org.owasp.dependencycheck.analyzer.AbstractFileTypeAnalyzer Maven / Gradle / Ivy
/*
* 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) 2014 Jeremy Long. All Rights Reserved.
*/
package org.owasp.dependencycheck.analyzer;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.File;
import java.io.FileFilter;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;
import javax.annotation.concurrent.ThreadSafe;
import org.owasp.dependencycheck.Engine;
import org.owasp.dependencycheck.exception.InitializationException;
/**
* The base FileTypeAnalyzer that all analyzers that have specific file types
* they analyze should extend.
*
* @author Jeremy Long
*/
@ThreadSafe
public abstract class AbstractFileTypeAnalyzer extends AbstractAnalyzer implements FileTypeAnalyzer {
//
/**
* The logger.
*/
private static final Logger LOGGER = LoggerFactory.getLogger(AbstractFileTypeAnalyzer.class);
/**
* Whether the file type analyzer detected any files it needs to analyze.
*/
private boolean filesMatched = false;
/**
* Set the value of filesMatched. A flag indicating whether the scan
* included any file types this analyzer supports.
*
* @param filesMatched new value of filesMatched
*/
protected void setFilesMatched(boolean filesMatched) {
this.filesMatched = filesMatched;
}
/**
* Gets the value of filesMatched. A flag indicating whether the scan
* included any file types this analyzer supports.
*
* @return the value of filesMatched
*/
protected boolean getFilesMatched() {
return this.filesMatched;
}
//
//
/**
* Initializes the analyzer.
*
* @param engine a reference to the dependency-check engine
* @throws InitializationException thrown if there is an exception during
* initialization
*/
@Override
protected final void prepareAnalyzer(Engine engine) throws InitializationException {
if (filesMatched) {
prepareFileTypeAnalyzer(engine);
} else {
this.setEnabled(false);
}
}
//
//
/**
*
* Returns the {@link java.io.FileFilter} used to determine which files are
* to be analyzed. An example would be an analyzer that inspected Java jar
* files. Implementors may use
* {@link org.owasp.dependencycheck.utils.FileFilterBuilder}.
*
* If the analyzer returns null it will not cause additional files to be
* analyzed, but will be executed against every file loaded.
*
* @return the file filter used to determine which files are to be analyzed
*/
protected abstract FileFilter getFileFilter();
/**
* Prepares the file type analyzer for dependency analysis.
*
* @param engine a reference to the dependency-check engine
* @throws InitializationException thrown if there is an exception during
* initialization
*/
protected abstract void prepareFileTypeAnalyzer(Engine engine) throws InitializationException;
//
/**
* Determines if the file can be analyzed by the analyzer.
*
* @param pathname the path to the file
* @return true if the file can be analyzed by the given analyzer; otherwise
* false
*/
@Override
public boolean accept(File pathname) {
final FileFilter filter = getFileFilter();
boolean accepted = false;
if (null == filter) {
LOGGER.error("The '{}' analyzer is misconfigured and does not have a file filter; it will be disabled", getName());
} else if (this.isEnabled()) {
accepted = filter.accept(pathname);
if (accepted) {
filesMatched = true;
}
}
return accepted;
}
/**
*
* Utility method to help in the creation of the extensions set. This
* constructs a new Set that can be used in a final static declaration.
*
* This implementation was copied from
* http://stackoverflow.com/questions/2041778/prepare-java-hashset-values-by-construction
*
* @param strings a list of strings to add to the set.
* @return a Set of strings.
*/
protected static Set newHashSet(String... strings) {
final Set set = new HashSet<>(strings.length);
Collections.addAll(set, strings);
return set;
}
}