package org.xwt;
import java.io.*;
+import java.util.*;
+import java.util.zip.*;
import org.xwt.js.*;
+import org.xwt.util.*;
+import org.bouncycastle.util.encoders.Base64;
-// FIXME: ByteStream fileName property
-/** base class for XWT resources */
+
+/** Base class for XWT resources */
public abstract class Res extends JS {
- public String toString() { return "Resource, source=FIXME"; }
+ // Base Class //////////////////////////////////////////////////////////////////////
+
+ public String typeName() { return "resource"; }
+
+ /** so that we get the same subresource each time */
+ private Hash refCache = null;
- public final InputStream getInputStream() { return getInputStream(""); }
+ /** FIXME: needed? good idea? */
+ public Template t = null;
- public Res graft(Object newResource) { throw new JS.Exn("cannot graft onto this resource"); }
- public Object get(Object key) { return new Ref(this, key); }
- public void put(Object key, Object val) { throw new JS.Exn("cannot put to a resource"); }
- public Object[] keys() { throw new JS.Exn("cannot enumerate a resource"); }
+ public final InputStream getInputStream() throws IOException { return getInputStream(""); }
+ public abstract InputStream getInputStream(String path) throws IOException;
- public abstract InputStream getInputStream(String path) { return getInputStream(""); }
- public abstract Res addExtension(String extension);
+ public Res addExtension(String extension) { return new Ref(this, extension); }
- public static Res stringToRes(String url) {
- if (url.indexOf('!') == -1)
- return new Zip(stringToRes(url.substring(0, url.lastIndexOf('!'))),
- url.substring(url.lastIndexOf('!') + 1));
- if (url.startsWith("http://")) return new HTTP(url);
- if (url.startsWith("https://")) return new HTTP(url);
- throw new JS.Exn("invalid resource specifier");
+ public Object get(Object key) {
+ if ("".equals(key)) {
+ Template t = Template.getTemplate(addExtension(".xwt"));
+ return t == null ? null : t.getStatic();
+ }
+ Object ret = refCache == null ? null : refCache.get(key);
+ if (ret != null) return ret;
+ ret = new Ref(this, key);
+ if (refCache == null) refCache = new Hash();
+ refCache.put(key, ret);
+ return ret;
}
+
+
+ // Caching //////////////////////////////////////////////////////////////////////
+
+ public static class NotCacheableException extends Exception { }
+ public static NotCacheableException notCacheable = new NotCacheableException();
+
+ /** if it makes sense to cache a resource, the resource must return a unique key */
+ public String getCacheKey() throws NotCacheableException { throw notCacheable; }
+
+ // FIXME: general cleanup
+ /** subclass from this if you want a CachedInputStream for each path */
+ public static class CachedRes extends Res {
+ private Res parent;
+ private boolean disk = false;
+ private String key;
+ public String getCacheKey() throws NotCacheableException { return key; }
+ public String toString() { return key; }
+ private Hash cachedInputStreams = new Hash();
+ public CachedRes(Res p, String s, boolean d) throws NotCacheableException {
+ this.parent = p; this.disk = d; this.key = p.getCacheKey();
+ }
+ public InputStream getInputStream(String path) throws IOException {
+ CachedInputStream cis = (CachedInputStream)cachedInputStreams.get(path);
+ if (cis == null) {
+ java.io.File f = null;
+ if (disk) {
+ f = new java.io.File(System.getProperty("user.home") +
+ java.io.File.separatorChar + ".xwt" +
+ java.io.File.separatorChar + "caches" +
+ java.io.File.separatorChar +
+ new String(Base64.encode(key.getBytes())));
+ Log.log(this, "caching resource in " + f);
+ new java.io.File(f.getParent()).mkdirs();
+ if (f.exists()) return new FileInputStream(f);
+ }
+ cis = new CachedInputStream(parent.getInputStream(path), f);
+ cachedInputStreams.put(path, cis);
+ }
+ return cis.getInputStream();
+ }
+ }
+
+
+ // Useful Subclasses //////////////////////////////////////////////////////////////////////
+
/** HTTP or HTTPS resource */
public static class HTTP extends Res {
private String url;
- HTTP(String url) { this.url = url; }
- public InputStream getInputStream(String path) { return new HTTP(url + path).GET(); }
+ HTTP(String url) { while (url.endsWith("/")) url = url.substring(0, url.length() - 1); this.url = url; }
+ public String toString() { return url; }
+ public String getCacheKey() throws NotCacheableException { return url; }
+ public InputStream getInputStream(String path) throws IOException { return new org.xwt.HTTP(url + path).GET(); }
}
- /** wrap a Res around a preexisting InputStream */
- public static class IS extends Res {
- InputStream parent;
- IS(InputStream parent) { this.parent = parent; }
- public InputStream getInputStream() { return parent; }
- public InputStream getInputStream(String path) {
- if (!"".equals(path)) throw new JS.Exn("can't access subresources of IS");
- return parent;
+ /** byte arrays */
+ public static class ByteArray extends Res {
+ private byte[] bytes;
+ private String cacheKey = null;
+ ByteArray(byte[] bytes, String cacheKey) { this.bytes = bytes; this.cacheKey = cacheKey; }
+ public String toString() { return "byte[]"; }
+ public String getCacheKey() throws NotCacheableException { return cacheKey; }
+ public InputStream getInputStream(String path) throws IOException {
+ if (!"".equals(path)) throw new JSExn("can't get subresources of a byte[] resource");
+ return new ByteArrayInputStream(bytes);
}
}
+ /** a file */
+ public static class File extends Res {
+ private String path;
+ File(String path) {
+ while (path.endsWith(java.io.File.separatorChar + "")) path = path.substring(0, path.length() - 1);
+ this.path = path;
+ }
+ public String toString() { return "file:" + path; }
+ public String getCacheKey() throws NotCacheableException { throw notCacheable; } // already on the disk!
+ public InputStream getInputStream(String rest) throws IOException {
+ return new FileInputStream((path + rest).replace('/', java.io.File.separatorChar)); }
+ }
+
/** "unwrap" a Zip archive */
public static class Zip extends Res {
private Res parent;
Zip(Res parent) { this.parent = parent; }
- public InputStream getInputStream(String path) {
- ZipInputStream zis = new ZipInputStream(parent.getInputStream());
+ public String toString() { return parent.toString() + "!zip"; }
+ public String getCacheKey() throws NotCacheableException { return parent.getCacheKey() + "!zip:"; }
+ public InputStream getInputStream(String path) throws IOException {
+ if (path.startsWith("/")) path = path.substring(1);
+ InputStream pis = parent.getInputStream();
+ ZipInputStream zis = new ZipInputStream(pis);
ZipEntry ze = zis.getNextEntry();
while(ze != null && !ze.getName().equals(path)) ze = zis.getNextEntry();
- if (ze == null) throw new JS.Exn("zip file not found in archive");
- return zis;
- }
- }
-
- /** what you get when you reference a subresource */
- public static class Ref extends Res {
- Res parent;
- Object key;
- Ref(Res parent, Object key) { this.parent = parent; this.key = key; }
- public InputStream getInputStream(path) {
- return parent.getInputStream("/" + key + path);
+ if (ze == null) throw new JSExn("requested file (" + path + ") not found in archive");
+ return new KnownLength.KnownLengthInputStream(zis, (int)ze.getSize());
}
- public Res graft(Object newResource) { return new Graft(parent, key, newResource); }
}
- /** shadow resource which replaces the graft */
- public static class Graft extends Res {
- Res graftee;
- Object replaced_key;
- Object replaced_val;
- Graft(Res graftee, Object key, Object val) {
- this.graftee = graftee; replaced_key = key; replaced_val = val; }
- public boolean equals(Object o) { return (this == o || graftee.equals(o)); }
- public Object get(Object key) {
- return replaced_key.equals(key) ? replaced_val : graftee.get(key);
+ /** "unwrap" a Cab archive */
+ public static class Cab extends Res {
+ private Res parent;
+ Cab(Res parent) { this.parent = parent; }
+ public String toString() { return parent.toString() + "!cab"; }
+ public String getCacheKey() throws NotCacheableException { return parent.getCacheKey() + "!cab:"; }
+ public InputStream getInputStream(String path) throws IOException {
+ if (path.startsWith("/")) path = path.substring(1);
+ return new org.xwt.translators.MSPack(parent.getInputStream()).getInputStream(path);
}
}
- /////////////// bytestream
-
- public Object callMethod(Object method, Array args, boolean checkOnly) throws JS.Exn {
- if (method.equals("getUTF")) {
- if (checkOnly) return Boolean.TRUE;
- if (args.length() != 0) return null;
- try {
- CharArrayWriter caw = new CharArrayWriter();
- InputStream is = getInputStream();
- BufferedReader r = new BufferedReader(new InputStreamReader(is));
- char[] buf = new char[1024];
- while(true) {
- int numread = r.read(buf, 0, 1024);
- if (numread == -1) break;
- caw.write(buf, 0, numread);
- }
- return caw.toString();
- } catch (IOException e) {
- if (Log.on) Log.log(ByteStream.class, "IO Exception while reading from file");
- if (Log.on) Log.log(ByteStream.class, e);
- throw new JS.Exn("error while reading from ByteStream");
- }
- } else if (name.equals("getDOM")) {
- if (checkOnly) return Boolean.TRUE;
- if (args.length() != 0) return null;
- return new XMLHelper().doParse();
+ /** the Builtin resource */
+ public static class Builtin extends Res {
+ public Builtin() { };
+ public String getCacheKey() throws NotCacheableException { throw notCacheable; } // not cacheable
+ public String toString() { return "builtin:"; }
+ public InputStream getInputStream(String path) throws IOException {
+ if (!path.equals("")) throw new IOException("the builtin resource has no subresources");
+ return Platform.getBuiltinInputStream();
}
- if (checkOnly) return Boolean.FALSE;
- return null;
}
- private class XMLHelper extends XML {
- Vector obStack = new Vector();
- public XMLHelper() { super(BUFFER_SIZE); }
- public void startElement(XML.Element c) throws XML.SchemaException {
- JS o = new JS.Obj();
- o.put("$name", c.localName);
- for(int i=0; i<c.len; i++) o.put(c.keys[i], c.vals[i]);
- o.put("$numchildren", new Integer(0));
- obStack.addElement(o);
- }
- public void endElement(XML.Element c) throws XML.SchemaException {
- if (obStack.size() == 1) return;
- JS me = (JS)obStack.lastElement();
- obStack.setSize(obStack.size() - 1);
- JS parent = (JS)obStack.lastElement();
- int numchildren = ((Integer)parent.get("$numchildren")).intValue();
- parent.put("$numchildren", new Integer(numchildren + 1));
- parent.put(new Integer(numchildren), me);
- }
- public void characters(char[] ch, int start, int length) throws XML.SchemaException {
- String s = new String(ch, start, length);
- JS parent = (JS)obStack.lastElement();
- int numchildren = ((Integer)parent.get("$numchildren")).intValue();
- Object lastChild = parent.get(new Integer(numchildren - 1));
- if (lastChild instanceof String) {
- parent.put(new Integer(numchildren - 1), lastChild + s);
- } else {
- parent.put("$numchildren", new Integer(numchildren + 1));
- parent.put(new Integer(numchildren), s);
- }
- }
- public void whitespace(char[] ch, int start, int length) {}
- public JS doParse() throws JS.Exn {
- try {
- InputStream is = getInputStream();
- BufferedReader r = new BufferedReader(new InputStreamReader(is));
- parse(r);
- } catch (XML.XMLException e) {
- throw new JS.Exn("error parsing XML: " + e.toString());
- } catch (IOException e) {
- if (Log.on) Log.log(ByteStream.class, "IO Exception while reading from file");
- if (Log.on) Log.log(ByteStream.class, e);
- throw new JS.Exn("error reading from ByteStream");
- }
- return obStack.size() >= 1 ? (JS)obStack.elementAt(0) : null;
- }
+ /** what you get when you reference a subresource */
+ public static class Ref extends Res {
+ Res parent;
+ Object key;
+ public String toString() { return parent.toString() + "/" + key; }
+ Ref(Res parent, Object key) { this.parent = parent; this.key = key; }
+ public String getCacheKey() throws NotCacheableException { return parent.getCacheKey() + "/" + key; }
+ public Res addExtension(String extension) {
+ return ((String)key).endsWith(extension) ? this : new Ref(parent, key + extension); }
+ public InputStream getInputStream(String path) throws IOException { return parent.getInputStream("/" + key + path); }
}
- public void writeTo(OutputStream os) throws IOException {
- InputStream is = getInputStream();
- byte[] buf = new byte[1024];
- while(true) {
- int numread = is.read(buf, 0, 1024);
- if (numread == -1) break;
- if (Log.on) Log.log(this, "wrote " + numread + " bytes");
- os.write(buf, 0, numread);
+ /** shadow resource which replaces the graft */
+ public static class ProgressWatcher extends Res {
+ final Res watchee;
+ JSFunction callback;
+ ProgressWatcher(Res watchee, JSFunction callback) { this.watchee = watchee; this.callback = callback; }
+ public String toString() { return watchee.toString(); }
+ public String getCacheKey() throws NotCacheableException { return watchee.getCacheKey(); }
+ public InputStream getInputStream(String s) throws IOException {
+ final InputStream is = watchee.getInputStream(s);
+ return new FilterInputStream(is) {
+ int bytesDownloaded = 0;
+ public int read() throws IOException {
+ int ret = super.read();
+ if (ret != -1) bytesDownloaded++;
+ return ret;
+ }
+ public int read(byte[] b, int off, int len) throws IOException {
+ int ret = super.read(b, off, len);
+ if (ret != 1) bytesDownloaded += ret;
+ Scheduler.add(new Scheduler.Task() { public void perform() {
+ callback.call(N(bytesDownloaded),
+ N(is instanceof KnownLength ? ((KnownLength)is).getLength() : 0), null, null, 2);
+ } });
+ return ret;
+ }
+ };
}
- os.flush();
-
- // we have to close this because flush() doesn't work on Win32-GCJ
- os.close();
}
}
projects / org.ibex.core.git / blobdiff