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+<?php
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you 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.
+ *
+ * @package thrift.transport
+ */
+
+namespace Thrift\Transport;
+
+use Thrift\Exception\TTransportException;
+use Thrift\Factory\TStringFuncFactory;
+
+/**
+ * Base interface for a transport agent.
+ *
+ * @package thrift.transport
+ */
+abstract class TTransport
+{
+ /**
+ * Whether this transport is open.
+ *
+ * @return boolean true if open
+ */
+ abstract public function isOpen();
+
+ /**
+ * Open the transport for reading/writing
+ *
+ * @throws TTransportException if cannot open
+ */
+ abstract public function open();
+
+ /**
+ * Close the transport.
+ */
+ abstract public function close();
+
+ /**
+ * Read some data into the array.
+ *
+ * @param int $len How much to read
+ * @return string The data that has been read
+ * @throws TTransportException if cannot read any more data
+ */
+ abstract public function read($len);
+
+ /**
+ * Guarantees that the full amount of data is read.
+ *
+ * @return string The data, of exact length
+ * @throws TTransportException if cannot read data
+ */
+ public function readAll($len)
+ {
+ // return $this->read($len);
+
+ $data = '';
+ $got = 0;
+ while (($got = TStringFuncFactory::create()->strlen($data)) < $len) {
+ $data .= $this->read($len - $got);
+ }
+
+ return $data;
+ }
+
+ /**
+ * Writes the given data out.
+ *
+ * @param string $buf The data to write
+ * @throws TTransportException if writing fails
+ */
+ abstract public function write($buf);
+
+ /**
+ * Flushes any pending data out of a buffer
+ *
+ * @throws TTransportException if a writing error occurs
+ */
+ public function flush()
+ {
+ }
+}