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Edit File : FnStream.php \| Size : 3.87 KB
<?php namespace GuzzleHttp\Psr7; use Psr\Http\Message\StreamInterface; /** * Compose stream implementations based on a hash of functions. * * Allows for easy testing and extension of a provided stream without needing * to create a concrete class for a simple extension point. * * @final / class FnStream implements StreamInterface { /* @var array / private $methods; /* @var array Methods that must be implemented in the given array / private static $slots = ['__toString', 'close', 'detach', 'rewind', 'getSize', 'tell', 'eof', 'isSeekable', 'seek', 'isWritable', 'write', 'isReadable', 'read', 'getContents', 'getMetadata']; /* * @param array $methods Hash of method name to a callable. / public function __construct(array $methods) { $this->methods = $methods; // Create the functions on the class foreach ($methods as $name => $fn) { $this->{'_fn_' . $name} = $fn; } } /* * Lazily determine which methods are not implemented. * * @throws \BadMethodCallException / public function __get($name) { throw new \BadMethodCallException(str_replace('_fn_', '', $name) . '() is not implemented in the FnStream'); } /* * The close method is called on the underlying stream only if possible. / public function __destruct() { if (isset($this->_fn_close)) { call_user_func($this->_fn_close); } } /* * An unserialize would allow the __destruct to run when the unserialized value goes out of scope. * * @throws \LogicException / public function __wakeup() { throw new \LogicException('FnStream should never be unserialized'); } /* * Adds custom functionality to an underlying stream by intercepting * specific method calls. * * @param StreamInterface $stream Stream to decorate * @param array $methods Hash of method name to a closure * * @return FnStream */ public static function decorate(StreamInterface $stream, array $methods) { // If any of the required methods were not provided, then simply // proxy to the decorated stream. foreach (array_diff(self::$slots, array_keys($methods)) as $diff) { $methods[$diff] = [$stream, $diff]; } return new self($methods); } public function __toString() { return call_user_func($this->_fn___toString); } public function close() { return call_user_func($this->_fn_close); } public function detach() { return call_user_func($this->_fn_detach); } public function getSize() { return call_user_func($this->_fn_getSize); } public function tell() { return call_user_func($this->_fn_tell); } public function eof() { return call_user_func($this->_fn_eof); } public function isSeekable() { return call_user_func($this->_fn_isSeekable); } public function rewind() { call_user_func($this->_fn_rewind); } public function seek($offset, $whence = SEEK_SET) { call_user_func($this->_fn_seek, $offset, $whence); } public function isWritable() { return call_user_func($this->_fn_isWritable); } public function write($string) { return call_user_func($this->_fn_write, $string); } public function isReadable() { return call_user_func($this->_fn_isReadable); } public function read($length) { return call_user_func($this->_fn_read, $length); } public function getContents() { return call_user_func($this->_fn_getContents); } public function getMetadata($key = null) { return call_user_func($this->_fn_getMetadata, $key); } } Back

Edit File : FnStream.php | Size : 3.87 KB

<?php

namespace GuzzleHttp\Psr7;

use Psr\Http\Message\StreamInterface;

/**
 * Compose stream implementations based on a hash of functions.
 *
 * Allows for easy testing and extension of a provided stream without needing
 * to create a concrete class for a simple extension point.
 *
 * @final
 */
class FnStream implements StreamInterface
{
    /** @var array */
    private $methods;

/** @var array Methods that must be implemented in the given array */
    private static $slots = ['__toString', 'close', 'detach', 'rewind',
        'getSize', 'tell', 'eof', 'isSeekable', 'seek', 'isWritable', 'write',
        'isReadable', 'read', 'getContents', 'getMetadata'];

/**
     * @param array $methods Hash of method name to a callable.
     */
    public function __construct(array $methods)
    {
        $this->methods = $methods;

// Create the functions on the class
        foreach ($methods as $name => $fn) {
            $this->{'_fn_' . $name} = $fn;
        }
    }

/**
     * Lazily determine which methods are not implemented.
     *
     * @throws \BadMethodCallException
     */
    public function __get($name)
    {
        throw new \BadMethodCallException(str_replace('_fn_', '', $name)
            . '() is not implemented in the FnStream');
    }

/**
     * The close method is called on the underlying stream only if possible.
     */
    public function __destruct()
    {
        if (isset($this->_fn_close)) {
            call_user_func($this->_fn_close);
        }
    }

/**
     * An unserialize would allow the __destruct to run when the unserialized value goes out of scope.
     *
     * @throws \LogicException
     */
    public function __wakeup()
    {
        throw new \LogicException('FnStream should never be unserialized');
    }

/**
     * Adds custom functionality to an underlying stream by intercepting
     * specific method calls.
     *
     * @param StreamInterface $stream  Stream to decorate
     * @param array           $methods Hash of method name to a closure
     *
     * @return FnStream
     */
    public static function decorate(StreamInterface $stream, array $methods)
    {
        // If any of the required methods were not provided, then simply
        // proxy to the decorated stream.
        foreach (array_diff(self::$slots, array_keys($methods)) as $diff) {
            $methods[$diff] = [$stream, $diff];
        }

return new self($methods);
    }

public function __toString()
    {
        return call_user_func($this->_fn___toString);
    }

public function close()
    {
        return call_user_func($this->_fn_close);
    }

public function detach()
    {
        return call_user_func($this->_fn_detach);
    }

public function getSize()
    {
        return call_user_func($this->_fn_getSize);
    }

public function tell()
    {
        return call_user_func($this->_fn_tell);
    }

public function eof()
    {
        return call_user_func($this->_fn_eof);
    }

public function isSeekable()
    {
        return call_user_func($this->_fn_isSeekable);
    }

public function rewind()
    {
        call_user_func($this->_fn_rewind);
    }

public function seek($offset, $whence = SEEK_SET)
    {
        call_user_func($this->_fn_seek, $offset, $whence);
    }

public function isWritable()
    {
        return call_user_func($this->_fn_isWritable);
    }

public function write($string)
    {
        return call_user_func($this->_fn_write, $string);
    }

public function isReadable()
    {
        return call_user_func($this->_fn_isReadable);
    }

public function read($length)
    {
        return call_user_func($this->_fn_read, $length);
    }

public function getContents()
    {
        return call_user_func($this->_fn_getContents);
    }

public function getMetadata($key = null)
    {
        return call_user_func($this->_fn_getMetadata, $key);
    }
}

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