added UrlTokenizingFilter

Former-commit-id: 6868a5b16e8d44f8761028278b6c292f98f53a7b

src/main/java/org/owasp/dependencycheck/data/lucene/UrlTokenizingFilter.java

@@ -0,0 +1,85 @@
+/*
+ * This file is part of Dependency-Check.
+ *
+ * Dependency-Check is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation, either version 3 of the License, or (at your option) any
+ * later version.
+ *
+ * Dependency-Check is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * Dependency-Check. If not, see http://www.gnu.org/licenses/.
+ *
+ * Copyright (c) 2013 Jeremy Long. All Rights Reserved.
+ */
+package org.owasp.dependencycheck.data.lucene;
+
+import java.io.IOException;
+import java.net.MalformedURLException;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+import org.apache.lucene.analysis.TokenStream;
+import org.apache.lucene.analysis.tokenattributes.CharTermAttribute;
+import org.owasp.dependencycheck.utils.UrlStringUtils;
+
+/**
+ * <p>Takes a TokenStream and splits or adds tokens to correctly index version
+ * numbers.</p>
+ * <p><b>Example:</b> "3.0.0.RELEASE" -> "3 3.0 3.0.0 RELEASE
+ * 3.0.0.RELEASE".</p>
+ *
+ * @author Jeremy Long (jeremy.long@owasp.org)
+ */
+public final class UrlTokenizingFilter extends AbstractTokenizingFilter {
+
+    /**
+     * Constructs a new VersionTokenizingFilter.
+     *
+     * @param stream the TokenStream that this filter will process
+     */
+    public UrlTokenizingFilter(TokenStream stream) {
+        super(stream);
+    }
+
+    /**
+     * Increments the underlying TokenStream and sets CharTermAttributes to
+     * construct an expanded set of tokens by concatenating tokens with the
+     * previous token.
+     *
+     * @return whether or not we have hit the end of the TokenStream
+     * @throws IOException is thrown when an IOException occurs
+     */
+    @Override
+    public boolean incrementToken() throws IOException {
+        final LinkedList<String> tokens = getTokens();
+        final CharTermAttribute termAtt = getTermAtt();
+        if (tokens.size() == 0 && input.incrementToken()) {
+            final String text = new String(termAtt.buffer(), 0, termAtt.length());
+            if (UrlStringUtils.containsUrl(text)) {
+                final String[] parts = text.split("\\s");
+                for (String part : parts) {
+                    if (UrlStringUtils.isUrl(part)) {
+                        try {
+                            final List<String> data = UrlStringUtils.extractImportantUrlData(part);
+                            tokens.addAll(data);
+                        } catch (MalformedURLException ex) {
+                            Logger.getLogger(UrlTokenizingFilter.class.getName()).log(Level.INFO, "error parsing " + part, ex);
+                            tokens.add(part);
+                        }
+                    } else {
+                        tokens.add(part);
+                    }
+                }
+            } else {
+                tokens.add(text);
+            }
+        }
+        return addTerm();
+    }
+}