org.sqlite.SQLiteDataSource Maven / Gradle / Ivy
/*--------------------------------------------------------------------------
* Copyright 2010 Taro L. Saito
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*--------------------------------------------------------------------------*/
//--------------------------------------
// sqlite-jdbc Project
//
// SQLiteDataSource.java
// Since: Mar 11, 2010
//
// $URL$
// $Author$
//--------------------------------------
package org.sqlite;
import org.sqlite.SQLiteConfig.*;
import javax.sql.DataSource;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.SQLException;
import java.sql.SQLFeatureNotSupportedException;
import java.util.Properties;
import java.util.logging.Logger;
/**
* Provides {@link DataSource} API for configuring SQLite database connection
*
* @author leo
*
*/
public class SQLiteDataSource implements DataSource
{
private SQLiteConfig config;
private transient PrintWriter logger;
private int loginTimeout = 1;
private String url = JDBC.PREFIX; // use memory database in default
private String databaseName = ""; // the name of the current database
/**
* Default constructor.
*/
public SQLiteDataSource() {
this.config = new SQLiteConfig(); // default configuration
}
/**
* Creates a data source based on the provided configuration.
* @param config The configuration for the data source.
*/
public SQLiteDataSource(SQLiteConfig config) {
this.config = config;
}
/**
* Sets a data source's configuration.
* @param config The configuration.
*/
public void setConfig(SQLiteConfig config) {
this.config = config;
}
/**
* @return The configuration for the data source.
*/
public SQLiteConfig getConfig() {
return config;
}
/**
* Sets the location of the database file.
* @param url The location of the database file.
*/
public void setUrl(String url) {
this.url = url;
}
/**
* @return The location of the database file.
*/
public String getUrl() {
return url;
}
/**
* Sets the database name.
* @param databaseName The name of the database
*/
public void setDatabaseName(String databaseName) {
this.databaseName = databaseName;
}
/**
* @return The name of the database if one was set.
* @see SQLiteDataSource#setDatabaseName(String)
*/
public String getDatabaseName() {
return databaseName;
}
/**
* Enables or disables the sharing of the database cache and schema data
* structures between connections to the same database.
* @param enable True to enable; false to disable.
* @see http://www.sqlite.org/c3ref/enable_shared_cache.html
*/
public void setSharedCache(boolean enable) {
config.setSharedCache(enable);
}
/**
* Enables or disables extension loading.
* @param enable True to enable; false to disable.
* @see http://www.sqlite.org/c3ref/load_extension.html
*/
public void setLoadExtension(boolean enable) {
config.enableLoadExtension(enable);
}
/**
* Sets the database to be opened in read-only mode
* @param readOnly True to enable; false to disable.
* @see http://www.sqlite.org/c3ref/c_open_autoproxy.html
*/
public void setReadOnly(boolean readOnly) {
config.setReadOnly(readOnly);
}
/**
* Sets the suggested maximum number of database disk pages that SQLite will
* hold in memory at once per open database file.
* @param numberOfPages The number of database disk pages.
* @see http://www.sqlite.org/pragma.html#pragma_cache_size
*/
public void setCacheSize(int numberOfPages) {
config.setCacheSize(numberOfPages);
}
/**
* Enables or disables case sensitivity for the built-in LIKE operator.
* @param enable True to enable; false to disable.
* @see http://www.sqlite.org/compile.html#case_sensitive_like
*/
public void setCaseSensitiveLike(boolean enable) {
config.enableCaseSensitiveLike(enable);
}
/**
* Enables or disables the count-changes flag. When enabled INSERT, UPDATE
* and DELETE statements return the number of rows they modified.
* @param enable True to enable; false to disable.
* @see http://www.sqlite.org/pragma.html#pragma_count_changes
*/
public void setCountChanges(boolean enable) {
config.enableCountChanges(enable);
}
/**
* Sets the default maximum number of database disk pages that SQLite will
* hold in memory at once per open database file.
* @param numberOfPages The default suggested cache size.
* @see http://www.sqlite.org/pragma.html#pragma_cache_size
*/
public void setDefaultCacheSize(int numberOfPages) {
config.setDefaultCacheSize(numberOfPages);
}
/**
* Sets the text encoding used by the main database.
* @param encoding One of "UTF-8", "UTF-16le" (little-endian UTF-16)
* or "UTF-16be" (big-endian UTF-16).
* @see
* http://www.sqlite.org/pragma.html#pragma_encoding
*/
public void setEncoding(String encoding) {
config.setEncoding(Encoding.getEncoding(encoding));
}
/**
* Enables or disables the enforcement of foreign key constraints.
* @param enforce True to enable; false to disable.
* @see
* http://www.sqlite.org/pragma.html#pragma_foreign_keys
*/
public void setEnforceForeignKeys(boolean enforce) {
config.enforceForeignKeys(enforce);
}
/**
* Enables or disables the full_column_names flag. This flag together with
* the short_column_names flag determine the way SQLite assigns names to
* result columns of SELECT statements.
* @param enable True to enable; false to disable.
* @see http://www.sqlite.org/pragma.html#pragma_full_column_names
*/
public void setFullColumnNames(boolean enable) {
config.enableFullColumnNames(enable);
}
/**
* Enables or disables the fullfsync flag. This flag determines whether or
* not the F_FULLFSYNC syncing method is used on systems that support it.
* @param enable True to enable; false to disable.
* @see http://www.sqlite.org/pragma.html#pragma_fullfsync
*/
public void setFullSync(boolean enable) {
config.enableFullSync(enable);
}
/**
* Set the incremental_vacuum value that causes up to N pages to be removed
* from the
* http://www.sqlite.org/fileformat2.html#freelist.
* @param numberOfPagesToBeRemoved
* @see
* http://www.sqlite.org/pragma.html#pragma_incremental_vacuum
*/
public void setIncrementalVacuum(int numberOfPagesToBeRemoved) {
config.incrementalVacuum(numberOfPagesToBeRemoved);
}
/**
* Sets the journal mode for databases associated with the current database
* connection.
* @param mode One of DELETE, TRUNCATE, PERSIST, MEMORY, WAL or OFF.
* @see
* http://www.sqlite.org/pragma.html#pragma_journal_mode
*/
public void setJournalMode(String mode) {
config.setJournalMode(JournalMode.valueOf(mode));
}
/**
* Sets the limit of the size of rollback-journal and WAL files left in the
* file-system after transactions or checkpoints.
* @param limit The default journal size limit is -1 (no limit).
* @see
* http://www.sqlite.org/pragma.html#pragma_journal_size_limit
*/
public void setJournalSizeLimit(int limit) {
config.setJounalSizeLimit(limit);
}
/**
* Set the value of the legacy_file_format flag. When this flag is on, new
* databases are created in a file format that is readable and writable by
* all versions of SQLite going back to 3.0.0. When the flag is off, new
* databases are created using the latest file format which might not be
* readable or writable by versions of SQLite prior to 3.3.0.
* @param use True to turn on; false to turn off.
* @see http://www.sqlite.org/pragma.html#pragma_legacy_file_format
*/
public void setLegacyFileFormat(boolean use) {
config.useLegacyFileFormat(use);
}
/**
* Sets the database connection locking-mode.
* @param mode Either NORMAL or EXCLUSIVE.
* @see
* http://www.sqlite.org/pragma.html#pragma_locking_mode
*/
public void setLockingMode(String mode) {
config.setLockingMode(LockingMode.valueOf(mode));
}
/**
* Set the page size of the database.
* @param numBytes The page size must be a power of two between 512 and 65536 inclusive.
* @see
* http://www.sqlite.org/pragma.html#pragma_page_size
*/
public void setPageSize(int numBytes) {
config.setPageSize(numBytes);
}
/**
* Set the maximum number of pages in the database file.
* @param numPages The maximum page count cannot be reduced below the current database size.
* @see
* http://www.sqlite.org/pragma.html#pragma_max_page_count
*/
public void setMaxPageCount(int numPages) {
config.setMaxPageCount(numPages);
}
/**
* Set READ UNCOMMITTED isolation
* @param useReadUncommitedIsolationMode True to turn on; false to turn off.
* @see http://www.sqlite.org/pragma.html#pragma_read_uncommitted
*/
public void setReadUncommited(boolean useReadUncommitedIsolationMode) {
config.setReadUncommited(useReadUncommitedIsolationMode);
}
/**
* Enables or disables the recursive trigger capability. Changing the
* recursive_triggers setting affects the execution of all statements
* prepared using the database connection, including those prepared before
* the setting was changed.
* @param enable True to enable; fase to disable.
* @see http://www.sqlite.org/pragma.html#pragma_recursive_triggers
*/
public void setRecursiveTriggers(boolean enable) {
config.enableRecursiveTriggers(enable);
}
/**
* Enables or disables the reverse_unordered_selects flag. When enabled it
* causes SELECT statements without an ORDER BY clause to emit their results
* in the reverse order of what they normally would.
* @param enable True to enable; fase to disable.
* @see http://www.sqlite.org/pragma.html#pragma_reverse_unordered_selects
*/
public void setReverseUnorderedSelects(boolean enable) {
config.enableReverseUnorderedSelects(enable);
}
/**
* Enables or disables the short_column_names flag. This flag affects the
* way SQLite names columns of data returned by SELECT statements.
* @param enable True to enable; fase to disable.
* @see http://www.sqlite.org/pragma.html#pragma_short_column_names
* @see http://www.sqlite.org/pragma.html#pragma_fullfsync
*/
public void setShortColumnNames(boolean enable) {
config.enableShortColumnNames(enable);
}
/**
* Sets the setting of the "synchronous" flag.
* @param mode One of OFF, NORMAL or FULL;
* @see
* http://www.sqlite.org/pragma.html#pragma_synchronous
*/
public void setSynchronous(String mode) {
config.setSynchronous(SynchronousMode.valueOf(mode));
}
/**
* Set the temp_store type which is used to determine where temporary tables
* and indices are stored.
* @param storeType One of "DEFAULT", "FILE", "MEMORY"
* @see http://www.sqlite.org/pragma.html#pragma_temp_store
*/
public void setTempStore(String storeType) {
config.setTempStore(TempStore.valueOf(storeType));
}
/**
* Set the value of the sqlite3_temp_directory global variable, which many
* operating-system interface backends use to determine where to store
* temporary tables and indices.
* @param directoryName The temporary directory name.
* @see http://www.sqlite.org/pragma.html#pragma_temp_store_directory
*/
public void setTempStoreDirectory(String directoryName) {
config.setTempStoreDirectory(directoryName);
}
/**
* Sets the mode that will be used to start transactions for this database.
* @param transactionMode One of DEFERRED, IMMEDIATE or EXCLUSIVE.
* @see http://www.sqlite.org/lang_transaction.html
*/
public void setTransactionMode(String transactionMode) {
config.setTransactionMode(transactionMode);
}
/**
* Sets the value of the user-version. It is a big-endian 32-bit signed
* integer stored in the database header at offset 60.
* @param version
* @see http://www.sqlite.org/pragma.html#pragma_schema_version
*/
public void setUserVersion(int version) {
config.setUserVersion(version);
}
// codes for the DataSource interface
/**
* @see javax.sql.DataSource#getConnection()
*/
public Connection getConnection() throws SQLException {
return getConnection(null, null);
}
/**
* @see javax.sql.DataSource#getConnection(java.lang.String, java.lang.String)
*/
public SQLiteConnection getConnection(String username, String password) throws SQLException {
Properties p = config.toProperties();
if (username != null)
p.put("user", username);
if (password != null)
p.put("pass", password);
return JDBC.createConnection(url, p);
}
/**
* @see javax.sql.DataSource#getLogWriter()
*/
public PrintWriter getLogWriter() throws SQLException {
return logger;
}
/**
* @see javax.sql.DataSource#getLoginTimeout()
*/
public int getLoginTimeout() throws SQLException {
return loginTimeout;
}
public Logger getParentLogger() throws SQLFeatureNotSupportedException {
throw new SQLFeatureNotSupportedException("getParentLogger");
}
/**
* @see javax.sql.DataSource#setLogWriter(java.io.PrintWriter)
*/
public void setLogWriter(PrintWriter out) throws SQLException {
this.logger = out;
}
/**
* @see javax.sql.DataSource#setLoginTimeout(int)
*/
public void setLoginTimeout(int seconds) throws SQLException {
loginTimeout = seconds;
}
/**
* Determines if this object wraps a given class.
* @param iface The class to check.
* @return True if it is an instance of the current class; false otherwise.
* @throws SQLException
*/
public boolean isWrapperFor(Class< ? > iface) throws SQLException {
return iface.isInstance(this);
}
/**
* Casts this object to the given class.
* @param iface The class to cast to.
* @return The casted class.
* @throws SQLException
*/
@SuppressWarnings("unchecked")
public T unwrap(Class iface) throws SQLException {
return (T) this;
}
}