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/*
* Firebird Open Source JavaEE Connector - JDBC Driver
*
* Distributable under LGPL license.
* You may obtain a copy of the License at http://www.gnu.org/copyleft/lgpl.html
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* LGPL License for more details.
*
* This file was created by members of the firebird development team.
* All individual contributions remain the Copyright (C) of those
* individuals. Contributors to this file are either listed here or
* can be obtained from a source control history command.
*
* All rights reserved.
*/
package org.firebirdsql.jdbc;
import org.firebirdsql.gds.DatabaseParameterBuffer;
import org.firebirdsql.gds.JaybirdErrorCodes;
import org.firebirdsql.gds.impl.DatabaseParameterBufferExtension;
import org.firebirdsql.gds.impl.GDSHelper;
import org.firebirdsql.gds.ng.*;
import org.firebirdsql.gds.ng.fields.RowValue;
import org.firebirdsql.gds.ng.listeners.StatementListener;
import org.firebirdsql.jdbc.escape.FBEscapedParser;
import org.firebirdsql.jdbc.escape.FBEscapedParser.EscapeParserMode;
import org.firebirdsql.logging.LoggerFactory;
import java.sql.*;
import java.util.*;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.regex.Pattern;
import static org.firebirdsql.util.FirebirdSupportInfo.supportInfoFor;
/**
* The object used for executing a static SQL statement and obtaining the results produced by it.
*
* Only one ResultSet object per Statement object
* can be open at any point in
* time. Therefore, if the reading of one ResultSet object is interleaved
* with the reading of another, each must have been generated by
* different Statement objects. All statement execute
* methods implicitly close a statement's current ResultSet object
* if an open one exists.
*
*
* @see Connection#createStatement
* @see ResultSet
*
* @author David Jencks
* @author Mark Rotteveel
*/
public class FBStatement implements FirebirdStatement, Synchronizable {
private static final org.firebirdsql.logging.Logger log = LoggerFactory.getLogger(FBStatement.class);
protected static final JdbcVersionSupport jdbcVersionSupport =
JdbcVersionSupportHolder.INSTANCE.getJdbcVersionSupport();
private static final AtomicInteger STATEMENT_ID_GENERATOR = new AtomicInteger();
private final int localStatementId = STATEMENT_ID_GENERATOR.incrementAndGet();
protected final GDSHelper gdsHelper;
private final Object syncObject;
protected final FBObjectListener.StatementListener statementListener;
protected FbStatement fbStatement;
//The normally retrieved result set. (no autocommit, not a cached rs).
private FBResultSet currentRs;
private SqlCountHolder sqlCountHolder;
private boolean closed;
protected boolean completed = true;
private boolean escapedProcessing = true;
private volatile boolean closeOnCompletion;
private boolean currentStatementGeneratedKeys;
protected SQLWarning firstWarning;
protected StatementResult currentStatementResult = StatementResult.NO_MORE_RESULTS;
// Singleton result indicates it is a stored procedure or [INSERT | UPDATE | DELETE] ... RETURNING ...
protected boolean isSingletonResult;
// Used for singleton or batch results for getGeneratedKeys, and singleton results of stored procedures
protected final List specialResult = new LinkedList<>();
protected int maxRows;
protected int fetchSize;
private int maxFieldSize;
private int queryTimeout;
private String cursorName;
private final int rsConcurrency;
private final int rsType;
private final int rsHoldability;
private int fetchDirection = ResultSet.FETCH_FORWARD;
private final FBObjectListener.ResultSetListener resultSetListener = new RSListener();
protected final FBConnection connection;
/**
* Listener for the result sets.
*/
private class RSListener implements FBObjectListener.ResultSetListener {
/**
* Notify that result set was closed. This method cleans the result
* set reference, so that call to {@link #close()} method will not cause
* exception.
*
* @param rs result set that was closed.
*/
@Override
public void resultSetClosed(ResultSet rs) throws SQLException {
currentRs = null;
// notify listener that statement is completed.
notifyStatementCompleted();
if (closeOnCompletion) {
close();
}
}
@Override
public void allRowsFetched(ResultSet rs) throws SQLException {
/*
* According to the JDBC 3.0 specification (p.62) the result set
* is closed in the autocommit mode if one of the following occurs:
*
* - all of the rows have been retrieved
* - the associated Statement object is re-executed
* - another Statement object is executed on the same connection
*/
// according to the specification we close the result set and
// generate the "resultSetClosed" event, that in turn generates
// the "statementCompleted" event
if (connection != null && connection.getAutoCommit())
rs.close();
}
@Override
public void executionCompleted(FirebirdRowUpdater updater, boolean success) throws SQLException {
notifyStatementCompleted(success);
}
@Override
public void executionStarted(FirebirdRowUpdater updater) throws SQLException {
notifyStatementStarted(false);
}
}
protected FBStatement(GDSHelper c, int rsType, int rsConcurrency, int rsHoldability, FBObjectListener.StatementListener statementListener) throws SQLException {
this.gdsHelper = c;
syncObject = c.getSynchronizationObject();
this.rsConcurrency = rsConcurrency;
this.rsType = rsType;
this.rsHoldability = rsHoldability;
this.statementListener = statementListener;
// TODO Find out if connection is actually ever null, because some parts of the code expect it not to be null
this.connection = statementListener != null ? statementListener.getConnection() : null;
closed = false;
}
String getCursorName() {
return cursorName;
}
private static Set INVALID_STATEMENT_STATES = EnumSet.of(
StatementState.ERROR, StatementState.CLOSING, StatementState.CLOSED);
public boolean isValid() {
return !closed && !INVALID_STATEMENT_STATES.contains(fbStatement.getState());
}
public final Object getSynchronizationObject() {
return syncObject;
}
@Override
protected void finalize() throws Throwable {
try {
if (!closed)
close();
} finally {
super.finalize();
}
}
public void completeStatement() throws SQLException {
completeStatement(CompletionReason.OTHER);
}
public void completeStatement(CompletionReason reason) throws SQLException {
if (currentRs != null && (reason != CompletionReason.COMMIT || currentRs.getHoldability() == ResultSet.CLOSE_CURSORS_AT_COMMIT)) {
closeResultSet(false, reason);
}
if (!completed)
notifyStatementCompleted();
}
/**
* Executes an SQL statement that returns a single ResultSet object.
*
* @param sql typically this is a static SQL SELECT statement
* @return a ResultSet object that contains the data produced by the
* given query; never null
* @exception SQLException if a database access error occurs
*/
public ResultSet executeQuery(String sql) throws SQLException {
checkValidity();
currentStatementGeneratedKeys = false;
synchronized(getSynchronizationObject()) {
notifyStatementStarted();
if (!internalExecute(sql)) {
throw new FBSQLException("Query did not return a result set.",
SQLStateConstants.SQL_STATE_NO_RESULT_SET);
}
return getResultSet();
}
}
protected void notifyStatementStarted() throws SQLException {
notifyStatementStarted(true);
}
protected void notifyStatementStarted(boolean closeResultSet) throws SQLException {
if (closeResultSet)
closeResultSet(false);
// notify listener that statement execution is about to start
statementListener.executionStarted(this);
if (fbStatement != null) {
fbStatement.setTransaction(gdsHelper.getCurrentTransaction());
}
completed = false;
}
protected void notifyStatementCompleted() throws SQLException {
notifyStatementCompleted(true);
}
protected void notifyStatementCompleted(boolean success) throws SQLException {
completed = true;
statementListener.statementCompleted(this, success);
}
/**
* Executes an SQL INSERT, UPDATE or
* DELETE statement. In addition,
* SQL statements that return nothing, such as SQL DDL statements,
* can be executed.
*
* @param sql an SQL INSERT, UPDATE or
* DELETE statement or an SQL statement that returns nothing
* @return either the row count for INSERT, UPDATE
* or DELETE statements, or 0 for SQL statements that return nothing
* @exception SQLException if a database access error occurs
*/
public int executeUpdate(String sql) throws SQLException {
checkValidity();
currentStatementGeneratedKeys = false;
synchronized (getSynchronizationObject()) {
notifyStatementStarted();
try {
if (internalExecute(sql)) { throw new FBSQLException(
"Update statement returned results."); }
return getUpdateCount();
} finally {
notifyStatementCompleted();
}
}
}
/**
* Executes the given SQL statement and signals the driver with the
* given flag about whether the
* auto-generated keys produced by this Statement object
* should be made available for retrieval. The driver will ignore the
* flag if the SQL statement
* is not an INSERT statement, or an SQL statement able to return
* auto-generated keys (the list of such statements is vendor-specific).
*
* @param sql an SQL Data Manipulation Language (DML) statement, such as INSERT, UPDATE or
* DELETE; or an SQL statement that returns nothing,
* such as a DDL statement.
*
* @param autoGeneratedKeys a flag indicating whether auto-generated keys
* should be made available for retrieval;
* one of the following constants:
* Statement.RETURN_GENERATED_KEYS
* Statement.NO_GENERATED_KEYS
* @return either (1) the row count for SQL Data Manipulation Language (DML) statements
* or (2) 0 for SQL statements that return nothing
*
* @exception SQLException if a database access error occurs,
* this method is called on a closed Statement, the given
* SQL statement returns a ResultSet object, or
* the given constant is not one of those allowed
* @exception SQLFeatureNotSupportedException if the JDBC driver does not support
* this method with a constant of Statement.RETURN_GENERATED_KEYS
* @since 1.4
*/
public int executeUpdate(String sql, int autoGeneratedKeys) throws SQLException {
execute(sql, autoGeneratedKeys);
return getUpdateCount();
}
/**
* Executes the given SQL statement and signals the driver that the
* auto-generated keys indicated in the given array should be made available
* for retrieval. This array contains the indexes of the columns in the
* target table that contain the auto-generated keys that should be made
* available. The driver will ignore the array if the SQL statement
* is not an INSERT statement, or an SQL statement able to return
* auto-generated keys (the list of such statements is vendor-specific).
*
* @param sql an SQL Data Manipulation Language (DML) statement, such as INSERT, UPDATE or
* DELETE; or an SQL statement that returns nothing,
* such as a DDL statement.
*
* @param columnIndexes an array of column indexes indicating the columns
* that should be returned from the inserted row
* @return either (1) the row count for SQL Data Manipulation Language (DML) statements
* or (2) 0 for SQL statements that return nothing
*
* @exception SQLException if a database access error occurs,
* this method is called on a closed Statement, the SQL
* statement returns a ResultSet object, or the
* second argument supplied to this method is not an int array
* whose elements are valid column indexes
* @throws SQLFeatureNotSupportedException if the JDBC driver does not support this method
* @since 1.4
*/
public int executeUpdate(String sql, int[] columnIndexes) throws SQLException {
execute(sql, columnIndexes);
return getUpdateCount();
}
/**
* Executes the given SQL statement and signals the driver that the
* auto-generated keys indicated in the given array should be made available
* for retrieval. This array contains the names of the columns in the
* target table that contain the auto-generated keys that should be made
* available. The driver will ignore the array if the SQL statement
* is not an INSERT statement, or an SQL statement able to return
* auto-generated keys (the list of such statements is vendor-specific).
*
* @param sql an SQL Data Manipulation Language (DML) statement, such as INSERT, UPDATE or
* DELETE; or an SQL statement that returns nothing,
* such as a DDL statement.
* @param columnNames an array of the names of the columns that should be
* returned from the inserted row
* @return either the row count for INSERT, UPDATE,
* or DELETE statements, or 0 for SQL statements
* that return nothing
* @exception SQLException if a database access error occurs,
* this method is called on a closed Statement, the SQL
* statement returns a ResultSet object, or the
* second argument supplied to this method is not a String array
* whose elements are valid column names
*
* @throws SQLFeatureNotSupportedException if the JDBC driver does not support this method
* @since 1.4
*/
public int executeUpdate(String sql, String[] columnNames) throws SQLException {
execute(sql, columnNames);
return getUpdateCount();
}
/**
* Executes the given SQL statement, which may return multiple results,
* and signals the driver that any
* auto-generated keys should be made available
* for retrieval. The driver will ignore this signal if the SQL statement
* is not an INSERT statement, or an SQL statement able to return
* auto-generated keys (the list of such statements is vendor-specific).
*
* In some (uncommon) situations, a single SQL statement may return
* multiple result sets and/or update counts. Normally you can ignore
* this unless you are (1) executing a stored procedure that you know may
* return multiple results or (2) you are dynamically executing an
* unknown SQL string.
*
* The execute method executes an SQL statement and indicates the
* form of the first result. You must then use the methods
* getResultSet or getUpdateCount
* to retrieve the result, and getMoreResults to
* move to any subsequent result(s).
*
* @param sql any SQL statement
* @param autoGeneratedKeys a constant indicating whether auto-generated
* keys should be made available for retrieval using the method
* getGeneratedKeys; one of the following constants:
* Statement.RETURN_GENERATED_KEYS or
* Statement.NO_GENERATED_KEYS
* @return true if the first result is a ResultSet
* object; false if it is an update count or there are
* no results
* @exception SQLException if a database access error occurs,
* this method is called on a closed Statement or the second
* parameter supplied to this method is not
* Statement.RETURN_GENERATED_KEYS or
* Statement.NO_GENERATED_KEYS.
* @exception SQLFeatureNotSupportedException if the JDBC driver does not support
* this method with a constant of Statement.RETURN_GENERATED_KEYS
* @see #getResultSet
* @see #getUpdateCount
* @see #getMoreResults
* @see #getGeneratedKeys
*
* @since 1.4
*/
public boolean execute(String sql, int autoGeneratedKeys) throws SQLException {
checkValidity();
if (autoGeneratedKeys == Statement.RETURN_GENERATED_KEYS) {
connection.checkAutoGeneratedKeysSupport();
}
AbstractGeneratedKeysQuery query = connection.new GeneratedKeysQuery(sql, autoGeneratedKeys);
return executeImpl(query);
}
/**
* Executes the given SQL statement, which may return multiple results,
* and signals the driver that the
* auto-generated keys indicated in the given array should be made available
* for retrieval. This array contains the indexes of the columns in the
* target table that contain the auto-generated keys that should be made
* available. The driver will ignore the array if the SQL statement
* is not an INSERT statement, or an SQL statement able to return
* auto-generated keys (the list of such statements is vendor-specific).
*
* Under some (uncommon) situations, a single SQL statement may return
* multiple result sets and/or update counts. Normally you can ignore
* this unless you are (1) executing a stored procedure that you know may
* return multiple results or (2) you are dynamically executing an
* unknown SQL string.
*
* The execute method executes an SQL statement and indicates the
* form of the first result. You must then use the methods
* getResultSet or getUpdateCount
* to retrieve the result, and getMoreResults to
* move to any subsequent result(s).
*
* @param sql any SQL statement
* @param columnIndexes an array of the indexes of the columns in the
* inserted row that should be made available for retrieval by a
* call to the method getGeneratedKeys
* @return true if the first result is a ResultSet
* object; false if it is an update count or there
* are no results
* @exception SQLException if a database access error occurs,
* this method is called on a closed Statement or the
* elements in the int array passed to this method
* are not valid column indexes
* @throws SQLFeatureNotSupportedException if the JDBC driver does not support this method
* @see #getResultSet
* @see #getUpdateCount
* @see #getMoreResults
*
* @since 1.4
*/
public boolean execute(String sql, int[] columnIndexes) throws SQLException {
checkValidity();
connection.checkAutoGeneratedKeysSupport();
AbstractGeneratedKeysQuery query = connection.new GeneratedKeysQuery(sql, columnIndexes);
return executeImpl(query);
}
/**
* Executes the given SQL statement, which may return multiple results,
* and signals the driver that the
* auto-generated keys indicated in the given array should be made available
* for retrieval. This array contains the names of the columns in the
* target table that contain the auto-generated keys that should be made
* available. The driver will ignore the array if the SQL statement
* is not an INSERT statement, or an SQL statement able to return
* auto-generated keys (the list of such statements is vendor-specific).
*
* In some (uncommon) situations, a single SQL statement may return
* multiple result sets and/or update counts. Normally you can ignore
* this unless you are (1) executing a stored procedure that you know may
* return multiple results or (2) you are dynamically executing an
* unknown SQL string.
*
* The execute method executes an SQL statement and indicates the
* form of the first result. You must then use the methods
* getResultSet or getUpdateCount
* to retrieve the result, and getMoreResults to
* move to any subsequent result(s).
*
* @param sql any SQL statement
* @param columnNames an array of the names of the columns in the inserted
* row that should be made available for retrieval by a call to the
* method getGeneratedKeys
* @return true if the next result is a ResultSet
* object; false if it is an update count or there
* are no more results
* @exception SQLException if a database access error occurs,
* this method is called on a closed Statement or the
* elements of the String array passed to this
* method are not valid column names
* @throws SQLFeatureNotSupportedException if the JDBC driver does not support this method
* @see #getResultSet
* @see #getUpdateCount
* @see #getMoreResults
* @see #getGeneratedKeys
*
* @since 1.4
*/
public boolean execute(String sql, String[] columnNames) throws SQLException {
checkValidity();
connection.checkAutoGeneratedKeysSupport();
AbstractGeneratedKeysQuery query = connection.new GeneratedKeysQuery(sql, columnNames);
return executeImpl(query);
}
/**
* Retrieves any auto-generated keys created as a result of executing this
* Statement object. If this Statement object did
* not generate any keys, an empty ResultSet
* object is returned.
*
*
Note:If the columns which represent the auto-generated keys were not specified,
* the JDBC driver implementation will determine the columns which best represent the auto-generated keys.
*
* @return a ResultSet object containing the auto-generated key(s)
* generated by the execution of this Statement object
* @exception SQLException if a database access error occurs or
* this method is called on a closed Statement
* @throws SQLFeatureNotSupportedException if the JDBC driver does not support this method
* @since 1.4
*/
public ResultSet getGeneratedKeys() throws SQLException {
checkValidity();
if (isGeneratedKeyQuery() && isSingletonResult) {
return new FBResultSet(fbStatement.getFieldDescriptor(), new ArrayList<>(specialResult),
resultSetListener);
}
return new FBResultSet(fbStatement.emptyRowDescriptor(), Collections.emptyList());
}
/**
* Releases this Statement object's database
* and JDBC resources immediately instead of waiting for
* this to happen when it is automatically closed.
* It is generally good practice to release resources as soon as
* you are finished with them to avoid tying up database
* resources.
*
* Calling the method close on a Statement
* object that is already closed has no effect.
*
Note: A Statement object is automatically closed when it is
* garbage collected. When a Statement object is closed, its current
* ResultSet object, if one exists, is also closed.
*
* @exception SQLException if a database access error occurs
*/
public void close() throws SQLException {
close(true);
}
void close(boolean ignoreAlreadyClosed) throws SQLException {
if (isClosed()) {
if (ignoreAlreadyClosed)
return;
throw new FBSQLException("This statement is already closed.");
}
synchronized(getSynchronizationObject()) {
if (fbStatement != null) {
try {
try {
closeResultSet(false);
} finally {
//may need ensureTransaction?
fbStatement.close();
}
} finally {
fbStatement = null;
}
}
}
closed = true;
statementListener.statementClosed(this);
}
/**
* Check if this statement was closed. This is quick workaround to avoid
* additional {@link #close()} in our cleanup code.
*
* @return true if this statement was already closed.
*/
public boolean isClosed() {
return closed;
}
/**
* Returns the maximum number of bytes allowed
* for any column value.
* This limit is the maximum number of bytes that can be
* returned for any column value.
* The limit applies only to BINARY,
* VARBINARY, LONGVARBINARY, CHAR, VARCHAR, and LONGVARCHAR
* columns. If the limit is exceeded, the excess data is silently
* discarded.
*
* @return the current max column size limit; zero means unlimited
* @exception SQLException if a database access error occurs
*/
public int getMaxFieldSize() throws SQLException {
return maxFieldSize;
}
/**
* Sets the limit for the maximum number of bytes in a column to
* the given number of bytes. This is the maximum number of bytes
* that can be returned for any column value. This limit applies
* only to BINARY, VARBINARY,
* LONGVARBINARY, CHAR, VARCHAR, and
* LONGVARCHAR fields. If the limit is exceeded, the excess data
* is silently discarded. For maximum portability, use values
* greater than 256.
*
* @param max the new max column size limit; zero means unlimited
* @exception SQLException if a database access error occurs
*/
public void setMaxFieldSize(int max) throws SQLException {
if (max < 0)
throw new FBSQLException("Can't set max field size negative",
SQLStateConstants.SQL_STATE_INVALID_ARG_VALUE);
else
maxFieldSize = max;
}
/**
* Retrieves the maximum number of rows that a
* ResultSet object can contain. If the limit is exceeded, the excess
* rows are silently dropped.
*
* @return the current max row limit; zero means unlimited
* @exception SQLException if a database access error occurs
*/
public int getMaxRows() throws SQLException {
return maxRows;
}
/**
* Sets the limit for the maximum number of rows that any
* ResultSet object can contain to the given number.
* If the limit is exceeded, the excess
* rows are silently dropped.
*
* @param max the new max rows limit; zero means unlimited
* @exception SQLException if a database access error occurs
*/
public void setMaxRows(int max) throws SQLException {
if (max < 0)
throw new FBSQLException("Max rows can't be less than 0", SQLStateConstants.SQL_STATE_INVALID_ARG_VALUE);
else
maxRows = max;
}
/**
* Sets escape processing on or off.
* If escape scanning is on (the default), the driver will do
* escape substitution before sending the SQL to the database.
*
* Note: Since prepared statements have usually been parsed prior
* to making this call, disabling escape processing for prepared
* statements will have no effect.
*
* @param enable true to enable; false to disable
* @exception SQLException if a database access error occurs
*/
public void setEscapeProcessing(boolean enable) throws SQLException {
escapedProcessing = enable;
}
/**
* Retrieves the number of seconds the driver will
* wait for a Statement object to execute. If the limit is exceeded, a
* SQLException is thrown.
*
* @return the current query timeout limit in seconds; zero means unlimited
* @exception SQLException if a database access error occurs
*/
public int getQueryTimeout() throws SQLException {
return queryTimeout;
}
/**
* Sets the number of seconds the driver will
* wait for a Statement object to execute to the given number of seconds.
* If the limit is exceeded, an SQLException is thrown.
*
* @param seconds the new query timeout limit in seconds; zero means
* unlimited
* @exception SQLException if a database access error occurs
*/
public void setQueryTimeout(int seconds) throws SQLException {
if (seconds < 0) {
throw new FBSQLException("Can't set query timeout negative", SQLStateConstants.SQL_STATE_INVALID_ARG_VALUE);
}
queryTimeout = seconds;
}
public void cancel() throws SQLException {
checkValidity();
if (!supportInfoFor(connection).supportsCancelOperation()) {
throw new SQLFeatureNotSupportedException("Cancel not supported");
}
// TODO This may be problematic, as it could also cancel something other than this statement
gdsHelper.cancelOperation();
}
/**
* Retrieves the first warning reported by calls on this Statement object.
* Subsequent Statement object warnings will be chained to this
* SQLWarning object.
*
*
The warning chain is automatically cleared each time
* a statement is (re)executed.
*
*
Note: If you are processing a ResultSet object, any
* warnings associated with reads on that ResultSet object
* will be chained on it.
*
* @return the first SQLWarning object or null
* @exception SQLException if a database access error occurs
*/
public SQLWarning getWarnings() throws SQLException {
return firstWarning;
}
/**
* Clears all the warnings reported on this Statement
* object. After a call to this method,
* the method getWarnings will return
* null until a new warning is reported for this
* Statement object.
*
* @exception SQLException if a database access error occurs
*/
public void clearWarnings() throws SQLException {
firstWarning = null;
}
/**
* Defines the SQL cursor name that will be used by
* subsequent Statement object execute methods.
* This name can then be
* used in SQL positioned update/delete statements to identify the
* current row in the ResultSet object generated by this statement. If
* the database doesn't support positioned update/delete, this
* method is a noop. To insure that a cursor has the proper isolation
* level to support updates, the cursor's SELECT statement should be
* of the form 'select for update ...'. If the 'for update' phrase is
* omitted, positioned updates may fail.
*
*
Note: By definition, positioned update/delete
* execution must be done by a different Statement object than the one
* which generated the ResultSet object being used for positioning. Also,
* cursor names must be unique within a connection.
*
* @param name the new cursor name, which must be unique within
* a connection
* @exception SQLException if a database access error occurs
*/
public void setCursorName(String name) throws SQLException {
this.cursorName = name;
}
boolean isUpdatableCursor() {
return cursorName != null;
}
//----------------------- Multiple Results --------------------------
/**
* Executes an SQL statement that may return multiple results.
* Under some (uncommon) situations a single SQL statement may return
* multiple result sets and/or update counts. Normally you can ignore
* this unless you are (1) executing a stored procedure that you know may
* return multiple results or (2) you are dynamically executing an
* unknown SQL string. The methods execute,
* getMoreResults, getResultSet,
* and getUpdateCount let you navigate through multiple results.
*
* The execute method executes an SQL statement and indicates the
* form of the first result. You can then use the methods
* getResultSet or getUpdateCount
* to retrieve the result, and getMoreResults to
* move to any subsequent result(s).
*
* @param sql any SQL statement
* @return true if the next result is a ResultSet object;
* false if it is an update count or there are no more results
* @exception SQLException if a database access error occurs
* @see #getResultSet
* @see #getUpdateCount
* @see #getMoreResults
*/
public boolean execute(String sql) throws SQLException {
checkValidity();
currentStatementGeneratedKeys = false;
return executeImpl(sql);
}
/**
* Internal implementation of {@link #execute(String)}, so it can be used for normal queries
* and for queries returning generated keys.
*
* @see #execute(String)
*/
protected boolean executeImpl(String sql) throws SQLException {
synchronized (getSynchronizationObject()) {
notifyStatementStarted();
boolean hasResultSet = false;
try {
hasResultSet = internalExecute(sql);
} finally {
if (!hasResultSet) {
notifyStatementCompleted();
}
}
return hasResultSet;
}
}
private boolean executeImpl(AbstractGeneratedKeysQuery query) throws SQLException {
currentStatementGeneratedKeys = query.generatesKeys();
return executeImpl(query.getQueryString());
}
/**
* Returns the current result as a ResultSet object.
* This method should be called only once per result.
* Calling this method twice with autocommit on and used will probably
* throw an inappropriate or uninformative exception.
*
* @return the current result as a ResultSet object;
* null if the result is an update count or there are no more results
* @exception SQLException if a database access error occurs
* @see #execute
*/
public ResultSet getResultSet() throws SQLException {
checkValidity();
return getResultSet(false);
}
public ResultSet getResultSet(boolean metaDataQuery) throws SQLException {
if (fbStatement == null) {
throw new FBSQLException("No statement was executed.");
}
if (cursorName != null) {
fbStatement.setCursorName(cursorName);
}
if (currentRs != null) {
throw new FBSQLException("Only one result set at a time/statement.");
}
// A generated keys query does not produce a normal result set (but EXECUTE PROCEDURE or INSERT ... RETURNING without Statement.RETURN_GENERATED_KEYS do)
// TODO Behavior might not be correct for callable statement implementation
if (!isGeneratedKeyQuery() && currentStatementResult == StatementResult.RESULT_SET) {
if (!isSingletonResult) {
currentRs = new FBResultSet(connection, this, fbStatement, resultSetListener, metaDataQuery, rsType,
rsConcurrency, rsHoldability, false);
} else if (!specialResult.isEmpty()) {
currentRs = new FBResultSet(fbStatement.getFieldDescriptor(),
new ArrayList<>(specialResult), resultSetListener);
}
return currentRs;
}
return null;
}
public boolean hasOpenResultSet() {
return currentRs != null;
}
/**
* Returns the current result as an update count;
* if the result is a ResultSet object or there are no more results, -1
* is returned. This method should be called only once per result.
*
* @return the current result as an update count; -1 if the current result is a
* ResultSet object or there are no more results
* @exception SQLException if a database access error occurs
* @see #execute
*/
public int getUpdateCount() throws SQLException {
checkValidity();
if (currentStatementResult != StatementResult.UPDATE_COUNT) {
return -1;
}
populateSqlCounts();
int insCount = sqlCountHolder.getIntegerInsertCount();
int updCount = sqlCountHolder.getIntegerUpdateCount();
int delCount = sqlCountHolder.getIntegerDeleteCount();
return Math.max(Math.max(updCount, delCount), insCount);
}
private void populateSqlCounts() throws SQLException {
if (sqlCountHolder == null) {
sqlCountHolder = fbStatement.getSqlCounts();
}
}
private static final int INSERTED_ROWS_COUNT = 1;
private static final int UPDATED_ROWS_COUNT = 2;
private static final int DELETED_ROWS_COUNT = 3;
private int getChangedRowsCount(int type) throws SQLException {
if (currentStatementResult != StatementResult.UPDATE_COUNT) {
return -1;
}
populateSqlCounts();
switch (type) {
case INSERTED_ROWS_COUNT:
return sqlCountHolder.getIntegerInsertCount();
case UPDATED_ROWS_COUNT:
return sqlCountHolder.getIntegerUpdateCount();
case DELETED_ROWS_COUNT:
return sqlCountHolder.getIntegerDeleteCount();
default:
throw new IllegalArgumentException(String.format("Specified type %d is unknown.", type));
}
}
public int getDeletedRowsCount() throws SQLException {
return getChangedRowsCount(DELETED_ROWS_COUNT);
}
public int getInsertedRowsCount() throws SQLException {
return getChangedRowsCount(INSERTED_ROWS_COUNT);
}
public int getUpdatedRowsCount() throws SQLException {
return getChangedRowsCount(UPDATED_ROWS_COUNT);
}
/**
* Moves to a Statement object's next result. It returns
* true if this result is a ResultSet object.
* This method also implicitly closes any current ResultSet
* object obtained with the method getResultSet.
*
*
There are no more results when the following is true:
*
* (!getMoreResults() && (getUpdateCount() == -1)
*
*
* @return true if the next result is a ResultSet object;
* false if it is an update count or there are no more results
* @exception SQLException if a database access error occurs
* @see #execute
*/
public boolean getMoreResults() throws SQLException {
return getMoreResults(Statement.CLOSE_ALL_RESULTS);
}
public boolean getMoreResults(int mode) throws SQLException {
checkValidity();
boolean closeResultSet = mode == Statement.CLOSE_ALL_RESULTS
|| mode == Statement.CLOSE_CURRENT_RESULT;
if (currentStatementResult == StatementResult.RESULT_SET && closeResultSet) {
closeResultSet(true);
}
currentStatementResult = currentStatementResult.nextResult();
// Technically the statement below is always false, as only the first result is ever a ResultSet
return currentStatementResult == StatementResult.RESULT_SET;
}
@Override
public void setFetchDirection(int direction) throws SQLException {
checkValidity();
switch (direction) {
case ResultSet.FETCH_FORWARD:
case ResultSet.FETCH_REVERSE:
case ResultSet.FETCH_UNKNOWN:
fetchDirection = direction;
break;
default:
throw FbExceptionBuilder.forException(JaybirdErrorCodes.jb_invalidFetchDirection)
.messageParameter(direction)
.toFlatSQLException();
}
}
@Override
public int getFetchDirection() throws SQLException {
checkValidity();
return fetchDirection;
}
/**
* Gives the JDBC driver a hint as to the number of rows that should
* be fetched from the database when more rows are needed for
* ResultSet objects genrated by this Statement.
* If the value specified is zero, then the hint is ignored.
* The default value is zero.
*
* @param rows the number of rows to fetch
* @exception SQLException if a database access error occurs,
* this method is called on a closed Statement or the
* condition rows >= 0 is not satisfied.
* @since 1.2
* @see #getFetchSize
*/
public void setFetchSize(int rows) throws SQLException {
checkValidity();
if (rows < 0)
throw new FBSQLException("Can't set negative fetch size", SQLStateConstants.SQL_STATE_INVALID_ARG_VALUE);
else
fetchSize = rows;
}
/**
* Retrieves the number of result set rows that is the default
* fetch size for ResultSet objects
* generated from this Statement object.
* If this Statement object has not set
* a fetch size by calling the method setFetchSize,
* the return value is implementation-specific.
*
* @return the default fetch size for result sets generated
* from this Statement object
* @exception SQLException if a database access error occurs or
* this method is called on a closed Statement
* @since 1.2
* @see #setFetchSize
*/
public int getFetchSize() throws SQLException {
checkValidity();
return fetchSize;
}
/**
* Retrieves the result set concurrency for ResultSet objects
* generated by this Statement object.
*
* @return either ResultSet.CONCUR_READ_ONLY or
* ResultSet.CONCUR_UPDATABLE
* @since 1.2
* @see What Is in the JDBC
* 2.0 API
*/
public int getResultSetConcurrency() throws SQLException {
return rsConcurrency;
}
/**
* Retrieves the result set type for ResultSet objects
* generated by this Statement object.
*
* @return one of ResultSet.TYPE_FORWARD_ONLY,
* ResultSet.TYPE_SCROLL_INSENSITIVE, or
* ResultSet.TYPE_SCROLL_SENSITIVE
* @since 1.2
* @see What Is in the JDBC
* 2.0 API
*/
public int getResultSetType() throws SQLException {
return rsType;
}
public int getResultSetHoldability() throws SQLException {
return rsHoldability;
}
private List batchList = new ArrayList<>();
/**
* Adds an SQL command to the current batch of commmands for this
* Statement object. This method is optional.
*
* @param sql typically this is a static SQL INSERT or
* UPDATE statement
* @exception SQLException if a database access error occurs, or the
* driver does not support batch statements
* @since 1.2
* @see What Is in the JDBC
* 2.0 API
*/
public void addBatch( String sql ) throws SQLException {
batchList.add(sql);
}
/**
* Makes the set of commands in the current batch empty.
* This method is optional.
*
* @exception SQLException if a database access error occurs or the
* driver does not support batch statements
* @since 1.2
* @see What Is in the JDBC
* 2.0 API
*/
public void clearBatch() throws SQLException {
batchList.clear();
}
/**
* Submits a batch of commands to the database for execution and
* if all commands execute successfully, returns an array of update counts.
* The int elements of the array that is returned are ordered
* to correspond to the commands in the batch, which are ordered
* according to the order in which they were added to the batch.
* The elements in the array returned by the method executeBatch
* may be one of the following:
*
* - A number greater than or equal to zero -- indicates that the
* command was processed successfully and is an update count giving the
* number of rows in the database that were affected by the command's
* execution
*
- A value of
-2 -- indicates that the command was
* processed successfully but that the number of rows affected is
* unknown
*
* If one of the commands in a batch update fails to execute properly,
* this method throws a BatchUpdateException, and a JDBC
* driver may or may not continue to process the remaining commands in
* the batch. However, the driver's behavior must be consistent with a
* particular DBMS, either always continuing to process commands or never
* continuing to process commands. If the driver continues processing
* after a failure, the array returned by the method
* BatchUpdateException.getUpdateCounts
* will contain as many elements as there are commands in the batch, and
* at least one of the elements will be the following:
*
*
- A value of
-3 -- indicates that the command failed
* to execute successfully and occurs only if a driver continues to
* process commands after a command fails
*
*
* A driver is not required to implement this method.
* The possible implementations and return values have been modified in
* the Java 2 SDK, Standard Edition, version 1.3 to
* accommodate the option of continuing to proccess commands in a batch
* update after a BatchUpdateException obejct has been thrown.
*
* @return an array of update counts containing one element for each
* command in the batch. The elements of the array are ordered according
* to the order in which commands were added to the batch.
* @exception SQLException if a database access error occurs or the
* driver does not support batch statements. Throws {@link java.sql.BatchUpdateException}
* (a subclass of SQLException) if one of the commands sent to the
* database fails to execute properly or attempts to return a result set.
* @since 1.3
* @see What Is in the JDBC
* 2.0 API
*/
public final int[] executeBatch() throws SQLException {
if (connection.getAutoCommit()) {
addWarning(new SQLWarning("Batch updates should be run with auto-commit disabled.", "01000"));
}
return toArray(executeBatchInternal());
}
protected List executeBatchInternal() throws SQLException {
checkValidity();
currentStatementGeneratedKeys = false;
notifyStatementStarted();
synchronized (getSynchronizationObject()) {
boolean success = false;
try {
List responses = new ArrayList<>(batchList.size());
try {
for (String sql : batchList) {
executeSingleForBatch(responses, sql);
}
success = true;
return responses;
} catch (SQLException e) {
throw jdbcVersionSupport.createBatchUpdateException(e.getMessage(), e.getSQLState(),
e.getErrorCode(), toLargeArray(responses), e);
} finally {
clearBatch();
}
} finally {
notifyStatementCompleted(success);
}
}
}
private void executeSingleForBatch(List responses, String sql) throws SQLException {
if (internalExecute(sql)) {
// TODO SQL state?
throw jdbcVersionSupport.createBatchUpdateException(
"Statements executed as batch should not produce a result set",
SQLStateConstants.SQL_STATE_GENERAL_ERROR, 0, toLargeArray(responses), null);
} else {
responses.add(getLargeUpdateCount());
}
}
/**
* Convert collection of {@link Long} update counts into array of int.
*
* @param updateCounts
* collection of integer elements.
*
* @return array of int.
*/
protected int[] toArray(Collection updateCounts) {
int[] result = new int[updateCounts.size()];
int counter = 0;
for (long value : updateCounts) {
result[counter++] = (int) value;
}
return result;
}
/**
* Convert collection of {@link Integer} update counts into array of int.
*
* @param updateCounts
* collection of integer elements.
*
* @return array of int.
*/
protected long[] toLargeArray(Collection updateCounts) {
long[] result = new long[updateCounts.size()];
int counter = 0;
for (long value : updateCounts) {
result[counter++] = value;
}
return result;
}
/**
* Returns the Connection object that produced this
* Statement object.
*
* @return the connection that produced this statement
*/
public Connection getConnection() throws SQLException {
checkValidity();
return connection;
}
//package level
void closeResultSet(boolean notifyListener) throws SQLException {
closeResultSet(notifyListener, CompletionReason.OTHER);
}
void closeResultSet(boolean notifyListener, CompletionReason completionReason) throws SQLException {
boolean wasCompleted = completed;
try {
if (currentRs != null) {
try {
currentRs.close(notifyListener, completionReason);
} finally {
currentRs = null;
}
} else if (fbStatement != null) {
fbStatement.ensureClosedCursor(completionReason.isTransactionEnd());
}
} finally {
if (notifyListener && !wasCompleted)
statementListener.statementCompleted(this);
}
}
public void forgetResultSet() { //yuck should be package
// TODO Use case unclear, find out if this needs to be added to fbStatement somehow
currentRs = null;
}
public ResultSet getCurrentResultSet() throws SQLException {
return currentRs;
}
public boolean isPoolable() throws SQLException {
checkValidity();
return false;
}
public void setPoolable(boolean poolable) throws SQLException {
checkValidity();
// ignore the hint
}
public boolean isWrapperFor(Class iface) throws SQLException {
return iface != null && iface.isAssignableFrom(getClass());
}
public T unwrap(Class iface) throws SQLException {
if (!isWrapperFor(iface))
throw new SQLException("Unable to unwrap to class " + iface.getName());
return iface.cast(this);
}
// JDBC 4.1
public void closeOnCompletion() {
closeOnCompletion = true;
}
public boolean isCloseOnCompletion() {
return closeOnCompletion;
}
/**
* This method checks if supplied statement is executing procedure or
* it is generic statement. This check is needed to handle correctly
* parameters that are returned from non-selectable procedures.
*
* @param sql SQL statement to check
*
* @return true if supplied statement is EXECUTE PROCEDURE
* type of statement.
*
* @throws SQLException if translating statement into native code failed.
*/
protected boolean isExecuteProcedureStatement(String sql) throws SQLException {
final String trimmedSql = nativeSQL(sql).trim();
return trimmedSql.startsWith("EXECUTE");
}
protected boolean internalExecute(String sql) throws SQLException {
checkValidity();
prepareFixedStatement(sql);
fbStatement.execute(RowValue.EMPTY_ROW_VALUE);
return currentStatementResult == StatementResult.RESULT_SET;
}
protected void prepareFixedStatement(String sql) throws SQLException {
// TODO: Statement should be created and allocated at FBStatement creation only.
if (fbStatement == null) {
fbStatement = gdsHelper.allocateStatement();
fbStatement.addStatementListener(createStatementListener());
} else {
fbStatement.setTransaction(gdsHelper.getCurrentTransaction());
}
fbStatement.prepare(escapedProcessing ? nativeSQL(sql) : sql);
}
protected void addWarning(SQLWarning warning) {
if (firstWarning == null) {
firstWarning = warning;
} else {
firstWarning.setNextWarning(warning);
}
}
protected String nativeSQL(String sql) throws SQLException {
if (connection != null) {
return connection.nativeSQL(sql);
} else {
DatabaseParameterBuffer dpb = gdsHelper.getDatabaseParameterBuffer();
EscapeParserMode mode = dpb.hasArgument(DatabaseParameterBufferExtension.USE_STANDARD_UDF)
? EscapeParserMode.USE_STANDARD_UDF
: EscapeParserMode.USE_BUILT_IN;
return new FBEscapedParser(mode).parse(sql);
}
}
/**
* @return true when the current statement is expected to return generated keys, false otherwise.
*/
protected boolean isGeneratedKeyQuery() {
return currentStatementGeneratedKeys;
}
/**
* Get the execution plan of this PreparedStatement
*
* @return The execution plan of the statement
*/
String getExecutionPlan() throws SQLException {
return fbStatement.getExecutionPlan();
}
public String getLastExecutionPlan() throws SQLException {
checkValidity();
if (fbStatement == null) {
throw new FBSQLException("No statement was executed, plan cannot be obtained.");
}
return getExecutionPlan();
}
/**
* Get the statement type of this PreparedStatement.
* The returned value will be one of the TYPE_* constant
* values.
*
* @return The identifier for the given statement's type
*/
int getStatementType() throws SQLException {
if (fbStatement == null) {
return StatementType.NONE.getStatementTypeCode();
}
return fbStatement.getType().getStatementTypeCode();
}
/**
* Check if this statement is valid. This method should be invoked before
* executing any action which requires a valid connection.
*
* @throws SQLException if this Statement has been closed and cannot be used anymore.
*/
protected void checkValidity() throws SQLException {
if (isClosed()) {
throw new FBSQLException("Statement is already closed.", SQLStateConstants.SQL_STATE_INVALID_STATEMENT_ID);
}
}
public long getLargeUpdateCount() throws SQLException {
checkValidity();
if (currentStatementResult != StatementResult.UPDATE_COUNT) {
return -1;
}
populateSqlCounts();
final long insCount = sqlCountHolder.getLongInsertCount();
final long updCount = sqlCountHolder.getLongUpdateCount();
final long delCount = sqlCountHolder.getLongDeleteCount();
return Math.max(Math.max(insCount, updCount), delCount);
}
/**
* {@inheritDoc}
*
* Jaybird does not support maxRows exceeding {@link Integer#MAX_VALUE}, if a larger value is set, Jaybird will
* add a warning to the statement and reset the maximum to 0.
*
*/
public void setLargeMaxRows(long max) throws SQLException {
if (max > Integer.MAX_VALUE) {
addWarning(new SQLWarning(
String.format("Implementation limit: maxRows cannot exceed Integer.MAX_VALUE, value was %d, reset to 0", max),
SQLStateConstants.SQL_STATE_INVALID_ARG_VALUE));
max = 0;
}
setMaxRows((int) max);
}
/**
* {@inheritDoc}
*
* Jaybird does not support maxRows exceeding {@link Integer#MAX_VALUE}, the return value of this method is the
* same as {@link #getMaxRows()}.
*
*/
public long getLargeMaxRows() throws SQLException {
return getMaxRows();
}
public final long[] executeLargeBatch() throws SQLException {
if (connection.getAutoCommit()) {
addWarning(new SQLWarning("Batch updates should be run with auto-commit disabled.", "01000"));
}
return toLargeArray(executeBatchInternal());
}
public final long executeLargeUpdate(String sql) throws SQLException {
executeUpdate(sql);
return getLargeUpdateCount();
}
public final long executeLargeUpdate(String sql, int autoGeneratedKeys) throws SQLException {
executeUpdate(sql, autoGeneratedKeys);
return getLargeUpdateCount();
}
public final long executeLargeUpdate(String sql, int[] columnIndexes) throws SQLException {
executeUpdate(sql, columnIndexes);
return getLargeUpdateCount();
}
public final long executeLargeUpdate(String sql, String[] columnNames) throws SQLException {
executeUpdate(sql, columnNames);
return getLargeUpdateCount();
}
/**
* Returns a {@code String} enclosed in single quotes. Any occurrence of a single quote within the string will be
* replaced by two single quotes.
*
* For a dialect 3 database, this will behave exactly like the JDBC 4.3 default implementation. For a
* dialect 1 database this will quote literals with double quotes and escape double quotes by doubling.
*
*
* @param val a character string
* @return A string enclosed by single quotes with every single quote
* converted to two single quotes
* @throws NullPointerException if val is {@code null}
* @throws SQLException if a database access error occurs
*/
public String enquoteLiteral(String val) throws SQLException {
if (gdsHelper.getCurrentDatabase().getDatabaseDialect() == 1) {
return '"' + val.replace("\"", "\"\"") + '"';
}
return "'" + val.replace("'", "''") + "'";
}
/**
* @see #enquoteLiteral(String)
*/
public String enquoteNCharLiteral(String val) throws SQLException {
return enquoteLiteral(val);
}
private static final Pattern SIMPLE_IDENTIFIER_PATTERN = Pattern.compile("[\\p{Alpha}][\\p{Alnum}_$]*");
/**
* Returns a SQL identifier. If {@code identifier} is a simple SQL identifier:
*
* - Return the original value if {@code alwaysQuote} is
* {@code false}
* - Return a delimited identifier if {@code alwaysQuote} is
* {@code true}
*
*
* @param identifier a SQL identifier
* @param alwaysQuote indicates if a simple SQL identifier should be
* returned as a quoted identifier
* @return A simple SQL identifier or a delimited identifier
* @throws SQLException if identifier is not a valid identifier
* @throws SQLFeatureNotSupportedException if the datasource does not support
* delimited identifiers (ie: a dialect 1 database)
* @throws NullPointerException if identifier is {@code null}
*/
public String enquoteIdentifier(String identifier, boolean alwaysQuote) throws SQLException {
int len = identifier.length();
if (len < 1 || len > getConnection().getMetaData().getMaxColumnNameLength()) {
throw new SQLException("Invalid name");
}
if (!alwaysQuote && SIMPLE_IDENTIFIER_PATTERN.matcher(identifier).matches()) {
return identifier;
}
if (gdsHelper.getCurrentDatabase().getDatabaseDialect() == 1) {
throw new SQLFeatureNotSupportedException("Quoted identifiers not supported in dialect 1");
}
if (identifier.matches("^\".+\"$")) {
// We assume double quotes are already properly escaped within
return identifier;
}
return "\"" + identifier.replace("\"", "\"\"") + "\"";
}
/**
* Retrieves whether {@code identifier} is a simple SQL identifier.
*
* @param identifier a SQL identifier
* @return true if a simple SQL identifier, false otherwise
* @throws NullPointerException if identifier is {@code null}
* @throws SQLException if a database access error occurs
*/
public boolean isSimpleIdentifier(String identifier) throws SQLException {
int len = identifier.length();
return len >= 1 && len <= getConnection().getMetaData().getMaxColumnNameLength()
&& SIMPLE_IDENTIFIER_PATTERN.matcher(identifier).matches();
}
@Override
public final int getLocalStatementId() {
return localStatementId;
}
@Override
public final int hashCode() {
return localStatementId;
}
@Override
public final boolean equals(Object other) {
if (!(other instanceof FirebirdStatement)) {
return false;
}
FirebirdStatement otherStmt = (FirebirdStatement) other;
return this.localStatementId == otherStmt.getLocalStatementId();
}
/**
* The current result of a statement.
*/
protected enum StatementResult {
RESULT_SET {
@Override
public StatementResult nextResult() {
return UPDATE_COUNT;
}
},
UPDATE_COUNT {
@Override
public StatementResult nextResult() {
return NO_MORE_RESULTS;
}
},
NO_MORE_RESULTS {
@Override
public StatementResult nextResult() {
return NO_MORE_RESULTS;
}
};
/**
* @return Next result
*/
public abstract StatementResult nextResult();
}
/**
* Creates the {@link org.firebirdsql.gds.ng.listeners.StatementListener} to be associated with the instance of
* {@link org.firebirdsql.gds.ng.FbStatement} created for this {@link FBStatement} or subclasses.
*
* @return instance of {@link org.firebirdsql.gds.ng.listeners.StatementListener}
*/
protected StatementListener createStatementListener() {
return new FBStatementListener();
}
private final class FBStatementListener implements StatementListener {
@Override
public void receivedRow(FbStatement sender, RowValue rowValue) {
if (!isValidSender(sender)) return;
// TODO May need extra condition to distinguish between singleton result of EXECUTE PROCEDURE and INSERT ... RETURNING ...
if (isSingletonResult) {
specialResult.clear();
specialResult.add(rowValue);
}
}
@Override
public void allRowsFetched(FbStatement sender) {
if (!isValidSender(sender)) return;
// TODO Evaluate if we need to do any processing
}
@Override
public void statementExecuted(FbStatement sender, boolean hasResultSet, boolean hasSingletonResult) {
if (!isValidSender(sender)) return;
// TODO If true create ResultSet and attach listener to sender
currentStatementResult = hasResultSet || hasSingletonResult && !isGeneratedKeyQuery()
? StatementResult.RESULT_SET
: StatementResult.UPDATE_COUNT;
isSingletonResult = hasSingletonResult;
}
@Override
public void statementStateChanged(FbStatement sender, StatementState newState, StatementState previousState) {
if (!isValidSender(sender)) return;
switch (newState) {
case PREPARED:
// TODO Evaluate correct changes when state goes to prepared
break;
case EXECUTING:
specialResult.clear();
sqlCountHolder = null;
currentStatementResult = StatementResult.NO_MORE_RESULTS;
isSingletonResult = false;
try {
clearWarnings();
} catch (SQLException e) {
// Ignoring exception (can't happen in current implementation)
throw new AssertionError("Unexpected SQLException");
}
break;
}
}
@Override
public void warningReceived(FbStatement sender, SQLWarning warning) {
if (!isValidSender(sender)) return;
addWarning(warning);
}
@Override
public void sqlCounts(FbStatement sender, SqlCountHolder sqlCounts) {
if (!isValidSender(sender)) return;
sqlCountHolder = sqlCounts;
}
private boolean isValidSender(FbStatement sender) {
if (sender != fbStatement) {
log.debug(String.format("Received statement listener update from unrelated statement [%s]", sender.toString()));
sender.removeStatementListener(this);
return false;
}
return true;
}
}
}