|
adapter, connection, entityResolver, query |
| Constructor Summary | |
|---|---|
SelectTranslator()
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| Method Summary | |
|---|---|
String |
createSqlString()
Returns query translated to SQL. |
void |
dbRelationshipAdded(DbRelationship relationship,
JoinType joinType,
String joinSplitAlias)
Appends a join with given semantics to the query. |
Map |
getAttributeOverrides()
Returns a map of ColumnDescriptors keyed by ObjAttribute for columns that may need to be reprocessed manually due to incompatible mappings along the inheritance hierarchy. |
String |
getCurrentAlias()
Returns an alias of the table which is currently at the top of the join stack. |
ColumnDescriptor[] |
getResultColumns()
Returns a list of ColumnDescriptors for the query columns. |
boolean |
isSuppressingDistinct()
Returns true if SelectTranslator determined that a query requiring DISTINCT can't be run with DISTINCT keyword for internal reasons. |
protected static boolean |
isUnsupportedForDistinct(int type)
|
void |
resetJoinStack()
A callback invoked by a child qualifier or ordering processor allowing query assembler to reset its join stack. |
boolean |
supportsTableAliases()
Always returns true. |
| Methods inherited from class org.apache.cayenne.access.trans.QueryAssembler |
|---|
addToParamList, createStatement, getPathAliases, initStatement |
| Methods inherited from class org.apache.cayenne.access.QueryTranslator |
|---|
getAdapter, getConnection, getEntityResolver, getQuery, getRootDbEntity, getRootEntity, getRootInheritanceTree, setAdapter, setConnection, setEntityResolver, setQuery |
| Methods inherited from class java.lang.Object |
|---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Field Detail |
|---|
protected static final int[] UNSUPPORTED_DISTINCT_TYPES
| Constructor Detail |
|---|
public SelectTranslator()
| Method Detail |
|---|
protected static boolean isUnsupportedForDistinct(int type)
public String createSqlString()
throws Exception
createSqlString in class QueryAssemblerExceptionpublic String getCurrentAlias()
QueryAssembler
getCurrentAlias in class QueryAssemblerpublic ColumnDescriptor[] getResultColumns()
public Map getAttributeOverrides()
public boolean isSuppressingDistinct()
public void resetJoinStack()
QueryAssembler
resetJoinStack in class QueryAssembler
public void dbRelationshipAdded(DbRelationship relationship,
JoinType joinType,
String joinSplitAlias)
QueryAssembler
dbRelationshipAdded in class QueryAssemblerpublic boolean supportsTableAliases()
supportsTableAliases in class QueryAssembler
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