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package oracle.toplink.essentials.platform.database;
import java.io.*;
import java.util.Calendar;
import java.util.Hashtable;
import java.util.Vector;
import oracle.toplink.essentials.expressions.ExpressionOperator;
import oracle.toplink.essentials.internal.databaseaccess.FieldTypeDefinition;
import oracle.toplink.essentials.internal.expressions.RelationExpression;
import oracle.toplink.essentials.internal.helper.Helper;
import oracle.toplink.essentials.queryframework.ValueReadQuery;
public class TimesTenPlatform extends DatabasePlatform {
//supportsForeignKeyConstraints is settable because TimesTen does not support circular referencing/self referencing
private boolean supportsForeignKeyConstraints;
public TimesTenPlatform() {
supportsForeignKeyConstraints = true;
}
/**
* If using native SQL then print a byte[] literally as a hex string otherwise use ODBC format
* as provided in DatabasePlatform.
*/
protected void appendByteArray(byte[] bytes, Writer writer) throws IOException {
if (usesNativeSQL()) {
writer.write("Ox");
Helper.writeHexString(bytes, writer);
} else {
super.appendByteArray(bytes, writer);
}
}
/**
* Appends an MySQL specific date if usesNativeSQL is true otherwise use the ODBC format.
* Native FORMAT: 'YYYY-MM-DD'
*/
protected void appendDate(java.sql.Date date, Writer writer) throws IOException {
if (usesNativeSQL()) {
writer.write("DATE '");
writer.write(Helper.printDate(date));
writer.write("'");
} else {
super.appendDate(date, writer);
}
}
/**
* Appends an MySQL specific time if usesNativeSQL is true otherwise use the ODBC format.
* Native FORMAT: 'HH:MM:SS'.
*/
protected void appendTime(java.sql.Time time, Writer writer) throws IOException {
if (usesNativeSQL()) {
writer.write("TIME '");
writer.write(Helper.printTime(time));
writer.write("'");
} else {
super.appendTime(time, writer);
}
}
/**
* Appends an MySQL specific Timestamp, if usesNativeSQL is true otherwise use the ODBC format.
* Native Format: 'YYYY-MM-DD HH:MM:SS'
*/
protected void appendTimestamp(java.sql.Timestamp timestamp, Writer writer) throws IOException {
if (usesNativeSQL()) {
writer.write("TIMESTAMP '");
writer.write(Helper.printTimestampWithoutNanos(timestamp));
writer.write("'");
} else {
super.appendTimestamp(timestamp, writer);
}
}
/**
* Appends an MySQL specific Timestamp, if usesNativeSQL is true otherwise use the ODBC format.
* Native Format: 'YYYY-MM-DD HH:MM:SS'
*/
protected void appendCalendar(Calendar calendar, Writer writer) throws IOException {
if (usesNativeSQL()) {
writer.write("TIMESTAMP '");
writer.write(Helper.printCalendarWithoutNanos(calendar));
writer.write("'");
} else {
super.appendCalendar(calendar, writer);
}
}
/**
* Return the mapping of class types to database types for the schema framework.
*/
protected Hashtable buildFieldTypes() {
Hashtable fieldTypeMapping;
fieldTypeMapping = new Hashtable();
fieldTypeMapping.put(Boolean.class, new FieldTypeDefinition("TINYINT", false));
fieldTypeMapping.put(Integer.class, new FieldTypeDefinition("INTEGER", false));
fieldTypeMapping.put(Long.class, new FieldTypeDefinition("BIGINT", false));
fieldTypeMapping.put(Float.class, new FieldTypeDefinition("FLOAT", false));
fieldTypeMapping.put(Double.class, new FieldTypeDefinition("DOUBLE", false));
fieldTypeMapping.put(Short.class, new FieldTypeDefinition("SMALLINT", false));
fieldTypeMapping.put(Byte.class, new FieldTypeDefinition("TINYINT", false));
fieldTypeMapping.put(java.math.BigInteger.class, new FieldTypeDefinition("BIGINT", false));
fieldTypeMapping.put(java.math.BigDecimal.class, new FieldTypeDefinition("DECIMAL(38)", false));
fieldTypeMapping.put(Number.class, new FieldTypeDefinition("DECIMAL(38)", false));
fieldTypeMapping.put(String.class, new FieldTypeDefinition("VARCHAR", 255));
fieldTypeMapping.put(Character.class, new FieldTypeDefinition("CHAR", 1));
fieldTypeMapping.put(Byte[].class, new FieldTypeDefinition("VARBINARY", 64000));
fieldTypeMapping.put(Character[].class, new FieldTypeDefinition("VARCHAR", 64000));
fieldTypeMapping.put(byte[].class, new FieldTypeDefinition("VARBINARY", 64000));
fieldTypeMapping.put(char[].class, new FieldTypeDefinition("VARCHAR", 64000));
fieldTypeMapping.put(java.sql.Blob.class, new FieldTypeDefinition("VARBINARY", 64000));
fieldTypeMapping.put(java.sql.Clob.class, new FieldTypeDefinition("VARCHAR", 64000));
fieldTypeMapping.put(java.sql.Date.class, new FieldTypeDefinition("DATE", false));
fieldTypeMapping.put(java.sql.Time.class, new FieldTypeDefinition("TIME", false));
fieldTypeMapping.put(java.sql.Timestamp.class, new FieldTypeDefinition("TIMESTAMP", false));
return fieldTypeMapping;
}
/**
* INTERNAL:
* Produce a DataReadQuery which updates(!) the sequence number in the db
* and returns it.
* @param sequenceName Name known by TimesTen to be a defined sequence
*/
public ValueReadQuery buildSelectQueryForSequenceObject(String seqName, Integer size) {
return new ValueReadQuery("SELECT " + getQualifiedSequenceName(seqName) + ".NEXTVAL FROM DUAL");
}
/**
* INTERNAL:
* Used for view creation.
*/
public String getCreateViewString() {
return "CREATE MATERIALIZED VIEW ";
}
/**
* Prepend sequence name with table qualifier (if any)
*/
protected String getQualifiedSequenceName(String seqName) {
if (getTableQualifier().equals("")) {
return seqName;
} else {
return getTableQualifier() + "." + seqName;
}
}
/**
* INTERNAL:
* Used for pessimistic locking.
*/
public String getSelectForUpdateString() {
return " FOR UPDATE";
}
/**
* PUBLIC:
* This method returns the query to select the timestamp
* from the server for TimesTen.
*/
public ValueReadQuery getTimestampQuery() {
if (timestampQuery == null) {
timestampQuery = new ValueReadQuery();
timestampQuery.setSQLString("SELECT SYSDATE FROM DUAL");
}
return timestampQuery;
}
/**
* Initialize any platform-specific operators
*/
protected void initializePlatformOperators() {
super.initializePlatformOperators();
addOperator(ExpressionOperator.simpleTwoArgumentFunction(ExpressionOperator.Concat, "CONCAT"));
addOperator(operatorOuterJoin());
addOperator(ExpressionOperator.ifNull());
}
/**
* Answers whether platform is TimesTen
*/
public boolean isTimesTen() {
return true;
}
/**
* Create the outer join operator for this platform
*/
protected ExpressionOperator operatorOuterJoin() {
ExpressionOperator result = new ExpressionOperator();
result.setSelector(ExpressionOperator.EqualOuterJoin);
Vector v = new Vector(2);
v.addElement(" (+) = ");
result.printsAs(v);
result.bePostfix();
result.setNodeClass(RelationExpression.class);
return result;
}
/**
* Some database require outer joins to be given in the where clause, others require it in the from clause.
*/
public boolean shouldPrintOuterJoinInWhereClause() {
return true;
}
/**
* INTERNAL:
* Indicates whether the platform supports sequence objects.
* This method is to be used *ONLY* by sequencing classes
*/
public boolean supportsSequenceObjects() {
return true;
}
public boolean supportsForeignKeyConstraints() {
return supportsForeignKeyConstraints;
}
public void setSupportsForeignKeyConstraints(boolean supportsForeignKeyConstraints) {
this.supportsForeignKeyConstraints = supportsForeignKeyConstraints;
}
/**
* INTERNAL:
* Override this method if the platform supports sequence objects.
* Returns sql used to create sequence object in the database.
*/
public Writer buildSequenceObjectCreationWriter(Writer writer, String fullSeqName, int increment, int start) throws IOException {
writer.write("CREATE SEQUENCE ");
writer.write(fullSeqName);
if (increment != 1) {
writer.write(" INCREMENT BY " + increment);
}
writer.write(" START WITH " + start);
return writer;
}
/**
* INTERNAL:
* Override this method if the platform supports sequence objects.
* Returns sql used to delete sequence object from the database.
*/
public Writer buildSequenceObjectDeletionWriter(Writer writer, String fullSeqName) throws IOException {
writer.write("DROP SEQUENCE ");
writer.write(fullSeqName);
return writer;
}
}
