project.java

一个查找java程序里bug的程序的源代码,该程序本身也是java写的,对提高java编程水平很有用

/*
 * FindBugs - Find bugs in Java programs
 * Copyright (C) 2003,2004 University of Maryland
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 * 
 * This library 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
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

/*
 * Project.java
 *
 * Created on March 30, 2003, 2:22 PM
 */

package edu.umd.cs.findbugs;

import edu.umd.cs.findbugs.xml.XMLOutput;
import edu.umd.cs.findbugs.xml.XMLOutputUtil;
import edu.umd.cs.findbugs.xml.XMLWriteable;

import java.io.*;
import java.net.URL;
import java.net.MalformedURLException;
import java.util.*;
import java.util.jar.*;

import org.dom4j.DocumentException;
import org.dom4j.Element;

/**
 * A project in the GUI.
 * This consists of some number of Jar files to analyze for bugs, and optionally
 * <p/>
 * <ul>
 * <li> some number of source directories, for locating the program's
 * source code
 * <li> some number of auxiliary classpath entries, for locating classes
 * referenced by the program which the user doesn't want to analyze
 * <li> some number of boolean options
 * </ul>
 *
 * @author David Hovemeyer
 */
public class Project implements XMLWriteable {
	private static final boolean DEBUG = Boolean.getBoolean("findbugs.project.debug");

	/**
	 * Project filename.
	 */
	private String projectFileName;

	/**
	 * Options.
	 */
	private Map<String, Boolean> optionsMap;

	/**
	 * The list of project files.
	 */
	private LinkedList<String> fileList;

	/**
	 * The list of source directories.
	 */
	private LinkedList<String> srcDirList;

	/**
	 * The list of auxiliary classpath entries.
	 */
	private LinkedList<String> auxClasspathEntryList;

	/**
	 * Flag to indicate that this Project has been modified.
	 */
	private boolean isModified;

	/**
	 * Constant used to name anonymous projects.
	 */
	public static final String UNNAMED_PROJECT = "<<unnamed project>>";

	/**
	 * Create an anonymous project.
	 */
	public Project() {
		this.projectFileName = UNNAMED_PROJECT;
		optionsMap = new HashMap<String, Boolean>();
		optionsMap.put(RELATIVE_PATHS, Boolean.FALSE);
		fileList = new LinkedList<String>();
		srcDirList = new LinkedList<String>();
		auxClasspathEntryList = new LinkedList<String>();
		isModified = false;
	}

	/**
	 * Return an exact copy of this Project.
	 */
	public Project duplicate() {
		Project dup = new Project();
		dup.projectFileName = this.projectFileName;
		dup.optionsMap.putAll(this.optionsMap);
		dup.fileList.addAll(this.fileList);
		dup.srcDirList.addAll(this.srcDirList);
		dup.auxClasspathEntryList.addAll(this.auxClasspathEntryList);

		return dup;
	}

	/**
	 * Return whether or not this Project has unsaved modifications.
	 */
	public boolean isModified() {
		return isModified;
	}

	/**
	 * Set whether or not this Project has unsaved modifications.
	 */
	public void setModified(boolean isModified) {
		this.isModified = isModified;
	}

	/**
	 * Get the project filename.
	 */
	public String getProjectFileName() {
		return projectFileName;
	}

	/**
	 * Set the project filename.
	 *
	 * @param projectFileName the new filename
	 */
	public void setProjectFileName(String projectFileName) {
		this.projectFileName = projectFileName;
	}

	/**
	 * Add a file to the project.
	 *
	 * @param fileName the file to add
	 * @return true if the file was added, or false if the
	 *         file was already present
	 */
	public boolean addFile(String fileName) {
		return addToListInternal(fileList, makeAbsoluteCWD(fileName));
	}

	/**
	 * Add a source directory to the project.
	 * @param dirName the directory to add
	 * @return true if the source directory was added, or false if the
	 *   source directory was already present
	 */
	public boolean addSourceDir(String dirName) {
		return addToListInternal(srcDirList, makeAbsoluteCWD(dirName));
	}

	/**
	 * Retrieve the Options value.
	 *
	 * @param option the name of option to get
	 * @return the value of the option
	 */
	public boolean getOption(String option) {
		Boolean value = optionsMap.get(option);
		return value != null && value.booleanValue();
	}

	/**
	 * Get the number of files in the project.
	 *
	 * @return the number of files in the project
	 */
	public int getFileCount() {
		return fileList.size();
	}

	/**
	 * Get the given file in the list of project files.
	 *
	 * @param num the number of the file in the list of project files
	 * @return the name of the file
	 */
	public String getFile(int num) {
		return fileList.get(num);
	}

	/**
	 * Remove file at the given index in the list of project files
	 *
	 * @param num index of the file to remove in the list of project files
	 */
	public void removeFile(int num) {
		fileList.remove(num);
		isModified = true;
	}

	/**
	 * Get the list of files, directories, and zip files in the project.
	 */
	public List<String> getFileList() {
		return fileList;
	}

	/**
	 * Get the number of source directories in the project.
	 *
	 * @return the number of source directories in the project
	 */
	public int getNumSourceDirs() {
		return srcDirList.size();
	}

	/**
	 * Get the given source directory.
	 *
	 * @param num the number of the source directory
	 * @return the source directory
	 */
	public String getSourceDir(int num) {
		return srcDirList.get(num);
	}

	/**
	 * Remove source directory at given index.
	 *
	 * @param num index of the source directory to remove
	 */
	public void removeSourceDir(int num) {
		srcDirList.remove(num);
		isModified = true;
	}

	/**
	 * Get project files as an array of Strings.
	 */
	public String[] getFileArray() {
		return (String[]) fileList.toArray(new String[fileList.size()]);
	}

	/**
	 * Get source dirs as an array of Strings.
	 */
	public String[] getSourceDirArray() {
		return (String[]) srcDirList.toArray(new String[srcDirList.size()]);
	}

	/**
	 * Get the source dir list.
	 */
	public List<String> getSourceDirList() {
		return srcDirList;
	}

	/**
	 * Add an auxiliary classpath entry
	 *
	 * @param auxClasspathEntry the entry
	 * @return true if the entry was added successfully, or false
	 *         if the given entry is already in the list
	 */
	public boolean addAuxClasspathEntry(String auxClasspathEntry) {
		return addToListInternal(auxClasspathEntryList, makeAbsoluteCWD(auxClasspathEntry));
	}

	/**
	 * Get the number of auxiliary classpath entries.
	 */
	public int getNumAuxClasspathEntries() {
		return auxClasspathEntryList.size();
	}

	/**
	 * Get the n'th auxiliary classpath entry.
	 */
	public String getAuxClasspathEntry(int n) {
		return auxClasspathEntryList.get(n);
	}

	/**
	 * Remove the n'th auxiliary classpath entry.
	 */
	public void removeAuxClasspathEntry(int n) {
		auxClasspathEntryList.remove(n);
		isModified = true;
	}

	/**
	 * Return the list of aux classpath entries.
	 */
	public List<String> getAuxClasspathEntryList() {
		return auxClasspathEntryList;
	}

	/**
	 * Worklist item for finding implicit classpath entries.
	 */
	private static class WorkListItem {
		private URL url;

		/**
		 * Constructor.
		 *
		 * @param url the URL of the Jar or Zip file
		 */
		public WorkListItem(URL url) {
			this.url = url;
		}

		/**
		 * Get URL of Jar/Zip file.
		 */
		public URL getURL() {
			return this.url;
		}
	}

	/**
	 * Worklist for finding implicit classpath entries.
	 */
	private static class WorkList {
		private LinkedList<WorkListItem> itemList;
		private HashSet<String> addedSet;

		/**
		 * Constructor.
		 * Creates an empty worklist.
		 */
		public WorkList() {
			this.itemList = new LinkedList<WorkListItem>();
			this.addedSet = new HashSet<String>();
		}

		/**
		 * Create a URL from a filename specified in the project file.
		 */
		public URL createURL(String fileName) throws MalformedURLException {
			String protocol = FindBugs.getURLProtocol(fileName);
			if (protocol == null) {
				fileName = "file:" + fileName;
			}
			return new URL(fileName);
		}

		/**
		 * Create a URL of a file relative to another URL.
		 */
		public URL createRelativeURL(URL base, String fileName) throws MalformedURLException {
			return new URL(base, fileName);
		}

		/**
		 * Add a worklist item.
		 *
		 * @param item the WorkListItem representing a zip/jar file to be examined
		 * @return true if the item was added, false if not (because it was
		 *         examined already)
		 */
		public boolean add(WorkListItem item) {
			if (DEBUG) System.out.println("Adding " + item.getURL().toString());
			if (!addedSet.add(item.getURL().toString())) {
				if (DEBUG) System.out.println("\t==> Already processed");
				return false;
			}

			itemList.add(item);
			return true;
		}

		/**
		 * Return whether or not the worklist is empty.
		 */
		public boolean isEmpty() {
			return itemList.isEmpty();
		}

		/**
		 * Get the next item in the worklist.
		 */
		public WorkListItem getNextItem() {
			return itemList.removeFirst();
		}
	}

	/**
	 * Return the list of implicit classpath entries.  The implicit
	 * classpath is computed from the closure of the set of jar files
	 * that are referenced by the <code>"Class-Path"</code> attribute
	 * of the manifest of the any jar file that is part of this project
	 * or by the <code>"Class-Path"</code> attribute of any directly or
	 * indirectly referenced jar.  The referenced jar files that exist
	 * are the list of implicit classpath entries.
	 */
	public List<String> getImplicitClasspathEntryList() {
		final LinkedList<String> implicitClasspath = new LinkedList<String>();
		WorkList workList = new WorkList();

		// Prime the worklist by adding the zip/jar files
		// in the project.
		for (Iterator<String> i = fileList.iterator(); i.hasNext();) {
			String fileName = i.next();

			try {