IOS应用源码Demo-图书管理系统-毕设学习.zip

/* * Copyright (c) 2008 Plausible Labs Cooperative, Inc. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the copyright holder nor the names of any contributors * may be used to endorse or promote products derived from this * software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ /** * Result values returned when iterating PLResetSet rows. * * @ingroup constants */ typedef enum { /** No further rows available */ PLResultSetStatusDone = 0, /** An additional row is available. */ PLResultSetStatusRow = 1, /** An error occured retrieving the row. */ PLResultSetStatusError = 2 } PLResultSetStatus; /** * Represents a set of results returned by an SQL query. * * @par Thread Safety * PLResultSet instances implement no locking and must not be shared between threads * without external synchronization. */ @protocol PLResultSet <NSObject> /** * Move the result cursor to the next available row. If no further rows * are available or an error occurs, returns NO. * * @return YES if the cursor was moved to the next row, NO if no further rows were available or an error * has occured. * * @deprecated This method fails to differentiate between end of rows and an error condition. New code should be * written to use -[PLResultSet nextAndReturnError:]. */ - (BOOL) next; /** * Move the result cursor to the next available row. If no further rows * are available or an error occurs, returns NO. * * @param outError A pointer to an NSError object variable. If an error occurs, this * pointer will contain an error object indicating why the statement could not be executed. * If no error occurs, this parameter's value will not be modified. You may specify NULL for this * parameter, and no error information will be provided. * * @return Returns #PLResultSetStatusRow if the next row is available, or #PLResultSetStatusDone if no * further rows are available. If an error occurs, #PLResultSetStatusError will be returned. */ - (PLResultSetStatus) nextAndReturnError: (NSError **) outError; /** * Close the result set, and return any held database resources. After calling, * no further PLResultSet methods may be called on the instance. * * As PLResultSet objects may be placed into autorelease pools, with indeterminate * release of database resources, this method should be used to ensure that the * database connection remains usable once finished with a result set. * * Failure to call close will not result in any memory leaks, but may prevent * further use of the database connection (until the result set is released). */ - (void) close; /** * Map the given column name to a column index. Will throw NSException if the column name * is unknown. * * @param name Name of the column. * @return Returns the index of the column name, or throws an NSException if the column * can not be found. */ - (int) columnIndexForName: (NSString *) name; /** * Return the integer value of the given column index from * the current result row. * * Will throw NSException if the column index is out of range, * or if the column value is NULL. */ - (int32_t) intForColumnIndex: (int) columnIdx; /** * Return the integer value of the named column from the * current result row. * * Will throw NSException if the column name is unknown, * or if the column value is NULL. */ - (int32_t) intForColumn: (NSString *) columnName; /** * Return the string value of the given column index from * the current result row. * * Will throw NSException if the column index is out of range, * or if the column value is NULL. */ - (NSString *) stringForColumnIndex: (int) columnIndex; /** * Return the string value of the named column from the * current result row. * * Will throw NSException if the column name is unknown, * or if the column value is NULL. */ - (NSString *) stringForColumn: (NSString *) columnName; /** * Returns the 64 bit big integer (long) value of the given * column index the current result row. * * Will throw NSException if the column index is out of range, * or if the column value is NULL. */ - (int64_t) bigIntForColumnIndex: (int) columnIndex; /** * Returns the 64 bit big integer (long) value of the named * column from the current result row. * * Will throw NSException if the column name is unknown, * or if the column value is NULL. */ - (int64_t) bigIntForColumn: (NSString *) columnName; /** * Returns YES if the value of the given column index is NULL, * NO otherwise. * * Will throw NSException if the column index is out of range. */ - (BOOL) isNullForColumnIndex: (int) columnIndex; /** * Returns YES if the value of the named column is NULL, * NO otherwise. * * Will throw NSException if the column index is out of range. */ - (BOOL) isNullForColumn: (NSString *) columnName; /** * Returns the BOOL value of the named column from the * current result row. * * Will throw NSException if the column name is unknown, * or if the column value is NULL. */ - (BOOL) boolForColumn: (NSString *) columnName; /** * Returns the BOOL value of the given column index from the * current result row. * * Will throw NSException if the column index is out of range, * or if the column value is NULL. */ - (BOOL) boolForColumnIndex: (int) columnIndex; /** * Returns the float value of the named column from the * current result row. * * Will throw NSException if the column name is unknown, * or if the column value is NULL. */ - (float) floatForColumn: (NSString *) columnName; /** * Returns the float value of the given column index from the * current result row. * * Will throw NSException if the column index is out of range, * or if the column value is NULL. */ - (float) floatForColumnIndex: (int) columnIndex; /** * Returns the double value of the named column from the * current result row. * * Will throw NSException if the column name is unknown, * or if the column value is NULL. */ - (double) doubleForColumn: (NSString *) columnName; /** * Returns the double value of the given column index from the * current result row. * * Will throw NSException if the column index is out of range, * or if the column value is NULL. */ - (double) doubleForColumnIndex: (int) columnIndex; /** * Returns the NSDate value of the named column from the * current result row. * * Will throw NSException if the column name is unknown, * or if the column value is NULL. */ - (NSDate *) dateForColumn: (NSString *) columnName; /** * Returns the NSDate value of the given column index from the * current result row. * * Will throw NSException if the column index is out of range, * or if the column value is NULL.