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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
|
| 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 |
aliasForTable(DbEntity ent)
Overrides superclass implementation. |
String |
aliasForTable(DbEntity ent,
DbRelationship rel)
|
String |
createSqlString()
Returns query translated to SQL. |
void |
dbRelationshipAdded(DbRelationship rel)
Stores a new relationship in an internal list. |
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. |
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)
|
protected String |
newAliasForTable(DbEntity ent)
Sets up and returns a new alias for a speciafied table. |
boolean |
supportsTableAliases()
Always returns true. |
| Methods inherited from class org.apache.cayenne.access.trans.QueryAssembler |
|---|
addToParamList, createStatement, 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 ColumnDescriptor[] getResultColumns()
public Map getAttributeOverrides()
public boolean isSuppressingDistinct()
public void dbRelationshipAdded(DbRelationship rel)
dbRelationshipAdded in class QueryAssemblerprotected String newAliasForTable(DbEntity ent)
public String aliasForTable(DbEntity ent,
DbRelationship rel)
aliasForTable in class QueryAssemblerpublic String aliasForTable(DbEntity ent)
aliasForTable in class QueryAssemblerpublic boolean supportsTableAliases()
supportsTableAliases in class QueryAssembler
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