org.apache.cayenne.access.trans
Class UpdateTranslator

java.lang.Object
  org.apache.cayenne.access.QueryTranslator
      org.apache.cayenne.access.trans.QueryAssembler
          org.apache.cayenne.access.trans.UpdateTranslator

public class UpdateTranslator
extends QueryAssembler

Class implements default translation mechanism of org.apache.cayenne.query.UpdateQuery objects to SQL UPDATE statements.

Author:

Andrei Adamchik

Field Summary

Fields inherited from class org.apache.cayenne.access.trans.QueryAssembler

attributes, values

Fields inherited from class org.apache.cayenne.access.QueryTranslator

adapter, connection, engine, entityResolver, query

Constructor Summary

UpdateTranslator()

Method Summary

java.lang.String	aliasForTable(DbEntity dbEnt) Returns a name that can be used as column alias.
java.lang.String	createSqlString() Method that converts an update query into SQL string
void	dbRelationshipAdded(DbRelationship dbRel) Processes a join being added.

Methods inherited from class org.apache.cayenne.access.trans.QueryAssembler

addToParamList, aliasForTable, createStatement, initStatement, supportsTableAliases

Methods inherited from class org.apache.cayenne.access.QueryTranslator

createStatement, getAdapter, getCon, getConnection, getEngine, getEntityResolver, getQuery, getRootDbEntity, getRootEntity, getRootInheritanceTree, setAdapter, setCon, setConnection, setEngine, setEntityResolver, setQuery

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

UpdateTranslator

public UpdateTranslator()

Method Detail

aliasForTable

public java.lang.String aliasForTable(DbEntity dbEnt)

Description copied from class: QueryAssembler

Returns a name that can be used as column alias. This can be one of the following:

• an alias for this table, if it uses aliases
• a fully qualified table name, if not.

CayenneRuntimeException is thrown if a table alias can not be created.

Specified by:

aliasForTable in class QueryAssembler

dbRelationshipAdded

public void dbRelationshipAdded(DbRelationship dbRel)

Description copied from class: QueryAssembler

Processes a join being added.

Specified by:

dbRelationshipAdded in class QueryAssembler

createSqlString

public java.lang.String createSqlString()
                                 throws java.lang.Exception

Method that converts an update query into SQL string

Specified by:

createSqlString in class QueryAssembler

Throws:

java.lang.Exception