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package oracle.toplink.essentials.queryframework;
// Java imports
import java.sql.*;
import java.io.*;
// TopLink imports
import oracle.toplink.essentials.internal.databaseaccess.*;
import oracle.toplink.essentials.internal.queryframework.*;
import oracle.toplink.essentials.internal.parsing.ejbql.*;
import oracle.toplink.essentials.internal.sessions.AbstractRecord;
import oracle.toplink.essentials.internal.sessions.AbstractSession;
/**
* <b>Purpose</b>: Used as an abstraction of a database invocation.
* A call is an EJBQL string.
* <p><b>Responsibilities</b>:<ul>
* <li> Parse the EJBQL String
* <li> Populate the contained query's selection criteria. Add attributes to ReportQuery (if required).
* </ul>
* @author Jon Driscoll and Joel Lucuik
* @since TopLink 4.0
*/
/**
* <b>Purpose</b>: Used as an abstraction of a database invocation.
* A call is an EJBQL string.
*/
public class EJBQLCall implements Serializable, Call {
// Back reference to query, unfortunately required for events.
protected DatabaseQuery query;
protected String ejbqlString;
// Check that we aren't parsing more than once
protected boolean isParsed;
/**
* PUBLIC
* Create a new EJBQLCall.
*/
public EJBQLCall() {
super();
}
/**
* PUBLIC
* Create a new EJBQLCall with an ejbqlString
*/
public EJBQLCall(String ejbqlString) {
this();
this.ejbqlString = ejbqlString;
}
/**
* INTERNAL:
* Return the appropriate mechanism,
* with the call added as necessary.
*/
public DatabaseQueryMechanism buildNewQueryMechanism(DatabaseQuery query) {
return new EJBQLCallQueryMechanism(query, this);
}
//bug4324564: removed buildParserFor to remove Antlr.jar compile dependency -CD
// See class oracle.toplink.essentials.internal.parsing.ejbql.EJBQLParserFactory.buildParserFor
/**
* INTERNAL:
* Return the appropriate mechanism,
* with the call added as necessary.
*/
public DatabaseQueryMechanism buildQueryMechanism(DatabaseQuery query, DatabaseQueryMechanism mechanism) {
return buildNewQueryMechanism(query);
}
public Object clone() {
try {
return super.clone();
} catch (CloneNotSupportedException cnse) {
return null;
}
}
/**
* INTERNAL:
* Return the string for the call
*/
public String getCallString() {
return getEjbqlString();
}
/**
* INTERNAL:
* Return the EJBQL string for this call
*/
public String getEjbqlString() {
return ejbqlString;
}
/**
* INTERNAL
* Return the isParsed state
*/
private boolean getIsParsed() {
return isParsed;
}
/**
* Back reference to query, unfortunately required for events.
*/
public DatabaseQuery getQuery() {
return query;
}
/**
* INTERNAL:
* Return the SQL string for this call. Always return null
* since this is an EJBQL call
*/
public String getLogString(Accessor accessor) {
return getSQLString();
}
/**
* INTERNAL:
* Return the SQL string for this call. Always return null
* since this is an EJBQL call
*/
public String getSQLString() {
return null;
}
/**
* INTERNAL:
* Yes this is an EJBQLCall
*/
public boolean isEJBQLCall() {
return true;
}
/**
* Return whether all the results of the call have been returned.
*/
public boolean isFinished() {
//never used, but required for implementing Call.
return true;
}
/**
* INTERNAL
* Is this query Parsed
*/
public boolean isParsed() {
return getIsParsed();
}
//bug4324564: removed parseEJBQLString to remove Antlr.jar compile dependency -CD
// See class oracle.toplink.essentials.internal.parsing.ejbql.EJBQLParserFactory.parseEJBQLString
/**
* Populate the query using the information retrieved from parsing the EJBQL.
*/
public void populateQuery(AbstractSession session) {
if (!isParsed()) {
//bug4324564: moved code to EJBQLParserFactory.populateQuery -CD
(new EJBQLParserFactory()).populateQuery(getEjbqlString(), (ObjectLevelReadQuery)getQuery(), session);
// Make sure we don't parse and prepare again.
this.setIsParsed(true);
}
}
/**
* INTERNAL:
* Prepare the JDBC statement, this may be parameterize or a call statement.
* If caching statements this must check for the pre-prepared statement and re-bind to it.
*/
public PreparedStatement prepareStatement(DatabaseAccessor accessor, AbstractRecord translationRow, AbstractSession session) throws SQLException {
return null;
}
/**
* INTERNAL:
* Set the EJBQL string for this call
*/
public void setEjbqlString(java.lang.String newEjbqlString) {
ejbqlString = newEjbqlString;
}
/**
* INTERNAL
* Set the isParsed state
*/
public void setIsParsed(boolean newIsParsed) {
isParsed = newIsParsed;
}
/**
* INTERNAL:
* Back reference to query, unfortunately required for events.
*/
public void setQuery(DatabaseQuery query) {
this.query = query;
}
/**
* INTERNAL:
* translate method comment.
*/
public void translate(AbstractRecord translationRow, AbstractRecord modifyRow, AbstractSession session) {
}
}
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