oracle.toplink.essentials.internal.expressions.SQLModifyAllStatementForTempTable Maven / Gradle / Ivy
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package oracle.toplink.essentials.internal.expressions;
import java.io.*;
import java.util.Vector;
import java.util.Collection;
import oracle.toplink.essentials.exceptions.*;
import oracle.toplink.essentials.queryframework.*;
import oracle.toplink.essentials.internal.sessions.AbstractSession;
import oracle.toplink.essentials.internal.databaseaccess.DatabaseCall;
/**
* @author Andrei Ilitchev
* @since TOPLink/Java 1.0
*/
public abstract class SQLModifyAllStatementForTempTable extends SQLModifyStatement {
public static final int CREATE_TEMP_TABLE = 0;
public static final int INSERT_INTO_TEMP_TABLE = 1;
public static final int UPDATE_ORIGINAL_TABLE = 2;
public static final int CLEANUP_TEMP_TABLE = 3;
protected Collection allFields;
protected Collection primaryKeyFields;
protected SQLCall selectCall;
protected int mode;
abstract protected Collection getUsedFields();
abstract protected void writeUpdateOriginalTable(AbstractSession session, Writer writer) throws IOException;
public void setAllFields(Collection allFields) {
this.allFields = allFields;
}
public Collection getAllFields() {
return allFields;
}
public void setSelectCall(SQLCall selectCall) {
this.selectCall = selectCall;
}
public SQLCall getSelectCall() {
return selectCall;
}
public void setPrimaryKeyFields(Collection primaryKeyFields) {
this.primaryKeyFields = primaryKeyFields;
}
public Collection getPrimaryKeyFields() {
return primaryKeyFields;
}
public void setMode(int mode) {
this.mode = mode;
}
public int getMode() {
return mode;
}
/**
* Append the string containing the SQL insert string for the given table.
*/
public DatabaseCall buildCall(AbstractSession session) {
SQLCall call = new SQLCall();
call.returnNothing();
Writer writer = new CharArrayWriter(100);
try {
if(mode == CREATE_TEMP_TABLE) {
session.getPlatform().writeCreateTempTableSql(writer, table, session,
new Vector(getPrimaryKeyFields()),
getUsedFields(),
new Vector(getAllFields()));
} else if(mode == INSERT_INTO_TEMP_TABLE) {
session.getPlatform().writeInsertIntoTableSql(writer, table, getUsedFields());
call.getParameters().addAll(selectCall.getParameters());
call.getParameterTypes().addAll(selectCall.getParameterTypes());
String selectStr = selectCall.getSQLString();
writer.write(selectStr);
} else if(mode == UPDATE_ORIGINAL_TABLE) {
writeUpdateOriginalTable(session, writer);
} else if(mode == CLEANUP_TEMP_TABLE) {
session.getPlatform().writeCleanUpTempTableSql(writer, table);
} else {
// should never happen
}
call.setSQLString(writer.toString());
} catch (IOException exception) {
throw ValidationException.fileError(exception);
}
return call;
}
}