Source Code Cross Referenced for MemberFilterConfig.java in  » 6.0-JDK-Modules » j2me » sun » misc » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » 6.0 JDK Modules » j2me » sun.misc 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * 
003:         * Copyright  1990-2006 Sun Microsystems, Inc. All Rights Reserved.
004:         * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
005:         * 
006:         * This program is free software; you can redistribute it and/or
007:         * modify it under the terms of the GNU General Public License version
008:         * 2 only, as published by the Free Software Foundation. 
009:         * 
010:         * This program is distributed in the hope that it will be useful, but
011:         * WITHOUT ANY WARRANTY; without even the implied warranty of
012:         * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
013:         * General Public License version 2 for more details (a copy is
014:         * included at /legal/license.txt). 
015:         * 
016:         * You should have received a copy of the GNU General Public License
017:         * version 2 along with this work; if not, write to the Free Software
018:         * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
019:         * 02110-1301 USA 
020:         * 
021:         * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
022:         * Clara, CA 95054 or visit www.sun.com if you need additional
023:         * information or have any questions. 
024:         */
025:
026:        package sun.misc;
027:
028:        import java.io.*;
029:        import java.util.LinkedList;
030:
031:        /* 
032:         * @(#)MemberFilterConfig.java	1.5	06/10/10
033:         */
034:        /*
035:         * Input consists of a sequence of class specifiers.
036:         * Input syntax is:
037:         * CLASS classname
038:         * FIELDS
039:         *	fieldname:fieldsig
040:         *	...
041:         * METHODS
042:         *	methodname:methodsig
043:         *	...
044:         *
045:         * Classnames and signatures are all in internal format: / is the
046:         * component separator. When a class appears in a signature, it is of
047:         * the Lname; form. Method sigatures have return type.
048:         *
049:         * Either fields or methods may be missing
050:         * Newlines are not significant. 
051:         * Whitespace is not allowed within the name:sig pair.
052:         * Other whitespace is ignored.
053:         * # starts a comment.
054:         */
055:
056:        class MemberFilterConfig {
057:
058:            String fileName;
059:            FileReader inFile;
060:            StreamTokenizer in;
061:            MemberFilter filter;
062:            boolean verbose;
063:
064:            private static final String empty[] = new String[0];
065:
066:            MemberFilterConfig(String configFileName) throws IOException {
067:                fileName = configFileName;
068:                inFile = new FileReader(configFileName);
069:                in = new StreamTokenizer(new BufferedReader(inFile));
070:                // now have file open. 
071:                // Configure the tokenizer.
072:                in.commentChar('#');
073:                in.slashSlashComments(false);
074:                in.eolIsSignificant(false);
075:                in.wordChars('a', 'z');
076:                in.wordChars('A', '[');
077:                in.wordChars('0', '9');
078:                in.wordChars('<', '<'); // appears in name <init>
079:                in.wordChars('>', '>');
080:                in.wordChars('_', '_');
081:                in.wordChars(':', ':'); // make special separator wordChar
082:                in.wordChars(';', ';'); // make all parts of a signature wordChar
083:                in.wordChars('(', ')');
084:                in.wordChars('/', '/'); // make name component separator wordChar
085:                in.whitespaceChars(' ', ' '); // ignore space
086:                in.whitespaceChars('\t', '\t'); // ignore tabs
087:                // construct the MemberFilter
088:                filter = new MemberFilter();
089:            }
090:
091:            // keywords in easy-to-manipulate integer form
092:            private static final int NOKEY = 0;
093:            private static final int CLASS = 1;
094:            private static final int FIELDS = 2;
095:            private static final int METHODS = 3;
096:            private static final int MAXKEY = 3;
097:
098:            private static final String keys[] = { "", "CLASS", "FIELDS",
099:                    "METHODS" };
100:
101:            private static int keyword(String word) {
102:                for (int i = 1; i <= MAXKEY; i++) {
103:                    if (word.equals(keys[i]))
104:                        return i;
105:                }
106:                return NOKEY;
107:            }
108:
109:            private String nextWord() throws Exception {
110:                int token = in.nextToken();
111:                if (token == in.TT_EOF) {
112:                    throw new EOFException("EOF");
113:                }
114:                if (token != in.TT_WORD) {
115:                    throw new Exception("token type");
116:                }
117:                return in.sval;
118:            }
119:
120:            private int expecting(int token1, int token2, int token3)
121:                    throws Exception {
122:                int key;
123:                key = keyword(nextWord());
124:                if (key != token1 && key != token2 && key != token3) {
125:                    throw new Exception("token value ".concat(in.sval));
126:                }
127:                return key;
128:            }
129:
130:            static private void printStringArray(String name, String val[]) {
131:                if (val == null || val.length == 0)
132:                    return;
133:                System.out.println(name);
134:                int l = val.length;
135:                for (int i = 0; i < l; i++) {
136:                    System.out.print('\t');
137:                    System.out.println(val[i]);
138:                }
139:            }
140:
141:            private void parseClass() throws Exception {
142:                String classname = null;
143:                String word = null;
144:                int keyword;
145:                int token;
146:                LinkedList methods = new LinkedList();
147:                LinkedList fields = new LinkedList();
148:                try {
149:                    // parse CLASS and classname
150:                    expecting(CLASS, -1, -1);
151:                    classname = nextWord();
152:
153:                    while (true) {
154:                        // parse FIELDS or METHODS
155:                        keyword = expecting(FIELDS, METHODS, CLASS);
156:                        LinkedList this list;
157:                        if (keyword == CLASS) {
158:                            // beginning of next class signals the end of this one.
159:                            in.pushBack();
160:                            break;
161:                        }
162:                        this list = (keyword == FIELDS) ? fields : methods;
163:                        while (true) {
164:                            String memberName = nextWord();
165:                            // see if this name is a keyword.
166:                            // since the memberNames, if properly formed,
167:                            // must contain :, there should be no danger of
168:                            // confusion.
169:                            keyword = keyword(memberName);
170:                            if (keyword != NOKEY) {
171:                                in.pushBack();
172:                                break;
173:                            }
174:                            // make sure we have our :
175:                            if (memberName.indexOf(':') == -1) {
176:                                throw new Exception("format error in "
177:                                        .concat(memberName));
178:                            }
179:                            this list.add(memberName);
180:                        }
181:                    }
182:                } finally {
183:                    if (classname != null) {
184:                        // here, using empty as a prototype for String[]
185:                        String methodstrings[] = (String[]) methods
186:                                .toArray(empty);
187:                        String fieldstrings[] = (String[]) fields
188:                                .toArray(empty);
189:                        if (verbose) {
190:                            System.out.print("CLASS ");
191:                            System.out.println(classname);
192:                            printStringArray("    FIELDS", fieldstrings);
193:                            printStringArray("    METHODS", methodstrings);
194:                        }
195:                        filter.addRestrictions(classname, fieldstrings,
196:                                methodstrings);
197:                    }
198:                }
199:            }
200:
201:            private void printExceptionInfo(Exception e, String msg) {
202:                System.err.print(fileName);
203:                System.err.print(": ");
204:                if (in != null) {
205:                    System.err.print("line ");
206:                    System.err.println(String.valueOf(in.lineno()));
207:                }
208:                System.err.print(msg);
209:                System.err.print(": ");
210:                System.err.println(e.getMessage());
211:            }
212:
213:            public void setVerbose(boolean v) {
214:                verbose = v;
215:            }
216:
217:            public MemberFilter parseFile() {
218:                if (!filter.findROMFilterData()) {
219:                    try {
220:                        while (true) {
221:                            parseClass();
222:                        }
223:                    } catch (EOFException e) {
224:                        // normal termination. do nothing
225:                    } catch (IOException e) {
226:                        printExceptionInfo(e, "IO error");
227:                        return null;
228:                    } catch (Exception e) {
229:                        printExceptionInfo(e, "syntax error");
230:                        return null;
231:                    }
232:                    filter.doneAddingRestrictions();
233:                }
234:                return filter;
235:            }
236:        }
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