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/*
* Created on Jul 8, 2005 by @author Tom Jacobs
*
*/
package tjacobs.io;
import java.io.File;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import java.util.Observable;
import java.util.Observer;
import java.util.Set;
import java.util.TreeSet;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
//import tjacobs.util.Observable;
/**
* Find is pretty groovy. The point of it is to find files ala windows search.
* doesn't have the advanced search options tho.
*
* Extends Observable so all you need to do is add an observer to it.
*/
public class Find extends Observable implements Runnable {
private Thread mMyThread;
private Pattern mPattern;
private String mDirContains;
private File mStartDir;
private boolean mDescOnly = false;
private List mMatches = new ArrayList();
private List mDirectoriesToSearch = new ArrayList();
private Set mDirectoriesSearched = new TreeSet();
private boolean mStop;
private boolean mPause;
public static final boolean DEBUG = false;
Find(Pattern pattern, File dir, boolean desc) {
super();
mPattern = pattern;
mStartDir = dir;
mDescOnly = desc;
}
public int size() {
return mMatches.size();
}
public File get(int i) {
return (File)mMatches.get(i);
}
public Iterator iterator() {
return Collections.unmodifiableList(mMatches).iterator();
}
public static Find fsFind(Pattern pattern, File startDir) {
return fsFind(pattern, startDir, false);
}
public static Find fsFind(String pattern, File startDir, boolean descendOnly) {
return fsFind(Pattern.compile(pattern), startDir, descendOnly);
}
public static Find fsFind(Pattern pattern, File startDir, boolean descendOnly) {
Find find = new Find(pattern, startDir, descendOnly);
Thread t = new Thread(find, "Find");
t.setDaemon(true);
t.start();
return find;
}
public static Find fsFind(String pattern, File startDir) {
return fsFind(Pattern.compile(pattern), startDir);
}
public static Find fsFind(Pattern pattern, String startDir) {
return fsFind(pattern, new File(startDir));
}
public static Find fsFind(String pattern, String startDir) {
return fsFind(Pattern.compile(pattern), startDir);
}
public static Find fsFind(String pattern, String startDir, boolean descendOnly) {
return fsFind(Pattern.compile(pattern), startDir, descendOnly);
}
public static Find fsFind(Pattern pattern, String startDir, boolean descendOnly) {
return fsFind(pattern, new File(startDir), descendOnly);
}
public static Find fsFind(String pattern) {
return fsFind(Pattern.compile(pattern));
}
public static Find fsFind(Pattern pattern) {
return fsFind(pattern, (File)null);
}
public void join() {
try {
while (mMyThread == null) {
Thread.yield();
}
mMyThread.join();
}
catch (InterruptedException ex) {
//TODO: Log this
}
}
public synchronized void addObserver(Observer o) {
if (o == null) return;
int size = size();
for (int i = 0; i < size; i++) {
o.update(this, get(i));
}
super.addObserver(o);
}
// super.addObserver(o);
// if (mMatches != null && mMatches.size() > 0) {
// for (int i = 0; i < mMatches.size(); i++) {o.update(this, mMatches.)
// }
// }
public void run() {
mStop = false;
mMyThread = Thread.currentThread();
if (mStartDir == null) {
mStartDir = new File(".");
}
mStartDir = mStartDir.getAbsoluteFile();
if (mStartDir.isDirectory()) {
mDirectoriesToSearch.add(mStartDir);
}
else {
mDirectoriesToSearch.add(mStartDir.getParentFile());
}
while (mDirectoriesToSearch.size() > 0 && !mStop) {
if (mPause) {
synchronized(this) {
try {
wait();
}
catch (Exception ex) {ex.printStackTrace();}
}
}
File toSearch = (File) mDirectoriesToSearch.remove(0);
//mDirectoriesSearched.add(toSearch.getAbsolutePath());
search(toSearch);
}
}
private void addToMatches(File dir) {
mMatches.add(dir);
notifyObservers(dir);
}
private void search(File dir) {
if (DEBUG) System.out.println("dir = " + dir);
if (mDirectoriesSearched.contains(dir.getAbsolutePath())) {
return;
}
mDirectoriesSearched.add(dir.getAbsolutePath());
if (!mDescOnly) {
File par = dir.getParentFile();
if (par != null) mDirectoriesToSearch.add(par);
}
Matcher matcher = mPattern.matcher(dir.getAbsolutePath());
if (matcher.matches()) {
addToMatches(dir);
}
boolean shouldMatch = true;
if (mDirContains != null) {
shouldMatch = contains(dir.getAbsolutePath().toLowerCase(), mDirContains);
}
File files[] = dir.listFiles();
if (files == null) {
return;
}
for (int i =0; i < files.length; i++) {
if (files[i].isDirectory()) {
if (DEBUG) {
System.out.println("adding to search: " + files[i]);
}
mDirectoriesToSearch.add(files[i]);
}
if (shouldMatch) {
matcher = mPattern.matcher(files[i].getAbsolutePath());
if (DEBUG) {
System.out.println ("Testing: " + files[i].getAbsolutePath());
}
//String name = files[i].getName();
if (matcher.matches()) {
super.setChanged();
addToMatches(files[i]);
}
}
}
}
public void setDirContains(String str) {
mDirContains = str.toLowerCase();
}
public String getDirContains() {
return mDirContains;
}
public void pause() {
mPause = !mPause;
if (!mPause) {
synchronized(this) {
notify();
}
}
}
public void stop() {
mStop = true;
}
/**
* Returns true if and only if this string contains the specified
* sequence of char values.
*
* @param s the sequence to search for
* @return true if this string contains <code>s</code>, false otherwise
* @throws NullPointerException if <code>s</code> is <code>null</code>
* @since 1.5
*/
public boolean contains(String st, CharSequence s) {
return st.indexOf(s.toString()) > -1;
}
} |
