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org.objectstyle.cayenne.access.trans
Class QueryAssembler  

java.lang.Object
  org.objectstyle.cayenne.access.QueryTranslator
      org.objectstyle.cayenne.access.trans.QueryAssembler

Direct Known Subclasses:

DeleteTranslator, InsertTranslator, SelectQueryAssembler, SelectTranslator, SqlModifyTranslator, SqlSelectTranslator, UpdateTranslator

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public abstract class QueryAssembler

extends org.objectstyle.cayenne.access.QueryTranslator

Abstract superclass of Query translators.

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Field Summary
protected  java.util.List	attributes           PreparedStatement attributes matching entries in values list.
private static org.apache.log4j.Logger	logObj
protected  java.util.List	values           PreparedStatement values.

 

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

adapter, con, engine, query

 

Constructor Summary

QueryAssembler()

 

Method Summary
void	addToParamList(org.objectstyle.cayenne.map.DbAttribute dbAttr, java.lang.Object anObject)           Registers anObject as a PreparedStatement paramter.
abstract  java.lang.String	aliasForTable(org.objectstyle.cayenne.map.DbEntity dbEnt)           Returns a name that can be used as column alias.
java.lang.String	aliasForTable(org.objectstyle.cayenne.map.DbEntity ent, org.objectstyle.cayenne.map.DbRelationship rel)
abstract  java.lang.String	createSqlString()           Translates query into sql string.
java.sql.PreparedStatement	createStatement(org.apache.log4j.Level logLevel)           Translates internal query into PreparedStatement.
abstract  void	dbRelationshipAdded(org.objectstyle.cayenne.map.DbRelationship dbRel)           Processes a join being added.
protected  void	initStatement(java.sql.PreparedStatement stmt)           Initializes prepared statements with collected parameters.
boolean	supportsTableAliases()           Returns true if table aliases are supported.

 

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

getAdapter, getCon, getEngine, getQuery, getRootDbEntity, getRootEntity, setAdapter, setCon, setEngine, setQuery

 

Methods inherited from class java.lang.Object

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

 

Field Detail

logObj

private static org.apache.log4j.Logger logObj

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values

protected java.util.List values

PreparedStatement values.

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attributes

protected java.util.List attributes

PreparedStatement attributes matching entries in values list.

Constructor Detail

QueryAssembler

public QueryAssembler()

Method Detail

dbRelationshipAdded

public abstract void dbRelationshipAdded(org.objectstyle.cayenne.map.DbRelationship dbRel)

Processes a join being added.

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createSqlString

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

Translates query into sql string. This is a workhorse method of QueryAssembler. It is called internally from createStatement. Usually there is no need to invoke it explicitly.

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aliasForTable

public java.lang.String aliasForTable(org.objectstyle.cayenne.map.DbEntity ent,
                                      org.objectstyle.cayenne.map.DbRelationship rel)

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aliasForTable

public abstract java.lang.String aliasForTable(org.objectstyle.cayenne.map.DbEntity dbEnt)

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.

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supportsTableAliases

public boolean supportsTableAliases()

Returns true if table aliases are supported. Default implementation returns false.

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addToParamList

public void addToParamList(org.objectstyle.cayenne.map.DbAttribute dbAttr,
                           java.lang.Object anObject)

Registers anObject as a PreparedStatement paramter.

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createStatement

public java.sql.PreparedStatement createStatement(org.apache.log4j.Level logLevel)
                                           throws java.lang.Exception

Translates internal query into PreparedStatement.

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initStatement

protected void initStatement(java.sql.PreparedStatement stmt)
                      throws java.lang.Exception

Initializes prepared statements with collected parameters. Called internally from "createStatement". Cayenne users shouldn't normally call it directly.

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Overview  Package   Class  Use  Deprecated  Index
Home >> All >> org >> objectstyle >> cayenne >> access >> [ trans overview ]	PREV CLASS  NEXT CLASS
SUMMARY:  JAVADOC |  SOURCE |  DOWNLOAD | NESTED | FIELD | CONSTR | METHOD	DETAIL: FIELD | CONSTR | METHOD

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