/*******************************************************************************
* Copyright (c) 1998, 2009 Oracle. All rights reserved.
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0
* which accompanies this distribution.
* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
* and the Eclipse Distribution License is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* Contributors:
* Oracle - initial API and implementation from Oracle TopLink
******************************************************************************/
package org.eclipse.persistence.platform.database;
import java.io.*;
import java.util.*;
import org.eclipse.persistence.exceptions.ValidationException;
import org.eclipse.persistence.expressions.*;
import org.eclipse.persistence.internal.databaseaccess.FieldTypeDefinition;
import org.eclipse.persistence.internal.sessions.AbstractSession;
import org.eclipse.persistence.queries.ValueReadQuery;
import org.eclipse.persistence.tools.schemaframework.FieldDefinition;
/**
* <p><b>Purpose</b>: Provides Microsoft Access specific behavior.
*
* @since TOPLink/Java 1.0
*/
public class AccessPlatform extends org.eclipse.persistence.platform.database.DatabasePlatform {
protected Map<String, Class> buildClassTypes() {
Map<String, Class> classTypeMapping = super.buildClassTypes();
// In access LONG means numeric not CLOB like in Oracle
classTypeMapping.put("LONG", Long.class);
classTypeMapping.put("TEXT", String.class);
return classTypeMapping;
}
protected Hashtable buildFieldTypes() {
Hashtable fieldTypeMapping;
fieldTypeMapping = new Hashtable();
fieldTypeMapping.put(Boolean.class, new FieldTypeDefinition("BIT", false));
fieldTypeMapping.put(Integer.class, new FieldTypeDefinition("LONG", false));
fieldTypeMapping.put(Long.class, new FieldTypeDefinition("DOUBLE", false));
fieldTypeMapping.put(Float.class, new FieldTypeDefinition("DOUBLE", false));
fieldTypeMapping.put(Double.class, new FieldTypeDefinition("DOUBLE", false));
fieldTypeMapping.put(Short.class, new FieldTypeDefinition("SHORT", false));
fieldTypeMapping.put(Byte.class, new FieldTypeDefinition("BYTE", false));
fieldTypeMapping.put(java.math.BigInteger.class, new FieldTypeDefinition("DOUBLE", false));
fieldTypeMapping.put(java.math.BigDecimal.class, new FieldTypeDefinition("DOUBLE", false));
fieldTypeMapping.put(Number.class, new FieldTypeDefinition("DOUBLE", false));
fieldTypeMapping.put(String.class, new FieldTypeDefinition("TEXT", 255));
fieldTypeMapping.put(Character.class, new FieldTypeDefinition("TEXT", 1));
fieldTypeMapping.put(Byte[].class, new FieldTypeDefinition("LONGBINARY", false));
fieldTypeMapping.put(Character[].class, new FieldTypeDefinition("MEMO", false));
fieldTypeMapping.put(byte[].class, new FieldTypeDefinition("LONGBINARY", false));
fieldTypeMapping.put(char[].class, new FieldTypeDefinition("MEMO", false));
fieldTypeMapping.put(java.sql.Blob.class, new FieldTypeDefinition("LONGBINARY", false));
fieldTypeMapping.put(java.sql.Clob.class, new FieldTypeDefinition("MEMO", false));
fieldTypeMapping.put(java.sql.Date.class, new FieldTypeDefinition("DATETIME", false));
fieldTypeMapping.put(java.sql.Time.class, new FieldTypeDefinition("DATETIME", false));
fieldTypeMapping.put(java.sql.Timestamp.class, new FieldTypeDefinition("DATETIME", false));
return fieldTypeMapping;
}
/**
* INTERNAL:
* returns the maximum number of characters that can be used in a field
* name on this platform.
*/
public int getMaxFieldNameSize() {
return 64;
}
/**
* Access do not support millisecond well, truncate the millisecond from the timestamp
*/
public java.sql.Timestamp getTimestampFromServer(AbstractSession session, String sessionName) {
if (getTimestampQuery() == null) {
java.sql.Timestamp currentTime = new java.sql.Timestamp(System.currentTimeMillis());
currentTime.setNanos(0);
return currentTime;
} else {
getTimestampQuery().setSessionName(sessionName);
return (java.sql.Timestamp)session.executeQuery(getTimestampQuery());
}
}
/**
* Initialize any platform-specific operators
*/
protected void initializePlatformOperators() {
super.initializePlatformOperators();
addOperator(ExpressionOperator.simpleFunction(ExpressionOperator.ToUpperCase, "UCASE"));
addOperator(ExpressionOperator.simpleFunction(ExpressionOperator.ToLowerCase, "LCASE"));
}
public boolean isAccess() {
return true;
}
/**
* Builds a table of maximum 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 maximums 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, new Long(Long.MAX_VALUE));
values.put(Double.class, new Double(Double.MAX_VALUE));
values.put(Short.class, new Short(Short.MAX_VALUE));
values.put(Byte.class, new Byte(Byte.MAX_VALUE));
values.put(Float.class, new Float(123456789));
values.put(java.math.BigInteger.class, new java.math.BigInteger("999999999999999"));
values.put(java.math.BigDecimal.class, new java.math.BigDecimal("99999999999999999999.9999999999999999999"));
return values;
}
/**
* 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, new Long(Long.MIN_VALUE));
values.put(Double.class, new Double(Double.MIN_VALUE));
values.put(Short.class, new Short(Short.MIN_VALUE));
values.put(Byte.class, new Byte(Byte.MIN_VALUE));
values.put(Float.class, new Float(-123456789));
values.put(java.math.BigInteger.class, new java.math.BigInteger("-999999999999999"));
values.put(java.math.BigDecimal.class, new java.math.BigDecimal("-9999999999999999999.9999999999999999999"));
return values;
}
/**
* Append the receiver's field 'NOT NULL' constraint clause to a writer.
*/
public void printFieldNotNullClause(Writer writer) {
// Do nothing
}
/**
* This is used as some databases create the primary key constraint differently, i.e. Access.
*/
public boolean requiresNamedPrimaryKeyConstraints() {
return true;
}
/**
* JDBC defines and outer join syntax, many drivers do not support this. So we normally avoid it.
*/
public boolean shouldUseJDBCOuterJoinSyntax() {
return false;
}
/**
* INTERNAL: Build the identity query for native sequencing.
*/
public ValueReadQuery buildSelectQueryForIdentity() {
ValueReadQuery selectQuery = new ValueReadQuery();
StringWriter writer = new StringWriter();
writer.write("SELECT @@IDENTITY");
selectQuery.setSQLString(writer.toString());
return selectQuery;
}
/** Append the receiver's field 'identity' constraint clause to a writer. */
public void printFieldIdentityClause(Writer writer) throws ValidationException {
try {
writer.write(" COUNTER");
} catch (IOException ioException) {
throw ValidationException.fileError(ioException);
}
}
/**
* INTERNAL: Indicates whether the platform supports identity. Sybase does
* through IDENTITY field types. This method is to be used *ONLY* by
* sequencing classes
*/
public boolean supportsIdentity() {
return true;
}
public void printFieldTypeSize(Writer writer, FieldDefinition field,FieldTypeDefinition fieldType, boolean shouldPrintFieldIdentityClause) throws IOException {
if (!shouldPrintFieldIdentityClause) {
super.printFieldTypeSize(writer, field, fieldType,
shouldPrintFieldIdentityClause);
}
}
public void printFieldUnique(Writer writer, boolean shouldPrintFieldIdentityClause) throws IOException {
if (!shouldPrintFieldIdentityClause) {
super.printFieldUnique(writer, shouldPrintFieldIdentityClause);
}
}
}