110 lines
3.1 KiB
PHP
110 lines
3.1 KiB
PHP
<?php
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/*
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* $Id: PgSQLResultSetIterator.php,v 1.1 2004/12/04 05:58:53 gamr Exp $
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* This software consists of voluntary contributions made by many individuals
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* and is licensed under the LGPL. For more information please see
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* <http://creole.phpdb.org>.
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*/
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/**
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* Optimized iterator for PostgreSQL, based off of SQLite iterator.
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* Testing with SeekableIterator, no idea if it will keep this
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* functionality or what uses it or even how to use it as yet.
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*
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* @author Cameron Brunner <webmaster@animetorrents.com>
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* @version $Revision: 1.1 $
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* @package creole.drivers.pgsql
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*/
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class PgSQLResultSetIterator implements SeekableIterator, Countable {
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private $result;
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private $pos = 0;
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private $fetchmode;
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private $row_count;
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private $rs;
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/**
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* Construct the iterator.
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* @param PgSQLResultSet $rs
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*/
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public function __construct(PgSQLResultSet $rs)
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{
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$this->result = $rs->getResource();
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$this->fetchmode = $rs->getFetchmode();
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$this->row_count = $rs->getRecordCount();
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$this->rs = $rs; // This is to address reference count bug: http://creole.phpdb.org/trac/ticket/6
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}
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/**
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* This method actually has no effect, since we do not rewind ResultSet for iteration.
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*/
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function rewind()
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{
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$this->pos = 0;
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}
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function valid()
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{
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return ( $this->pos < $this->row_count );
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}
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/**
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* Returns the cursor position. Note that this will not necessarily
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* be 1 for the first row, since no rewind is performed at beginning
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* of iteration.
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* @return int
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*/
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function key()
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{
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return $this->pos;
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}
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/**
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* Returns the row (assoc array) at current cursor pos.
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* @return array
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*/
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function current()
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{
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return pg_fetch_array($this->result, $this->pos, $this->fetchmode);
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}
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/**
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* Advances internal cursor pos.
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*/
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function next()
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{
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$this->pos++;
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}
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/**
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* Sets cursor to specific value.
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*/
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function seek ( $index )
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{
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if ( ! is_int ( $index ) ) {
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throw new InvalidArgumentException ( 'Invalid arguement to seek' );
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}
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if ( $index < 0 || $index > $this->row_count ) {
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throw new OutOfBoundsException ( 'Invalid seek position' );
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}
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$this->pos = $index;
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}
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function count ( ) {
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return $this->row_count;
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}
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}
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