Source Code Cross Referenced for LinkPredicateEditor.java in  » Web-Crawler » WebSPHINX » websphinx » workbench » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Web Crawler » WebSPHINX » websphinx.workbench 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * WebSphinx web-crawling toolkit
003:         *
004:         * Copyright (c) 1998-2002 Carnegie Mellon University.  All rights
005:         * reserved.
006:         *
007:         * Redistribution and use in source and binary forms, with or without
008:         * modification, are permitted provided that the following conditions
009:         * are met:
010:         *
011:         * 1. Redistributions of source code must retain the above copyright
012:         *    notice, this list of conditions and the following disclaimer.
013:         *
014:         * 2. Redistributions in binary form must reproduce the above copyright
015:         *    notice, this list of conditions and the following disclaimer in
016:         *    the documentation and/or other materials provided with the
017:         *    distribution.
018:         *
019:         * THIS SOFTWARE IS PROVIDED BY CARNEGIE MELLON UNIVERSITY ``AS IS'' AND
020:         * ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
021:         * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
022:         * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY
023:         * NOR ITS EMPLOYEES BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
024:         * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
025:         * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
026:         * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
027:         * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
028:         * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
029:         * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
030:         *
031:         */
032:
033:        package websphinx.workbench;
034:
035:        import java.awt.*;
036:        import websphinx.*;
037:        import rcm.awt.Constrain;
038:
039:        public class LinkPredicateEditor extends Panel { // FIX: consider implementing java.beans.PropertyEditor
040:
041:            LinkFeatureChoice choice;
042:
043:            /**
044:             * Make a LinkPredicateEditor.
045:             */
046:            public LinkPredicateEditor() {
047:                setLayout(new GridBagLayout());
048:                choice = new LinkFeatureChoice();
049:                Constrain.add(this , choice, Constrain.labelLike(0, 0));
050:                Constrain.add(this , choice.getArgs(), Constrain.areaLike(0, 1));
051:                setLinkPredicate(null);
052:            }
053:
054:            public void setLinkPredicate(LinkPredicate pred) {
055:                choice.setLinkPredicate(pred);
056:            }
057:
058:            public LinkPredicate getLinkPredicate() {
059:                return choice.getLinkPredicate();
060:            }
061:
062:        }
063:
064:        class LinkFeatureChoice extends FeatureChoice {
065:            LinkFeatureArgs args = new LinkFeatureArgs();
066:
067:            final static String NULL_FEATURE = "all links";
068:            final static String URL_FEATURE = "URL";
069:            final static String HTML_FEATURE = "HTML tag";
070:            final static String TEXT_FEATURE = "anchor text";
071:            final static String LABEL_FEATURE = "labels";
072:            final static String SCRIPT_FEATURE = "script";
073:
074:            public LinkFeatureChoice() {
075:                addItem(NULL_FEATURE);
076:                addItem(LABEL_FEATURE);
077:                addItem(URL_FEATURE);
078:                addItem(TEXT_FEATURE);
079:                addItem(HTML_FEATURE);
080:                addItem(SCRIPT_FEATURE);
081:            }
082:
083:            public Panel getArgs() {
084:                return args;
085:            }
086:
087:            public void setLinkPredicate(LinkPredicate pred) {
088:                LinkPredicate neg = null;
089:                if (pred instanceof  DualPredicate) {
090:                    neg = (LinkPredicate) ((DualPredicate) pred)
091:                            .getNegativePredicate();
092:                    pred = (LinkPredicate) ((DualPredicate) pred)
093:                            .getPositivePredicate();
094:                }
095:
096:                if (pred == null) {
097:                    select(NULL_FEATURE);
098:                } else if (pred instanceof  URLPredicate) {
099:                    URLPredicate urlpred = (URLPredicate) pred;
100:                    URLPredicate urlneg = (URLPredicate) neg;
101:                    select(URL_FEATURE);
102:                    args.setURLPattern(urlpred.getPattern().toString());
103:                    args.setURLNegPattern(urlneg != null ? urlneg.getPattern()
104:                            .toString() : "");
105:                } else if (pred instanceof  ContentPredicate) {
106:                    ContentPredicate contpred = (ContentPredicate) pred;
107:                    ContentPredicate contneg = (ContentPredicate) neg;
108:                    if (contpred.getOverHTML()) {
109:                        select(HTML_FEATURE);
110:                        args.setHTMLPattern(contpred.getPattern().toString());
111:                        args.setHTMLNegPattern(contneg != null ? contneg
112:                                .getPattern().toString() : "");
113:                    } else {
114:                        select(TEXT_FEATURE);
115:                        args.setTextPattern(contpred.getPattern().toString());
116:                        args.setTextNegPattern(contneg != null ? contneg
117:                                .getPattern().toString() : "");
118:                    }
119:                } else if (pred instanceof  LabelPredicate) {
120:                    LabelPredicate labelpred = (LabelPredicate) pred;
121:                    select(LABEL_FEATURE);
122:                    args.setOrTerms(labelpred.getOrTerms());
123:                    args.setLabels(labelpred.getLabels());
124:                } else if (pred instanceof  Script) {
125:                    Script script = (Script) pred;
126:                    select(SCRIPT_FEATURE);
127:                    args.setScript(script.getScript());
128:                } else {
129:                    select(NULL_FEATURE);
130:                }
131:            }
132:
133:            public LinkPredicate getLinkPredicate() {
134:                String feat = getSelectedItem();
135:                if (feat.equals(URL_FEATURE))
136:                    return makeSingleOrDual(new URLPredicate(new Wildcard(args
137:                            .getURLPattern())), args.getURLNegPattern()
138:                            .length() == 0 ? null : new URLPredicate(
139:                            new Wildcard(args.getURLNegPattern())));
140:                else if (feat.equals(HTML_FEATURE))
141:                    return makeSingleOrDual(new ContentPredicate(new Tagexp(
142:                            args.getHTMLPattern()), true), args
143:                            .getHTMLNegPattern().length() == 0 ? null
144:                            : new ContentPredicate(new Tagexp(args
145:                                    .getHTMLNegPattern()), true));
146:                else if (feat.equals(TEXT_FEATURE))
147:                    return makeSingleOrDual(new ContentPredicate(new Regexp(
148:                            args.getTextPattern()), false), args
149:                            .getTextNegPattern().length() == 0 ? null
150:                            : new ContentPredicate(new Regexp(args
151:                                    .getTextNegPattern()), false));
152:                else if (feat.equals(LABEL_FEATURE))
153:                    return new LabelPredicate(args.getLabels(), args
154:                            .getOrTerms());
155:                else if (feat.equals(SCRIPT_FEATURE))
156:                    return new Script(args.getScript(), true);
157:                else
158:                    return null;
159:            }
160:
161:            private static LinkPredicate makeSingleOrDual(
162:                    LinkPredicate positive, LinkPredicate negative) {
163:                return negative == null ? positive : new DualPredicate(
164:                        positive, negative);
165:            }
166:        }
167:
168:        class LinkFeatureArgs extends Panel {
169:
170:            final static String ANY_TERMS = "any";
171:            final static String ALL_TERMS = "all";
172:
173:            TextField urlPattern;
174:            TextField urlNegPattern;
175:            TextField textPattern;
176:            TextField textNegPattern;
177:            TextField htmlPattern;
178:            TextField htmlNegPattern;
179:            TextField labels;
180:            Choice orTerms;
181:            TextArea script;
182:
183:            public LinkFeatureArgs() {
184:                Panel panel;
185:
186:                setLayout(new CardLayout());
187:
188:                add(LinkFeatureChoice.NULL_FEATURE, panel = new Panel());
189:
190:                add(LinkFeatureChoice.URL_FEATURE, panel = Constrain
191:                        .makeConstrainedPanel(1, 4));
192:                Constrain.add(panel, new Label(
193:                        " matches the wildcard expression "), Constrain
194:                        .labelLike(0, 0));
195:                Constrain.add(panel, urlPattern = new TextField(), Constrain
196:                        .fieldLike(0, 1));
197:                Constrain.add(panel, new Label(" but not the expression "),
198:                        Constrain.labelLike(0, 2));
199:                Constrain.add(panel, urlNegPattern = new TextField(), Constrain
200:                        .fieldLike(0, 3));
201:
202:                add(LinkFeatureChoice.HTML_FEATURE, panel = Constrain
203:                        .makeConstrainedPanel(1, 4));
204:                Constrain.add(panel, new Label(
205:                        " matches the HTML tag expression "), Constrain
206:                        .labelLike(0, 0));
207:                Constrain.add(panel, htmlPattern = new TextField(), Constrain
208:                        .fieldLike(0, 1));
209:                Constrain.add(panel, new Label(" but not the expression "),
210:                        Constrain.labelLike(0, 2));
211:                Constrain.add(panel, htmlNegPattern = new TextField(),
212:                        Constrain.fieldLike(0, 3));
213:
214:                add(LinkFeatureChoice.TEXT_FEATURE, panel = Constrain
215:                        .makeConstrainedPanel(1, 4));
216:                Constrain.add(panel, new Label(
217:                        " matches the regular expression "), Constrain
218:                        .labelLike(0, 0));
219:                Constrain.add(panel, textPattern = new TextField(), Constrain
220:                        .fieldLike(0, 1));
221:                Constrain.add(panel, new Label(" but not the expression "),
222:                        Constrain.labelLike(0, 2));
223:                Constrain.add(panel, textNegPattern = new TextField(),
224:                        Constrain.fieldLike(0, 3));
225:
226:                add(LinkFeatureChoice.LABEL_FEATURE, panel = Constrain
227:                        .makeConstrainedPanel(3, 2));
228:                Constrain.add(panel, new Label(" include "), Constrain
229:                        .labelLike(0, 0));
230:                Constrain.add(panel, orTerms = new Choice(), Constrain
231:                        .labelLike(1, 0));
232:                orTerms.addItem(ANY_TERMS);
233:                orTerms.addItem(ALL_TERMS);
234:                orTerms.select(ANY_TERMS);
235:                Constrain.add(panel, new Label(" of the labels "), Constrain
236:                        .labelLike(2, 0));
237:                Constrain.add(panel, labels = new TextField(), Constrain
238:                        .fieldLike(0, 1, 3));
239:
240:                ScriptInterpreter interp = Context.getScriptInterpreter();
241:                if (interp != null) {
242:                    add(LinkFeatureChoice.SCRIPT_FEATURE, panel = Constrain
243:                            .makeConstrainedPanel(1, 2));
244:                    Constrain.add(panel, new Label(interp.getLanguage()
245:                            + " Function (crawler, link)"), Constrain
246:                            .labelLike(0, 0));
247:                    Constrain.add(panel,
248:                            script = new TextArea("return true;\n"), Constrain
249:                                    .areaLike(0, 1));
250:                } else {
251:                    add(LinkFeatureChoice.SCRIPT_FEATURE, panel = Constrain
252:                            .makeConstrainedPanel(1, 1));
253:                    Constrain.add(panel, new Label(
254:                            "No scripting language is available."), Constrain
255:                            .labelLike(0, 0));
256:                }
257:            }
258:
259:            public void setURLPattern(String pattern) {
260:                urlPattern.setText(pattern);
261:            }
262:
263:            public String getURLPattern() {
264:                return urlPattern.getText();
265:            }
266:
267:            public void setURLNegPattern(String pattern) {
268:                urlNegPattern.setText(pattern);
269:            }
270:
271:            public String getURLNegPattern() {
272:                return urlNegPattern.getText();
273:            }
274:
275:            public void setTextPattern(String pattern) {
276:                textPattern.setText(pattern);
277:            }
278:
279:            public String getTextPattern() {
280:                return textPattern.getText();
281:            }
282:
283:            public void setTextNegPattern(String pattern) {
284:                textNegPattern.setText(pattern);
285:            }
286:
287:            public String getTextNegPattern() {
288:                return textNegPattern.getText();
289:            }
290:
291:            public void setHTMLPattern(String pattern) {
292:                htmlPattern.setText(pattern);
293:            }
294:
295:            public String getHTMLPattern() {
296:                return htmlPattern.getText();
297:            }
298:
299:            public void setHTMLNegPattern(String pattern) {
300:                htmlNegPattern.setText(pattern);
301:            }
302:
303:            public String getHTMLNegPattern() {
304:                return htmlNegPattern.getText();
305:            }
306:
307:            public void setLabels(String pattern) {
308:                labels.setText(pattern);
309:            }
310:
311:            public String getLabels() {
312:                return labels.getText();
313:            }
314:
315:            public void setOrTerms(boolean orTerms) {
316:                this .orTerms.select(orTerms ? ANY_TERMS : ALL_TERMS);
317:            }
318:
319:            public boolean getOrTerms() {
320:                return orTerms.getSelectedItem().equals(ANY_TERMS);
321:            }
322:
323:            public void setScript(String script) {
324:                this .script.setText(script);
325:            }
326:
327:            public String getScript() {
328:                return script != null ? script.getText() : null;
329:            }
330:
331:        }
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