/*

  * This file is part of dependency-check-core.

  *

  * Licensed under the Apache License, Version 2.0 (the "License");

  * you may not use this file except in compliance with the License.

  * You may obtain a copy of the License at

  *

  *     http://www.apache.org/licenses/LICENSE-2.0

  *

  * Unless required by applicable law or agreed to in writing, software

  * distributed under the License is distributed on an "AS IS" BASIS,

  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

  * See the License for the specific language governing permissions and

  * limitations under the License.

  *

  * Copyright (c) 2012 Jeremy Long. All Rights Reserved.

  */

 package org.owasp.dependencycheck.analyzer;

 import java.io.File;

 import java.util.Set;

 import org.owasp.dependencycheck.Engine;

 import org.owasp.dependencycheck.dependency.Confidence;

 import org.owasp.dependencycheck.dependency.Dependency;

 import org.owasp.dependencycheck.utils.DependencyVersion;

 import org.owasp.dependencycheck.utils.DependencyVersionUtil;

 /**

  *

  * Takes a dependency and analyzes the filename and determines the hashes.

  *

  * @author Jeremy Long <jeremy.long@owasp.org>

  */

 public class FileNameAnalyzer extends AbstractAnalyzer implements Analyzer {

     //<editor-fold defaultstate="collapsed" desc="All standard implmentation details of Analyzer">

     /**

      * The name of the analyzer.

      */

     private static final String ANALYZER_NAME = "File Name Analyzer";

     /**

      * The phase that this analyzer is intended to run in.

      */

     private static final AnalysisPhase ANALYSIS_PHASE = AnalysisPhase.INFORMATION_COLLECTION;

     /**

      * The set of file extensions supported by this analyzer.

      */

     private static final Set<String> EXTENSIONS = null;

     /**

      * Returns a list of file EXTENSIONS supported by this analyzer.

      *

      * @return a list of file EXTENSIONS supported by this analyzer.

      */

     public Set<String> getSupportedExtensions() {

         return EXTENSIONS;

     }

     /**

      * Returns the name of the analyzer.

      *

      * @return the name of the analyzer.

      */

     public String getName() {

         return ANALYZER_NAME;

     }

     /**

      * Returns whether or not this analyzer can process the given extension.

      *

      * @param extension the file extension to test for support.

      * @return whether or not the specified file extension is supported by this analyzer.

      */

     public boolean supportsExtension(String extension) {

         return true;

     }

     /**

      * Returns the phase that the analyzer is intended to run in.

      *

      * @return the phase that the analyzer is intended to run in.

      */

     public AnalysisPhase getAnalysisPhase() {

         return ANALYSIS_PHASE;

     }

     //</editor-fold>

     /**

      * Collects information about the file name.

      *

      * @param dependency the dependency to analyze.

      * @param engine the engine that is scanning the dependencies

      * @throws AnalysisException is thrown if there is an error reading the JAR file.

      */

     @Override

     public void analyze(Dependency dependency, Engine engine) throws AnalysisException {

         //strip any path information that may get added by ArchiveAnalyzer, etc.

         final File f = new File(dependency.getFileName());

         String fileName = f.getName();

         //remove file extension

         final int pos = fileName.lastIndexOf(".");

         if (pos > 0) {

             fileName = fileName.substring(0, pos);

         }

         //add version evidence

         final DependencyVersion version = DependencyVersionUtil.parseVersion(fileName);

         if (version != null) {

             // If the version number is just a number like 2 or 23, reduce the confidence

             // a shade. This should hopefully correct for cases like log4j.jar or

             // struts2-core.jar

             if (version.getVersionParts() == null || version.getVersionParts().size() < 2) {

                 dependency.getVersionEvidence().addEvidence("file", "name",

                         version.toString(), Confidence.MEDIUM);

             } else {

                 dependency.getVersionEvidence().addEvidence("file", "name",

                         version.toString(), Confidence.HIGHEST);

             }

             dependency.getVersionEvidence().addEvidence("file", "name",

                     fileName, Confidence.MEDIUM);

         }

         //add as vendor and product evidence

         if (fileName.contains("-")) {

             dependency.getProductEvidence().addEvidence("file", "name",

                     fileName, Confidence.HIGHEST);

             dependency.getVendorEvidence().addEvidence("file", "name",

                     fileName, Confidence.HIGHEST);

         } else {

             dependency.getProductEvidence().addEvidence("file", "name",

                     fileName, Confidence.HIGH);

             dependency.getVendorEvidence().addEvidence("file", "name",

                     fileName, Confidence.HIGH);

         }

     }

 }