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1: /* 2: Copyright (c) 2001, 2003 Free Software Foundation, Inc. 3: 4: This file is part of GNU Classpath. 5: 6: GNU Classpath is free software; you can redistribute it and/or modify 7: it under the terms of the GNU General Public License as published by 8: the Free Software Foundation; either version 2, or (at your option) 9: any later version. 10: 11: GNU Classpath is distributed in the hope that it will be useful, but 12: WITHOUT ANY WARRANTY; without even the implied warranty of 13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14: General Public License for more details. 15: 16: You should have received a copy of the GNU General Public License 17: along with GNU Classpath; see the file COPYING. If not, write to the 18: Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 19: 02110-1301 USA. 20: 21: Linking this library statically or dynamically with other modules is 22: making a combined work based on this library. Thus, the terms and 23: conditions of the GNU General Public License cover the whole 24: combination. 25: 26: As a special exception, the copyright holders of this library give you 27: permission to link this library with independent modules to produce an 28: executable, regardless of the license terms of these independent 29: modules, and to copy and distribute the resulting executable under 30: terms of your choice, provided that you also meet, for each linked 31: independent module, the terms and conditions of the license of that 32: module. An independent module is a module which is not derived from 33: or based on this library. If you modify this library, you may extend 34: this exception to your version of the library, but you are not 35: obligated to do so. If you do not wish to do so, delete this 36: exception statement from your version. */ 37: 38: package gnu.java.rmi.rmic; 39: 40: import java.io.InputStream; 41: 42: /** 43: * Subclass of Compiler that can be subclassed to invoke a process to 44: * do its work. 45: */ 46: public abstract class CompilerProcess extends Compiler 47: { 48: /** This is used to compute the command line for the process. */ 49: public abstract String[] computeArguments (String filename); 50: 51: /** 52: * This is used to compute the command line for the process. 53: * Most compilers typically arrange their arguments as in 54: * <compiler name and arguments> <optional destination> <filename>. 55: * This method builds an argument array out that. It should be used 56: * to define computeArguments for those compilers that follow the 57: * argument convention described above. 58: */ 59: public static String[] computeTypicalArguments(String[] compilerArgs, 60: String destination, String filename) 61: { 62: return computeTypicalArguments(compilerArgs, null, destination, filename); 63: } 64: /** 65: * This is used to compute the command line for the process. 66: * Most compilers typically arrange their arguments as in 67: * <compiler name and arguments> <optional destination> <filename>. 68: * This method builds an argument array out that. It should be used 69: * to define computeArguments for those compilers that follow the 70: * argument convention described above. 71: */ 72: public static String[] computeTypicalArguments(String[] compilerArgs, 73: String classpath, 74: String destination, 75: String filename) 76: { 77: /* length of compiler specific arguments */ 78: int len = compilerArgs.length; 79: 80: /* length of returned array of arguments */ 81: final int arglen = len + (classpath == null ? 0 : 2) + 82: (destination == null ? 0 : 2) + 1; 83: 84: /* Allocate String array for computed arguments. */ 85: String [] args = new String[arglen]; 86: 87: /* Fill in compiler arguments. */ 88: System.arraycopy(compilerArgs, 0, args, 0, len); 89: 90: /* Fill in classpath argument if necessary. */ 91: if (classpath != null) 92: { 93: args[len++] = "-classpath"; 94: args[len++] = classpath; 95: } 96: 97: /* Fill in destination argument if necessary. */ 98: if (destination != null) 99: { 100: args[len++] = "-d"; 101: args[len++] = destination; 102: } 103: 104: /* Fill in filename */ 105: args[arglen - 1] = filename; 106: 107: return args; 108: } 109: 110: public void compile (String name) throws Exception 111: { 112: String[] args = computeArguments (name); 113: Process p = Runtime.getRuntime ().exec (args); 114: 115: /* Print compiler output to System.out. Do this asynchronously so 116: that the compiler never blocks writing to its stdout. */ 117: { 118: final InputStream procin = p.getInputStream(); 119: final Thread copier = new Thread() 120: { 121: public void run() 122: { 123: try 124: { 125: for (int ch = procin.read(); ch != -1; ch = procin.read()) 126: System.out.print((char) ch); 127: } 128: catch (java.io.IOException _) 129: { 130: } 131: } 132: }; 133: 134: copier.start(); 135: } 136: 137: /* Collect compiler error output in a buffer. 138: * If compilation fails, it will be used for an error message. 139: */ 140: StringBuffer stderr = new StringBuffer(); 141: InputStream procerr = p.getErrorStream(); 142: for (int ch = procerr.read(); ch != -1; ch = procerr.read()) 143: stderr.append((char) ch); 144: 145: int result; 146: while (true) 147: { 148: try 149: { 150: result = p.waitFor (); 151: break; 152: } 153: catch (InterruptedException _) 154: { 155: } 156: } 157: if (result != 0) 158: { 159: // FIXME: wrong exception class. 160: throw new Exception ("compiler exited with status: " + result, 161: new RMICException(stderr.toString())); 162: } 163: } 164: }