| Line | Hits | Source |
|---|---|---|
| 1 | /* | |
| 2 | ||
| 3 | Copyright 2004, Martian Software, Inc. | |
| 4 | ||
| 5 | Licensed under the Apache License, Version 2.0 (the "License"); | |
| 6 | you may not use this file except in compliance with the License. | |
| 7 | You may obtain a copy of the License at | |
| 8 | ||
| 9 | http://www.apache.org/licenses/LICENSE-2.0 | |
| 10 | ||
| 11 | Unless required by applicable law or agreed to in writing, software | |
| 12 | distributed under the License is distributed on an "AS IS" BASIS, | |
| 13 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| 14 | See the License for the specific language governing permissions and | |
| 15 | limitations under the License. | |
| 16 | ||
| 17 | */ | |
| 18 | ||
| 19 | package com.martiansoftware.nailgun; | |
| 20 | ||
| 21 | import java.io.FilterInputStream; | |
| 22 | import java.io.IOException; | |
| 23 | ||
| 24 | /** | |
| 25 | * A FilterInputStream that is able to read the chunked stdin stream | |
| 26 | * from a NailGun client. | |
| 27 | * | |
| 28 | * @author <a href="http://www.martiansoftware.com/contact.html">Marty Lamb</a> | |
| 29 | */ | |
| 30 | class NGInputStream extends FilterInputStream { | |
| 31 | ||
| 32 | private byte[] header; | |
| 33 | 2 | private boolean eof = false; |
| 34 | 2 | private long remaining = 0; |
| 35 | ||
| 36 | /** | |
| 37 | * Creates a new NGInputStream wrapping the specified InputStream | |
| 38 | * @param in the InputStream to wrap | |
| 39 | */ | |
| 40 | public NGInputStream(java.io.InputStream in) { | |
| 41 | 2 | super(in); |
| 42 | 2 | header = new byte[5]; |
| 43 | 2 | } |
| 44 | ||
| 45 | /** | |
| 46 | * Reads a NailGun chunk header from the underlying InputStream. | |
| 47 | * | |
| 48 | * @throws IOException if thrown by the underlying InputStream, | |
| 49 | * or if an unexpected NailGun chunk type is encountered. | |
| 50 | */ | |
| 51 | private void readHeader() throws IOException { | |
| 52 | 6 | if (eof) return; |
| 53 | ||
| 54 | 6 | int bytesRead = in.read(header); |
| 55 | 6 | int thisPass = 0; |
| 56 | 6 | while (bytesRead < 5) { |
| 57 | 0 | thisPass = in.read(header, bytesRead, 5 - bytesRead); |
| 58 | 0 | if (thisPass < 0) { |
| 59 | 0 | eof = true; |
| 60 | 0 | return; |
| 61 | } | |
| 62 | 0 | bytesRead += thisPass; |
| 63 | } | |
| 64 | 6 | switch(header[4]) { |
| 65 | case NGConstants.CHUNKTYPE_STDIN: | |
| 66 | 4 | remaining = LongUtils.fromArray(header, 0); |
| 67 | 4 | break; |
| 68 | ||
| 69 | case NGConstants.CHUNKTYPE_STDIN_EOF: | |
| 70 | 2 | eof = true; |
| 71 | 2 | break; |
| 72 | ||
| 73 | 0 | default: throw(new IOException("Unknown stream type: " + (char) header[4])); |
| 74 | } | |
| 75 | 6 | } |
| 76 | ||
| 77 | /** | |
| 78 | * @see java.io.InputStream#available() | |
| 79 | */ | |
| 80 | public int available() throws IOException { | |
| 81 | 1 | if (eof) return(0); |
| 82 | 1 | if (remaining > 0) return (in.available()); |
| 83 | 1 | return (Math.max(0, in.available() - 5)); |
| 84 | } | |
| 85 | ||
| 86 | /** | |
| 87 | * @see java.io.InputStream#markSupported() | |
| 88 | */ | |
| 89 | public boolean markSupported() { | |
| 90 | 1 | return (false); |
| 91 | } | |
| 92 | ||
| 93 | /** | |
| 94 | * @see java.io.InputStream#read() | |
| 95 | */ | |
| 96 | public int read() throws IOException { | |
| 97 | // this should be more readable. | |
| 98 | // this stomps on the first byte of the header array, | |
| 99 | // which is ok | |
| 100 | 16 | return((read(header, 0, 1) == -1) ? -1 : (int) header[0]); |
| 101 | } | |
| 102 | ||
| 103 | /** | |
| 104 | * @see java.io.InputStream.read(byte[]) | |
| 105 | */ | |
| 106 | public int read(byte[] b) throws IOException { | |
| 107 | 3 | return (read(b, 0, b.length)); |
| 108 | } | |
| 109 | ||
| 110 | /** | |
| 111 | * @see java.io.InputStream.read(byte[],offset,length) | |
| 112 | */ | |
| 113 | public int read(byte[] b, int offset, int length) throws IOException { | |
| 114 | 19 | if (remaining == 0) readHeader(); |
| 115 | 19 | if (eof) return(-1); |
| 116 | ||
| 117 | 17 | int bytesToRead = Math.min((int) remaining, length); |
| 118 | 17 | int result = in.read(b, offset, bytesToRead); |
| 119 | 17 | remaining -= result; |
| 120 | 17 | return (result); |
| 121 | } | |
| 122 | ||
| 123 | } |
|
this report was generated by version 1.0.5 of jcoverage. |
copyright © 2003, jcoverage ltd. all rights reserved. |