Source Code Cross Referenced for MatcherDemoApplet.java in  » Development » Jakarta-ORO » examples » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Development » Jakarta ORO » examples 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * $Id: MatcherDemoApplet.java,v 1.5 2003/11/07 20:16:23 dfs Exp $
003:         *
004:         * ====================================================================
005:         * The Apache Software License, Version 1.1
006:         *
007:         * Copyright (c) 2000 The Apache Software Foundation.  All rights
008:         * reserved.
009:         *
010:         * Redistribution and use in source and binary forms, with or without
011:         * modification, are permitted provided that the following conditions
012:         * are met:
013:         *
014:         * 1. Redistributions of source code must retain the above copyright
015:         *    notice, this list of conditions and the following disclaimer.
016:         *
017:         * 2. Redistributions in binary form must reproduce the above copyright
018:         *    notice, this list of conditions and the following disclaimer in
019:         *    the documentation and/or other materials provided with the
020:         *    distribution.
021:         *
022:         * 3. The end-user documentation included with the redistribution,
023:         *    if any, must include the following acknowledgment:
024:         *       "This product includes software developed by the
025:         *        Apache Software Foundation (http://www.apache.org/)."
026:         *    Alternately, this acknowledgment may appear in the software itself,
027:         *    if and wherever such third-party acknowledgments normally appear.
028:         *
029:         * 4. The names "Apache" and "Apache Software Foundation", "Jakarta-Oro" 
030:         *    must not be used to endorse or promote products derived from this
031:         *    software without prior written permission. For written
032:         *    permission, please contact apache@apache.org.
033:         *
034:         * 5. Products derived from this software may not be called "Apache" 
035:         *    or "Jakarta-Oro", nor may "Apache" or "Jakarta-Oro" appear in their 
036:         *    name, without prior written permission of the Apache Software Foundation.
037:         *
038:         * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
039:         * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
040:         * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
041:         * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
042:         * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
043:         * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
044:         * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
045:         * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
046:         * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
047:         * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
048:         * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
049:         * SUCH DAMAGE.
050:         * ====================================================================
051:         *
052:         * This software consists of voluntary contributions made by many
053:         * individuals on behalf of the Apache Software Foundation.  For more
054:         * information on the Apache Software Foundation, please see
055:         * <http://www.apache.org/>.
056:         */
057:
058:        package examples;
059:
060:        import java.applet.*;
061:        import java.awt.*;
062:        import java.io.*;
063:        import java.net.*;
064:
065:        import org.apache.oro.text.*;
066:        import org.apache.oro.text.awk.*;
067:        import org.apache.oro.text.regex.*;
068:
069:        /**
070:         * This is a quickly hacked together demo of regular expression
071:         * matching with three different regular expression syntaxes.
072:         * It was originally written in JDK 1.0.2 days and hasn't changed
073:         * much.  It should be refactored into classes for a general purpose
074:         * interactive testing interface that can be run as a standalone
075:         * AWT application or embedded in an applet.
076:         * 
077:         * @version @version@
078:         */
079:        public final class MatcherDemoApplet extends Applet {
080:            static int CONTAINS_SEARCH = 0, MATCHES_SEARCH = 1;
081:            static int CASE_SENSITIVE = 0, CASE_INSENSITIVE = 1;
082:
083:            static int PERL5_EXPRESSION = 0;
084:            static int AWK_EXPRESSION = 1;
085:            static int GLOB_EXPRESSION = 2;
086:
087:            static String[] expressionType = { "Perl5 Expression:",
088:                    "AWK Expression:", "Glob Expression:" };
089:
090:            static int[] CASE_MASK[] = {
091:                    { Perl5Compiler.DEFAULT_MASK,
092:                            Perl5Compiler.CASE_INSENSITIVE_MASK },
093:                    { AwkCompiler.DEFAULT_MASK,
094:                            AwkCompiler.CASE_INSENSITIVE_MASK },
095:                    { GlobCompiler.DEFAULT_MASK,
096:                            GlobCompiler.CASE_INSENSITIVE_MASK } };
097:
098:            TextField expressionField;
099:            Label resultLabel, inputLabel;
100:            TextArea resultArea, inputArea;
101:            Choice expressionChoice, searchChoice, caseChoice;
102:            Button searchButton, resetButton;
103:            PatternCompiler compiler[];
104:            PatternMatcher matcher[];
105:
106:            public MatcherDemoApplet() {
107:                setFont(new Font("Helvetica", Font.PLAIN, 14));
108:                setBackground(new Color(210, 180, 140));
109:
110:                expressionChoice = new Choice();
111:
112:                for (int i = 0; i < expressionType.length; ++i)
113:                    expressionChoice.addItem(expressionType[i]);
114:
115:                compiler = new PatternCompiler[expressionType.length];
116:                matcher = new PatternMatcher[expressionType.length];
117:
118:                compiler[PERL5_EXPRESSION] = new Perl5Compiler();
119:                matcher[PERL5_EXPRESSION] = new Perl5Matcher();
120:
121:                compiler[AWK_EXPRESSION] = new AwkCompiler();
122:                matcher[AWK_EXPRESSION] = new AwkMatcher();
123:
124:                compiler[GLOB_EXPRESSION] = new GlobCompiler();
125:                matcher[GLOB_EXPRESSION] = matcher[PERL5_EXPRESSION];
126:
127:                expressionField = new TextField(10);
128:
129:                searchChoice = new Choice();
130:                searchChoice.addItem("contains()");
131:                searchChoice.addItem("matches()");
132:                caseChoice = new Choice();
133:                caseChoice.addItem("Case Sensitive");
134:                caseChoice.addItem("Case Insensitive");
135:                searchButton = new Button("Search");
136:                resetButton = new Button("Reset");
137:
138:                resultArea = new TextArea(20, 80);
139:                inputArea = new TextArea(5, 80);
140:                inputLabel = new Label("Search Input", Label.CENTER);
141:                resultLabel = new Label("Search Results", Label.CENTER);
142:                resultArea.setEditable(false);
143:            }
144:
145:            public void init() {
146:                String param;
147:                GridBagLayout layout;
148:                GridBagConstraints constraints;
149:
150:                if ((param = getParameter("background")) != null) {
151:                    try {
152:                        setBackground(new Color(Integer.parseInt(param, 16)));
153:                    } catch (NumberFormatException e) {
154:                        // do nothing, don't set color
155:                    }
156:                }
157:
158:                if ((param = getParameter("fontSize")) != null) {
159:                    Font font;
160:
161:                    font = getFont();
162:
163:                    try {
164:                        setFont(new Font(font.getFamily(), font.getStyle(),
165:                                Integer.parseInt(param)));
166:                    } catch (NumberFormatException e) {
167:                        // do nothing, don't set font size
168:                    }
169:                }
170:
171:                setLayout(layout = new GridBagLayout());
172:
173:                constraints = new GridBagConstraints();
174:                constraints.fill = GridBagConstraints.HORIZONTAL;
175:                constraints.anchor = GridBagConstraints.EAST;
176:                layout.setConstraints(expressionChoice, constraints);
177:                add(expressionChoice);
178:
179:                constraints.weightx = 1.0;
180:                constraints.anchor = GridBagConstraints.WEST;
181:                constraints.gridwidth = GridBagConstraints.REMAINDER;
182:                layout.setConstraints(expressionField, constraints);
183:                add(expressionField);
184:
185:                constraints.gridwidth = 1;
186:                layout.setConstraints(searchChoice, constraints);
187:                add(searchChoice);
188:
189:                layout.setConstraints(caseChoice, constraints);
190:                add(caseChoice);
191:
192:                layout.setConstraints(searchButton, constraints);
193:                add(searchButton);
194:
195:                constraints.gridwidth = GridBagConstraints.REMAINDER;
196:                layout.setConstraints(resetButton, constraints);
197:                add(resetButton);
198:
199:                constraints.gridwidth = GridBagConstraints.REMAINDER;
200:                layout.setConstraints(inputLabel, constraints);
201:                add(inputLabel);
202:
203:                constraints.gridwidth = GridBagConstraints.REMAINDER;
204:                constraints.fill = GridBagConstraints.BOTH;
205:                constraints.weighty = 0.25;
206:                layout.setConstraints(inputArea, constraints);
207:                add(inputArea);
208:
209:                constraints.weighty = 0.0;
210:                constraints.fill = GridBagConstraints.HORIZONTAL;
211:                layout.setConstraints(resultLabel, constraints);
212:                add(resultLabel);
213:
214:                constraints.weighty = 1.0;
215:                constraints.fill = GridBagConstraints.BOTH;
216:                constraints.gridheight = GridBagConstraints.REMAINDER;
217:                layout.setConstraints(resultArea, constraints);
218:                add(resultArea);
219:            }
220:
221:            public void search() {
222:                int matchNum, group, caseMask, exprChoice, search;
223:                String text;
224:                MatchResult result;
225:                Pattern pattern;
226:                PatternMatcherInput input;
227:
228:                resultArea.setText("");
229:                text = expressionField.getText();
230:                exprChoice = expressionChoice.getSelectedIndex();
231:                caseMask = CASE_MASK[exprChoice][caseChoice.getSelectedIndex()];
232:
233:                resultArea.appendText("Compiling regular expression.\n");
234:
235:                try {
236:                    pattern = compiler[exprChoice].compile(text, caseMask);
237:                } catch (MalformedPatternException e) {
238:                    resultArea.appendText("\nMalformed Regular Expression:\n"
239:                            + e.getMessage());
240:                    return;
241:                }
242:
243:                search = searchChoice.getSelectedIndex();
244:                text = inputArea.getText();
245:                matchNum = 0;
246:
247:                resultArea.appendText("\nSearching\n\n");
248:
249:                if (search == MATCHES_SEARCH) {
250:                    if (matcher[exprChoice].matches(text, pattern))
251:                        resultArea.appendText("The input IS an EXACT match.\n");
252:                    else
253:                        resultArea
254:                                .appendText("The input IS NOT an EXACT match.\n");
255:                } else {
256:                    input = new PatternMatcherInput(text);
257:
258:                    while (matcher[exprChoice].contains(input, pattern)) {
259:                        int groups;
260:
261:                        result = matcher[exprChoice].getMatch();
262:                        ++matchNum;
263:
264:                        resultArea.appendText("Match " + matchNum + ": "
265:                                + result.group(0) + "\n");
266:                        groups = result.groups();
267:
268:                        if (groups > 1) {
269:                            resultArea.appendText("    Subgroups:\n");
270:                            for (group = 1; group < groups; group++) {
271:                                resultArea.appendText("    " + group + ": "
272:                                        + result.group(group) + "\n");
273:                            }
274:                        }
275:                    }
276:
277:                    resultArea.appendText("\nThe input contained " + matchNum
278:                            + " matches.");
279:                }
280:
281:            }
282:
283:            public boolean action(Event event, Object arg) {
284:                if (event.target == searchButton) {
285:                    search();
286:                    return true;
287:                } else if (event.target == resetButton) {
288:                    resultArea.setText("");
289:                    inputArea.setText("");
290:                    expressionField.setText("");
291:                    return true;
292:                }
293:
294:                return false;
295:            }
296:        }
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