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package oracle.toplink.essentials.platform.database;
import java.io.*;
import java.util.*;
import oracle.toplink.essentials.internal.databaseaccess.*;
/**
* <p><b>Purpose</b>: Provides DBase specific behaviour.
* <p><b>Responsibilities</b>:<ul>
* <li> Writing Time & Timestamp as strings since they are not supported.
* </ul>
*
* @since TOPLink/Java 1.0
*/
public class DBasePlatform extends oracle.toplink.essentials.platform.database.DatabasePlatform {
protected Hashtable buildFieldTypes() {
Hashtable fieldTypeMapping;
fieldTypeMapping = new Hashtable();
fieldTypeMapping.put(Boolean.class, new FieldTypeDefinition("NUMBER", 1));
fieldTypeMapping.put(Integer.class, new FieldTypeDefinition("NUMBER", 11));
fieldTypeMapping.put(Long.class, new FieldTypeDefinition("NUMBER", 19));
fieldTypeMapping.put(Float.class, new FieldTypeDefinition("NUMBER", 12, 5).setLimits(19, 0, 19));
fieldTypeMapping.put(Double.class, new FieldTypeDefinition("NUMBER", 10, 5).setLimits(19, 0, 19));
fieldTypeMapping.put(Short.class, new FieldTypeDefinition("NUMBER", 6));
fieldTypeMapping.put(Byte.class, new FieldTypeDefinition("NUMBER", 4));
fieldTypeMapping.put(java.math.BigInteger.class, new FieldTypeDefinition("NUMBER", 19));
fieldTypeMapping.put(java.math.BigDecimal.class, new FieldTypeDefinition("NUMBER", 19).setLimits(19, 0, 9));
fieldTypeMapping.put(Number.class, new FieldTypeDefinition("NUMBER", 19).setLimits(19, 0, 9));
fieldTypeMapping.put(String.class, new FieldTypeDefinition("CHAR", 255));
fieldTypeMapping.put(Character.class, new FieldTypeDefinition("CHAR", 1));
fieldTypeMapping.put(Byte[].class, new FieldTypeDefinition("BINARY"));
fieldTypeMapping.put(Character[].class, new FieldTypeDefinition("MEMO"));
fieldTypeMapping.put(byte[].class, new FieldTypeDefinition("BINARY"));
fieldTypeMapping.put(char[].class, new FieldTypeDefinition("MEMO"));
fieldTypeMapping.put(java.sql.Blob.class, new FieldTypeDefinition("BINARY"));
fieldTypeMapping.put(java.sql.Clob.class, new FieldTypeDefinition("MEMO"));
fieldTypeMapping.put(java.sql.Date.class, new FieldTypeDefinition("DATE", false));
fieldTypeMapping.put(java.sql.Time.class, new FieldTypeDefinition("CHAR", 15));
fieldTypeMapping.put(java.sql.Timestamp.class, new FieldTypeDefinition("CHAR", 25));
return fieldTypeMapping;
}
/**
* INTERNAL:
* DBase does not support Time/Timestamp so we must map to strings.
* 2.0p22: protected->public INTERNAL
*/
public Object convertToDatabaseType(Object value) {
Object dbValue = super.convertToDatabaseType(value);
if ((dbValue instanceof java.sql.Time) || (dbValue instanceof java.sql.Timestamp)) {
return dbValue.toString();
}
return dbValue;
}
/**
* INTERNAL:
* returns the maximum number of characters that can be used in a field
* name on this platform.
*/
public int getMaxFieldNameSize() {
return 10;
}
/**
* INTERNAL:
*/
public String getSelectForUpdateString() {
return " FOR UPDATE OF *";
}
public boolean isDBase() {
return true;
}
/**
* INTERNAL:
* Builds a table of minimum numeric values keyed on java class. This is used for type testing but
* might also be useful to end users attempting to sanitize values.
* <p><b>NOTE</b>: BigInteger & BigDecimal minimums are dependent upon their precision & Scale
*/
public Hashtable maximumNumericValues() {
Hashtable values = new Hashtable();
values.put(Integer.class, new Integer(Integer.MAX_VALUE));
values.put(Long.class, Long.valueOf("922337203685478000"));
values.put(Double.class, new Double("99999999.999999999"));
values.put(Short.class, new Short(Short.MIN_VALUE));
values.put(Byte.class, new Byte(Byte.MIN_VALUE));
values.put(Float.class, new Float("99999999.999999999"));
values.put(java.math.BigInteger.class, new java.math.BigInteger("922337203685478000"));
values.put(java.math.BigDecimal.class, new java.math.BigDecimal("999999.999999999"));
return values;
}
/**
* INTERNAL:
* Builds a table of minimum numeric values keyed on java class. This is used for type testing but
* might also be useful to end users attempting to sanitize values.
* <p><b>NOTE</b>: BigInteger & BigDecimal minimums are dependent upon their precision & Scale
*/
public Hashtable minimumNumericValues() {
Hashtable values = new Hashtable();
values.put(Integer.class, new Integer(Integer.MIN_VALUE));
values.put(Long.class, Long.valueOf("-922337203685478000"));
values.put(Double.class, new Double("-99999999.999999999"));
values.put(Short.class, new Short(Short.MIN_VALUE));
values.put(Byte.class, new Byte(Byte.MIN_VALUE));
values.put(Float.class, new Float("-99999999.999999999"));
values.put(java.math.BigInteger.class, new java.math.BigInteger("-922337203685478000"));
values.put(java.math.BigDecimal.class, new java.math.BigDecimal("-999999.999999999"));
return values;
}
/**
* INTERNAL:
* Append the receiver's field 'NOT NULL' constraint clause to a writer.
*/
public void printFieldNotNullClause(Writer writer) {
// Do nothing
}
/**
* INTERNAL:
* JDBC defines and outer join syntax, many drivers do not support this. So we normally avoid it.
*/
public boolean shouldUseJDBCOuterJoinSyntax() {
return false;
}
/**
* INTERNAL:
*/
public boolean supportsForeignKeyConstraints() {
return false;
}
/**
* INTERNAL:
*/
public boolean supportsPrimaryKeyConstraint() {
return false;
}
}
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