/*
* The contents of this file are subject to the terms
* of the Common Development and Distribution License
* (the "License"). You may not use this file except
* in compliance with the License.
*
* You can obtain a copy of the license at
* glassfish/bootstrap/legal/CDDLv1.0.txt or
* https://glassfish.dev.java.net/public/CDDLv1.0.html.
* See the License for the specific language governing
* permissions and limitations under the License.
*
* When distributing Covered Code, include this CDDL
* HEADER in each file and include the License file at
* glassfish/bootstrap/legal/CDDLv1.0.txt. If applicable,
* add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your
* own identifying information: Portions Copyright [yyyy]
* [name of copyright owner]
*/
// Copyright (c) 1998, 2005, Oracle. All rights reserved.
package oracle.toplink.essentials.tools.schemaframework;
import java.io.Writer;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Vector;
import oracle.toplink.essentials.exceptions.DatabaseException;
import oracle.toplink.essentials.exceptions.TopLinkException;
import oracle.toplink.essentials.exceptions.ValidationException;
import oracle.toplink.essentials.internal.databaseaccess.DatabaseAccessor;
import oracle.toplink.essentials.internal.sequencing.Sequencing;
import oracle.toplink.essentials.logging.SessionLog;
import oracle.toplink.essentials.internal.sessions.DatabaseSessionImpl;
import oracle.toplink.essentials.descriptors.ClassDescriptor;
import oracle.toplink.essentials.internal.sessions.AbstractSession;
import oracle.toplink.essentials.sequencing.DefaultSequence;
import oracle.toplink.essentials.sequencing.NativeSequence;
import oracle.toplink.essentials.sequencing.Sequence;
import oracle.toplink.essentials.sequencing.TableSequence;
/**
*
* Purpose: Define all user level protocol for development time database manipulation.
*
* Responsibilities:
*
* - Define protocol for schema creation.
*
- Define any useful testing specific protocol.
*
*/
public class SchemaManager {
protected DatabaseSessionImpl session;
protected Writer createSchemaWriter;
protected Writer dropSchemaWriter;
protected boolean createSQLFiles = true;
public SchemaManager(DatabaseSessionImpl session) {
this.session = session;
}
public SchemaManager(oracle.toplink.essentials.sessions.DatabaseSession session) {
this.session = ((DatabaseSessionImpl)session);
}
protected Writer getDropSchemaWriter() {
if(null == dropSchemaWriter)
return createSchemaWriter;
else
return dropSchemaWriter;
}
/**
* PUBLIC: If the schema manager is writing to a writer, append this string
* to that writer.
*/
public void appendToDDLWriter(String stringToWrite) {
// If this method is called, we know that it is the old case and
// it would not matter which schemaWriter we use as both the
// create and drop schemaWriters are essentially the same.
// So just pick one.
appendToDDLWriter(createSchemaWriter, stringToWrite);
}
public void appendToDDLWriter(Writer schemaWriter, String stringToWrite) {
if (schemaWriter == null) {
return; //do nothing. Ignore append request
}
try {
schemaWriter.write(stringToWrite);
schemaWriter.flush();
} catch (java.io.IOException ioException) {
throw ValidationException.fileError(ioException);
}
}
/**
* INTERNAL:
* builds the field names based on the type read in from the builder
*/
public void buildFieldTypes(TableDefinition tableDef) {
tableDef.buildFieldTypes(getSession());
}
/**
* PUBLIC:
* Close the schema writer.
*/
public void closeDDLWriter() {
closeDDLWriter(createSchemaWriter);
if(null != dropSchemaWriter)
closeDDLWriter(dropSchemaWriter);
}
public void closeDDLWriter(Writer schemaWriter) {
if (schemaWriter == null) {
return;
}
try {
schemaWriter.flush();
schemaWriter.close();
schemaWriter = null;
} catch (java.io.IOException ioException) {
throw ValidationException.fileError(ioException);
}
}
/**
* Use the table definition to add the constraints to the database, this is normally done
* in two steps to avoid dependencies.
*/
public void createConstraints(TableDefinition tableDefinition) throws TopLinkException {
if (shouldWriteToDatabase()) {
tableDefinition.createConstraintsOnDatabase(getSession());
} else {
tableDefinition.createConstraints(getSession(), createSchemaWriter);
}
}
/**
* Use the definition object to create the schema entity on the database.
* This is used for creating tables, views, procedures ... etc ...
*/
public void createObject(DatabaseObjectDefinition databaseObjectDefinition) throws TopLinkException {
if (shouldWriteToDatabase()) {
databaseObjectDefinition.createOnDatabase(getSession());
} else {
databaseObjectDefinition.createObject(getSession(), createSchemaWriter);
if(createSQLFiles)
this.appendToDDLWriter(createSchemaWriter,
getSession().getPlatform().getStoredProcedureTerminationToken());
this.appendToDDLWriter(createSchemaWriter, "\n");
}
}
/**
* Create all the receiver's sequences on the database for all of the loaded descriptors.
*/
public void createSequences() throws TopLinkException {
createOrReplaceSequences(true);
}
/**
* Drop and recreate all the receiver's sequences on the database for all of the loaded descriptors.
*/
public void replaceSequences() throws TopLinkException {
createOrReplaceSequences(false);
}
/**
* Common implementor for createSequence and replaceSequence
*/
protected void createOrReplaceSequences(boolean create) throws TopLinkException {
Sequencing sequencing = getSession().getSequencing();
if ((sequencing == null) || (sequencing.whenShouldAcquireValueForAll() == Sequencing.AFTER_INSERT)) {
// Not required on Sybase native etc.
return;
}
// Prepare table and sequence definitions
// table name mapped to TableDefinition
HashMap tableDefinitions = new HashMap();
// sequence name to SequenceDefinition
HashSet sequenceDefinitions = new HashSet();
// remember the processed - to handle each sequence just once.
HashSet processedSequenceNames = new HashSet();
Iterator descriptors = getSession().getDescriptors().values().iterator();
while (descriptors.hasNext()) {
ClassDescriptor descriptor = (ClassDescriptor)descriptors.next();
if (descriptor.usesSequenceNumbers()) {
String seqName = descriptor.getSequenceNumberName();
if (seqName == null) {
seqName = getSession().getDatasourcePlatform().getDefaultSequence().getName();
}
if (processedSequenceNames.contains(seqName)) {
continue;
}
processedSequenceNames.add(seqName);
Sequence sequence = getSession().getDatasourcePlatform().getSequence(seqName);
if (sequence.shouldAcquireValueAfterInsert()) {
continue;
}
SequenceDefinition sequenceDefinition = buildSequenceDefinition(sequence);
if (sequenceDefinition == null) {
continue;
}
sequenceDefinitions.add(sequenceDefinition);
TableDefinition tableDefinition = sequenceDefinition.buildTableDefinition();
if (tableDefinition != null) {
String tableName = tableDefinition.getName();
TableDefinition otherTableDefinition = (TableDefinition) tableDefinitions.get(tableName);
if (otherTableDefinition != null) {
// check for a conflict; if there is one - throw a ValidationException
} else {
tableDefinitions.put(tableName, tableDefinition);
}
}
}
}
// create tables
Iterator itTableDefinitions = tableDefinitions.values().iterator();
while (itTableDefinitions.hasNext()) {
TableDefinition tableDefinition = (TableDefinition) itTableDefinitions.next();
// CR 3870467, do not log stack
boolean shouldLogExceptionStackTrace = session.getSessionLog().shouldLogExceptionStackTrace();
if (shouldLogExceptionStackTrace) {
session.getSessionLog().setShouldLogExceptionStackTrace(false);
}
if (create) {
try {
createObject(tableDefinition);
} catch (DatabaseException exception) {
// Ignore already created
} finally {
if (shouldLogExceptionStackTrace) {
session.getSessionLog().setShouldLogExceptionStackTrace(true);
}
}
} else {
try {
dropObject(tableDefinition);
} catch (DatabaseException exception) {
// Ignore table not found for first creation
} finally {
if (shouldLogExceptionStackTrace) {
session.getSessionLog().setShouldLogExceptionStackTrace(true);
}
}
createObject(tableDefinition);
}
}
// create sequence objects
Iterator itSequenceDefinitions = sequenceDefinitions.iterator();
while (itSequenceDefinitions.hasNext()) {
SequenceDefinition sequenceDefinition = (SequenceDefinition) itSequenceDefinitions.next();
if (!create) {
try {
dropObject(sequenceDefinition);
} catch (DatabaseException exception) {
// Ignore sequence not found for first creation
}
}
createObject(sequenceDefinition);
}
}
protected SequenceDefinition buildSequenceDefinition(Sequence sequence) {
if (sequence instanceof DefaultSequence) {
String name = sequence.getName();
int size = sequence.getPreallocationSize();
sequence = getSession().getDatasourcePlatform().getDefaultSequence();
if (sequence instanceof TableSequence) {
TableSequence tableSequence = (TableSequence) sequence;
return new TableSequenceDefinition(name, tableSequence);
} else if (sequence instanceof NativeSequence) {
if (getSession().getDatasourcePlatform().isOracle()) {
return new OracleSequenceDefinition(name, size);
} else if (getSession().getDatasourcePlatform().isTimesTen()) {
return new TimesTenSequenceDefinition(name, size);
} else {
return null;
}
} else {
return null;
}
} else if (sequence instanceof TableSequence) {
TableSequence tableSequence = (TableSequence) sequence;
return new TableSequenceDefinition(tableSequence);
} else if (sequence instanceof NativeSequence) {
if (getSession().getDatasourcePlatform().isOracle()) {
NativeSequence nativeSequence = (NativeSequence) sequence;
return new OracleSequenceDefinition(nativeSequence);
} else {
return null;
}
} else {
return null;
}
}
/**
* Use the table definition to drop the constraints from the table, this is normally done
* in two steps to avoid dependencies.
*/
public void dropConstraints(TableDefinition tableDefinition) throws TopLinkException {
if (shouldWriteToDatabase()) {
tableDefinition.dropConstraintsOnDatabase(getSession());
} else {
tableDefinition.dropConstraints(getSession(), getDropSchemaWriter());
}
}
/**
* Use the definition object to drop the schema entity from the database.
* This is used for droping tables, views, procedures ... etc ...
*/
public void dropObject(DatabaseObjectDefinition databaseObjectDefinition) throws TopLinkException {
if (shouldWriteToDatabase()) {
databaseObjectDefinition.dropFromDatabase(getSession());
} else {
Writer dropSchemaWriter = getDropSchemaWriter();
databaseObjectDefinition.dropObject(getSession(), dropSchemaWriter);
if(createSQLFiles)
this.appendToDDLWriter(dropSchemaWriter,
getSession().getPlatform().getStoredProcedureTerminationToken());
this.appendToDDLWriter(dropSchemaWriter, "\n");
}
}
/**
* Drop (delete) the table named tableName from the database.
*/
public void dropTable(String tableName) throws TopLinkException {
TableDefinition tableDefinition;
tableDefinition = new TableDefinition();
tableDefinition.setName(tableName);
dropObject(tableDefinition);
}
/**
* INTERNAL:
* Close the schema writer when the schema manger is garbage collected
*/
public void finalize() {
try {
this.closeDDLWriter();
} catch (ValidationException exception) {
// do nothing
}
}
/**
* Return the appropriate accessor.
* Assume we are dealing with a JDBC accessor.
*/
protected DatabaseAccessor getAccessor() {
return (DatabaseAccessor) getSession().getAccessor();
}
/**
* Get a description of table columns available in a catalog.
*
* Each column description has the following columns:
*
* - TABLE_CAT String => table catalog (may be null)
*
- TABLE_SCHEM String => table schema (may be null)
*
- TABLE_NAME String => table name
*
- COLUMN_NAME String => column name
*
- DATA_TYPE short => SQL type from java.sql.Types
*
- TYPE_NAME String => Data source dependent type name
*
- COLUMN_SIZE int => column size. For char or date
* types this is the maximum number of characters, for numeric or
* decimal types this is precision.
*
- BUFFER_LENGTH is not used.
*
- DECIMAL_DIGITS int => the number of fractional digits
*
- NUM_PREC_RADIX int => Radix (typically either 10 or 2)
*
- NULLABLE int => is NULL allowed?
*
* - columnNoNulls - might not allow NULL values
*
- columnNullable - definitely allows NULL values
*
- columnNullableUnknown - nullability unknown
*
* - REMARKS String => comment describing column (may be null)
*
- COLUMN_DEF String => default value (may be null)
*
- SQL_DATA_TYPE int => unused
*
- SQL_DATETIME_SUB int => unused
*
- CHAR_OCTET_LENGTH int => for char types the
* maximum number of bytes in the column
*
- ORDINAL_POSITION int => index of column in table
* (starting at 1)
*
- IS_NULLABLE String => "NO" means column definitely
* does not allow NULL values; "YES" means the column might
* allow NULL values. An empty string means nobody knows.
*
*
* @param tableName a table name pattern
* @return a Vector of DatabaseRows.
*/
public Vector getAllColumnNames(String tableName) throws DatabaseException {
return getAccessor().getColumnInfo(null, null, tableName, null, getSession());
}
/**
* Get a description of table columns available in a catalog.
*
* Each column description has the following columns:
*
* - TABLE_CAT String => table catalog (may be null)
*
- TABLE_SCHEM String => table schema (may be null)
*
- TABLE_NAME String => table name
*
- COLUMN_NAME String => column name
*
- DATA_TYPE short => SQL type from java.sql.Types
*
- TYPE_NAME String => Data source dependent type name
*
- COLUMN_SIZE int => column size. For char or date
* types this is the maximum number of characters, for numeric or
* decimal types this is precision.
*
- BUFFER_LENGTH is not used.
*
- DECIMAL_DIGITS int => the number of fractional digits
*
- NUM_PREC_RADIX int => Radix (typically either 10 or 2)
*
- NULLABLE int => is NULL allowed?
*
* - columnNoNulls - might not allow NULL values
*
- columnNullable - definitely allows NULL values
*
- columnNullableUnknown - nullability unknown
*
* - REMARKS String => comment describing column (may be null)
*
- COLUMN_DEF String => default value (may be null)
*
- SQL_DATA_TYPE int => unused
*
- SQL_DATETIME_SUB int => unused
*
- CHAR_OCTET_LENGTH int => for char types the
* maximum number of bytes in the column
*
- ORDINAL_POSITION int => index of column in table
* (starting at 1)
*
- IS_NULLABLE String => "NO" means column definitely
* does not allow NULL values; "YES" means the column might
* allow NULL values. An empty string means nobody knows.
*
*
* @param creatorName a schema name pattern; "" retrieves those
* without a schema
* @param tableName a table name pattern
* @return a Vector of DatabaseRows.
*/
public Vector getAllColumnNames(String creatorName, String tableName) throws DatabaseException {
return getAccessor().getColumnInfo(null, creatorName, tableName, null, getSession());
}
/**
* Get a description of tables available in a catalog.
*
* Each table description has the following columns:
*
* - TABLE_CAT String => table catalog (may be null)
*
- TABLE_SCHEM String => table schema (may be null)
*
- TABLE_NAME String => table name
*
- TABLE_TYPE String => table type. Typical types are "TABLE",
* "VIEW", "SYSTEM TABLE", "GLOBAL TEMPORARY",
* "LOCAL TEMPORARY", "ALIAS", "SYNONYM".
*
- REMARKS String => explanatory comment on the table
*
*
* Note: Some databases may not return information for
* all tables.
*
* @return a Vector of DatabaseRows.
*/
public Vector getAllTableNames() throws DatabaseException {
return getAccessor().getTableInfo(null, null, null, null, getSession());
}
/**
* Get a description of table columns available in a catalog.
*
*
Each column description has the following columns:
*
* - TABLE_CAT String => table catalog (may be null)
*
- TABLE_SCHEM String => table schema (may be null)
*
- TABLE_NAME String => table name
*
- COLUMN_NAME String => column name
*
- DATA_TYPE short => SQL type from java.sql.Types
*
- TYPE_NAME String => Data source dependent type name
*
- COLUMN_SIZE int => column size. For char or date
* types this is the maximum number of characters, for numeric or
* decimal types this is precision.
*
- BUFFER_LENGTH is not used.
*
- DECIMAL_DIGITS int => the number of fractional digits
*
- NUM_PREC_RADIX int => Radix (typically either 10 or 2)
*
- NULLABLE int => is NULL allowed?
*
* - columnNoNulls - might not allow NULL values
*
- columnNullable - definitely allows NULL values
*
- columnNullableUnknown - nullability unknown
*
* - REMARKS String => comment describing column (may be null)
*
- COLUMN_DEF String => default value (may be null)
*
- SQL_DATA_TYPE int => unused
*
- SQL_DATETIME_SUB int => unused
*
- CHAR_OCTET_LENGTH int => for char types the
* maximum number of bytes in the column
*
- ORDINAL_POSITION int => index of column in table
* (starting at 1)
*
- IS_NULLABLE String => "NO" means column definitely
* does not allow NULL values; "YES" means the column might
* allow NULL values. An empty string means nobody knows.
*
*
* @param creatorName a schema name pattern; "" retrieves those
* without a schema
* @return a Vector of DatabaseRows.
*/
public Vector getAllTableNames(String creatorName) throws DatabaseException {
return getAccessor().getTableInfo(null, creatorName, null, null, getSession());
}
/**
* Get a description of table columns available in a catalog.
*
* Only column descriptions matching the catalog, schema, table
* and column name criteria are returned. They are ordered by
* TABLE_SCHEM, TABLE_NAME and ORDINAL_POSITION.
*
*
Each column description has the following columns:
*
* - TABLE_CAT String => table catalog (may be null)
*
- TABLE_SCHEM String => table schema (may be null)
*
- TABLE_NAME String => table name
*
- COLUMN_NAME String => column name
*
- DATA_TYPE short => SQL type from java.sql.Types
*
- TYPE_NAME String => Data source dependent type name
*
- COLUMN_SIZE int => column size. For char or date
* types this is the maximum number of characters, for numeric or
* decimal types this is precision.
*
- BUFFER_LENGTH is not used.
*
- DECIMAL_DIGITS int => the number of fractional digits
*
- NUM_PREC_RADIX int => Radix (typically either 10 or 2)
*
- NULLABLE int => is NULL allowed?
*
* - columnNoNulls - might not allow NULL values
*
- columnNullable - definitely allows NULL values
*
- columnNullableUnknown - nullability unknown
*
* - REMARKS String => comment describing column (may be null)
*
- COLUMN_DEF String => default value (may be null)
*
- SQL_DATA_TYPE int => unused
*
- SQL_DATETIME_SUB int => unused
*
- CHAR_OCTET_LENGTH int => for char types the
* maximum number of bytes in the column
*
- ORDINAL_POSITION int => index of column in table
* (starting at 1)
*
- IS_NULLABLE String => "NO" means column definitely
* does not allow NULL values; "YES" means the column might
* allow NULL values. An empty string means nobody knows.
*
*
* @param catalog a catalog name; "" retrieves those without a
* catalog; null means drop catalog name from the selection criteria
* @param schemaPattern a schema name pattern; "" retrieves those
* without a schema
* @param tableNamePattern a table name pattern
* @param columnNamePattern a column name pattern
* @return a Vector of DatabaseRows.
*/
public Vector getColumnInfo(String catalog, String schema, String tableName, String columnName) throws DatabaseException {
return getAccessor().getColumnInfo(catalog, schema, tableName, columnName, getSession());
}
public AbstractSession getSession() {
return session;
}
/**
* Get a description of tables available in a catalog.
*
* Only table descriptions matching the catalog, schema, table
* name and type criteria are returned. They are ordered by
* TABLE_TYPE, TABLE_SCHEM and TABLE_NAME.
*
*
Each table description has the following columns:
*
* - TABLE_CAT String => table catalog (may be null)
*
- TABLE_SCHEM String => table schema (may be null)
*
- TABLE_NAME String => table name
*
- TABLE_TYPE String => table type. Typical types are "TABLE",
* "VIEW", "SYSTEM TABLE", "GLOBAL TEMPORARY",
* "LOCAL TEMPORARY", "ALIAS", "SYNONYM".
*
- REMARKS String => explanatory comment on the table
*
*
* Note: Some databases may not return information for
* all tables.
*
* @param catalog a catalog name; "" retrieves those without a
* catalog; null means drop catalog name from the selection criteria
* @param schemaPattern a schema name pattern; "" retrieves those
* without a schema
* @param tableNamePattern a table name pattern
* @param types a list of table types to include; null returns all types
* @return a Vector of DatabaseRows.
*/
public Vector getTableInfo(String catalog, String schema, String tableName, String[] types) throws DatabaseException {
return getAccessor().getTableInfo(catalog, schema, tableName, types, getSession());
}
/**
* PUBLIC:
* Output all DDL statements directly to the database.
*/
public void outputDDLToDatabase() {
this.createSchemaWriter = null;
this.dropSchemaWriter = null;
}
/**
* PUBLIC:
* Output all DDL statements to a file writer specified by the name in the parameter.
*/
public void outputDDLToFile(String fileName) {
try {
this.createSchemaWriter = new java.io.FileWriter(fileName);
} catch (java.io.IOException ioException) {
throw ValidationException.fileError(ioException);
}
}
public void outputCreateDDLToFile(String fileName) {
try {
this.createSchemaWriter = new java.io.FileWriter(fileName);
} catch (java.io.IOException ioException) {
throw ValidationException.fileError(ioException);
}
}
public void outputDropDDLToFile(String fileName) {
try {
this.dropSchemaWriter = new java.io.FileWriter(fileName);
} catch (java.io.IOException ioException) {
throw ValidationException.fileError(ioException);
}
}
/**
* PUBLIC:
* Output all DDL statements to a writer specified in the parameter.
*/
public void outputDDLToWriter(Writer schemaWriter) {
this.createSchemaWriter = schemaWriter;
}
public void outputCreateDDLToWriter(Writer createWriter) {
this.createSchemaWriter = createWriter;
}
public void outputDropDDLToWriter(Writer dropWriter) {
this.dropSchemaWriter = dropWriter;
}
/**
* Use the definition object to drop and recreate the schema entity on the database.
* This is used for dropping tables, views, procedures ... etc ...
* This handles and ignore any database error while droping incase the object did not previously exist.
*/
public void replaceObject(DatabaseObjectDefinition databaseDefinition) throws TopLinkException {
// CR 3870467, do not log stack
boolean shouldLogExceptionStackTrace = getSession().getSessionLog().shouldLogExceptionStackTrace();
if (shouldLogExceptionStackTrace) {
getSession().getSessionLog().setShouldLogExceptionStackTrace(false);
}
try {
dropObject(databaseDefinition);
} catch (DatabaseException exception) {
// Ignore error
} finally {
if (shouldLogExceptionStackTrace) {
getSession().getSessionLog().setShouldLogExceptionStackTrace(true);
}
}
createObject(databaseDefinition);
}
/**
* Create the default table schema for the TopLink project this session associated with.
*/
public void createDefaultTables() {
//Create each table w/o throwing exception and/or exit if some of them are already existed in the db.
//If a table is already existed, skip the creation.
Iterator tblDefIter = new DefaultTableGenerator(session.getProject()).generateDefaultTableCreator().getTableDefinitions().iterator();
while (tblDefIter.hasNext()) {
TableDefinition tblDef = (TableDefinition) tblDefIter.next();
boolean shouldLogExceptionStackTrace = getSession().getSessionLog().shouldLogExceptionStackTrace();
getSession().getSessionLog().setShouldLogExceptionStackTrace(false);
try {
createObject(tblDef);
session.getSessionLog().log(SessionLog.FINEST, "default_tables_created", tblDef.getFullName());
} catch (DatabaseException exception) {
// Ignore the exception, table already created
session.getSessionLog().log(SessionLog.FINEST, "default_tables_already_existed", tblDef.getFullName());
} finally {
getSession().getSessionLog().setShouldLogExceptionStackTrace(shouldLogExceptionStackTrace);
}
}
//create sequence table
createSequences();
}
/**
* Drop and recreate the default table schema for the TopLink project this session associated with.
*/
public void replaceDefaultTables() throws TopLinkException {
boolean shouldLogExceptionStackTrace = getSession().getSessionLog().shouldLogExceptionStackTrace();
getSession().getSessionLog().setShouldLogExceptionStackTrace(false);
try {
DefaultTableGenerator gen = new DefaultTableGenerator(session.getProject());
gen.generateDefaultTableCreator().replaceTables(session, this);
} catch (DatabaseException exception) {
// Ignore error
} finally {
getSession().getSessionLog().setShouldLogExceptionStackTrace(shouldLogExceptionStackTrace);
}
}
public void setSession(DatabaseSessionImpl session) {
this.session = session;
}
/**
* PUBLIC:
* Return true if this SchemaManager should write to the database directly
*/
public boolean shouldWriteToDatabase() {
return (this.createSchemaWriter == null && this.dropSchemaWriter == null);
}
/**
* Use the definition to alter sequence.
*/
public void alterSequence(SequenceDefinition sequenceDefinition) throws TopLinkException {
if (!sequenceDefinition.isAlterSupported()) {
return;
}
if (shouldWriteToDatabase()) {
sequenceDefinition.alterOnDatabase(getSession());
} else {
sequenceDefinition.alter(getSession(), createSchemaWriter);
}
}
public void shouldCreateSQLFiles(boolean genFlag) {
this.createSQLFiles = genFlag;
}
}