[89] | 1 | /*
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| 2 | * Licensed to the Apache Software Foundation (ASF) under one or more
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| 3 | * contributor license agreements. See the NOTICE file distributed with
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| 4 | * this work for additional information regarding copyright ownership.
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| 5 | * The ASF licenses this file to You under the Apache License, Version 2.0
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| 6 | * (the "License"); you may not use this file except in compliance with
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| 7 | * the License. You may obtain a copy of the License at
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| 8 | *
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| 9 | * http://www.apache.org/licenses/LICENSE-2.0
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| 10 | *
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| 11 | * Unless required by applicable law or agreed to in writing, software
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| 12 | * distributed under the License is distributed on an "AS IS" BASIS,
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| 13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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| 14 | * See the License for the specific language governing permissions and
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| 15 | * limitations under the License.
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| 16 | */
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| 17 |
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| 18 | #ifndef _LOG4CXX_HELPERS_FILEINPUTSTREAM_H
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| 19 | #define _LOG4CXX_HELPERS_FILEINPUTSTREAM_H
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| 20 |
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| 21 | #include <log4cxx/helpers/inputstream.h>
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| 22 | #include <log4cxx/file.h>
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| 23 | #include <log4cxx/helpers/pool.h>
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| 24 |
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| 25 |
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| 26 | namespace log4cxx
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| 27 | {
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| 28 |
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| 29 | namespace helpers {
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| 30 |
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| 31 | /**
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| 32 | * InputStream implemented on top of APR file IO.
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| 33 | *
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| 34 | */
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| 35 | class LOG4CXX_EXPORT FileInputStream : public InputStream
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| 36 | {
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| 37 | private:
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| 38 | Pool pool;
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| 39 | apr_file_t* fileptr;
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| 40 |
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| 41 | public:
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| 42 | DECLARE_ABSTRACT_LOG4CXX_OBJECT(FileInputStream)
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| 43 | BEGIN_LOG4CXX_CAST_MAP()
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| 44 | LOG4CXX_CAST_ENTRY(FileInputStream)
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| 45 | LOG4CXX_CAST_ENTRY_CHAIN(InputStream)
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| 46 | END_LOG4CXX_CAST_MAP()
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| 47 |
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| 48 | /**
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| 49 | * Creates a FileInputStream by opening a connection to an actual
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| 50 | * file, the file named by the path name name in the file system.
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| 51 | *
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| 52 | * @param filename The system-dependent file name.
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| 53 | */
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| 54 | FileInputStream(const LogString& filename);
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| 55 | FileInputStream(const logchar* filename);
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| 56 |
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| 57 | /**
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| 58 | * Creates a FileInputStream by opening a connection to an actual
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| 59 | * file, the file named by the File object file in the file system.
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| 60 | *
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| 61 | * @param aFile The file to be opened for reading.
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| 62 | */
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| 63 | FileInputStream(const File& aFile);
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| 64 |
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| 65 | virtual ~FileInputStream();
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| 66 |
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| 67 | /**
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| 68 | * Closes this file input stream and releases any system
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| 69 | * resources associated with the stream.
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| 70 | */
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| 71 | virtual void close();
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| 72 |
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| 73 | /**
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| 74 | * Reads a sequence of bytes into the given buffer.
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| 75 | *
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| 76 | * @param buf The buffer into which bytes are to be transferred.
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| 77 | * @return the total number of bytes read into the buffer, or -1 if there
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| 78 | * is no more data because the end of the stream has been reached.
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| 79 | */
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| 80 | virtual int read(ByteBuffer& buf);
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| 81 |
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| 82 | private:
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| 83 |
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| 84 | FileInputStream(const FileInputStream&);
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| 85 |
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| 86 | FileInputStream& operator=(const FileInputStream&);
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| 87 | void open(const LogString&);
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| 88 |
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| 89 | };
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| 90 |
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| 91 | LOG4CXX_PTR_DEF(FileInputStream);
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| 92 | } // namespace helpers
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| 93 |
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| 94 | } //namespace log4cxx
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| 95 |
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| 96 | #endif //_LOG4CXX_HELPERS_FILEINPUTSTREAM_H
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