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 */
public abstract class Res extends JS {
- public String toString() { return "Resource, source=FIXME"; }
+ public String getDescriptiveName() { return ""; }
+ public String typeName() { return "resource"; }
- public final InputStream getInputStream() { return getInputStream(""); }
+ /** cache of subresources so that the equality operator works on them */
+ private Hash refCache = null;
+ public Template t = null;
+
+ public Res getParent() { return null; }
+
+ /** an InputStream that makes sure it is not in the MessageQueue when blocked on a read */
+ // FIXME
+ private static class BackgroundInputStream extends FilterInputStream {
+ BackgroundInputStream(InputStream i) { super(i); }
+ /*
+ private void suspend() throws IOException {
+ if (!ThreadMessage.suspendThread())
+ throw new IOException("attempt to perform background-only operation in a foreground thread");
+ }
+ private void resume() {
+ ThreadMessage.resumeThread();
+ }
+ public int read() throws IOException {
+ suspend();
+ try { return super.read(); }
+ finally { resume(); }
+ }
+ public int read(byte[] b, int off, int len) throws IOException {
+ suspend();
+ try { return super.read(b, off, len); }
+ finally { resume(); }
+ }
+ */
+ }
+
+ /** returns an InputStream containing the Resource's contents */
+ public final InputStream getInputStream() throws IOException { return new BackgroundInputStream(getInputStream("")); }
+ public abstract InputStream getInputStream(String path) throws IOException;
+
+ /** graft newResource in place of this resource on its parent */
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 abstract InputStream getInputStream(String path) { return getInputStream(""); }
- public abstract Res addExtension(String extension);
+ /** if the path of this resource does not end with extension, return a new one wit it appended */
+ public Res addExtension(String extension) { return new Ref(this, extension); }
+
+ public Object[] keys() { throw new JS.Exn("cannot enumerate a resource"); }
+ public void put(Object key, Object val) { throw new JS.Exn("cannot put to a resource"); }
+ 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;
+ }
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.indexOf('!') != -1) {
+ Res ret = new Zip(stringToRes(url.substring(0, url.lastIndexOf('!'))));
+ String subpath = url.substring(url.lastIndexOf('!') + 1);
+ if (subpath.length() > 0) ret = (Res)ret.get(subpath);
+ return ret;
+ }
if (url.startsWith("http://")) return new HTTP(url);
if (url.startsWith("https://")) return new HTTP(url);
- throw new JS.Exn("invalid resource specifier");
+ if (url.startsWith("cab:")) return new CAB(stringToRes(url.substring(4)));
+ if (url.startsWith("data:")) return new ByteArray(Base64.decode(url.substring(5)));
+ if (url.startsWith("utf8:")) return new ByteArray(url.substring(5).getBytes());
+ throw new JS.Exn("invalid resource specifier " + url);
+ }
+
+ /** subclass from this if you want a CachedInputStream for each path */
+ public static abstract class CachedRes extends Res {
+ private Hash cachedInputStreams = new Hash();
+ abstract InputStream _getInputStream(String path) throws IOException;
+ public final InputStream getInputStream(String path) throws IOException {
+ CachedInputStream cis = (CachedInputStream)cachedInputStreams.get(path);
+ if (cis == null) {
+ cis = new CachedInputStream(_getInputStream(path));
+ cachedInputStreams.put(path, cis);
+ }
+ return cis.getInputStream();
+ }
}
/** HTTP or HTTPS resource */
- public static class HTTP extends Res {
+ public static class HTTP extends CachedRes {
private String url;
HTTP(String url) { this.url = url; }
- public InputStream getInputStream(String path) { return new HTTP(url + path).GET(); }
+ public String getDescriptiveName() { 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;
+ ByteArray(byte[] bytes) { this.bytes = bytes; }
+ public String getDescriptiveName() { return "byte[]"; }
+ public InputStream getInputStream(String path) throws IOException {
+ if (!"".equals(path)) throw new JS.Exn("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) { this.path = path; }
+ public String getDescriptiveName() { return "file://" + path; }
+ 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 getDescriptiveName() { return parent.getDescriptiveName() + "!"; }
+ 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;
+ if (ze == null) throw new JS.Exn("requested file (" + path + ") not found in archive");
+ return new KnownLength.KnownLengthInputStream(zis, (int)ze.getSize());
}
}
+ /** the Builtin resource */
+ public static class Builtin extends Res {
+ public Builtin() { };
+ public String getDescriptiveName() { return "[builtin]"; }
+ public InputStream getInputStream(String path) throws IOException {
+ if (!path.equals("")) throw new IOException("the builtin resource has no subresources");
+ return Platform.getBuiltinInputStream();
+ }
+ }
+
/** 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) {
+ public String getDescriptiveName() {
+ String pdn = parent.getDescriptiveName();
+ if (pdn.equals("")) return key.toString();
+ if (!pdn.endsWith("!")) pdn += ".";
+ return pdn + key.toString();
+ }
+ public Res addExtension(String extension) {
+ return (key instanceof String && ((String)key).endsWith(extension)) ? this : new Ref(parent, key + extension);
+ }
+ public InputStream getInputStream(String path) throws IOException {
return parent.getInputStream("/" + key + path);
}
+ public Res getParent() { return parent; }
public Res graft(Object newResource) { return new Graft(parent, key, newResource); }
}
+ // FEATURE: eliminate code duplication with JS.Graft
/** 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; }
+ 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);
+ public int hashCode() { return graftee.hashCode(); }
+ public InputStream getInputStream(String s) throws IOException { return graftee.getInputStream(s); }
+ public Object get(Object key) { return replaced_key.equals(key) ? replaced_val : graftee.get(key); }
+ public String getDescriptiveName() { return graftee.getDescriptiveName(); }
+ public Res getParent() { return graftee.getParent(); }
+ public Object callMethod(Object method, Array args, boolean checkOnly) throws JS.Exn {
+ if (!replaced_key.equals(method)) return graftee.callMethod(method, args, checkOnly);
+ if (replaced_val instanceof Callable) return checkOnly ? Boolean.TRUE : ((Callable)replaced_val).call(args);
+ if (checkOnly) return Boolean.FALSE;
+ throw new JS.Exn("attempt to call non-function");
+ }
+ public Number coerceToNumber() { return graftee.coerceToNumber(); }
+ public String coerceToString() { return graftee.coerceToString(); }
+ public boolean coerceToBoolean() { return graftee.coerceToBoolean(); }
+ public String typeName() { return graftee.typeName(); }
+ }
+
+ /** shadow resource which replaces the graft */
+ public static class ProgressWatcher extends Res {
+ final Res watchee;
+ JS.CompiledFunction callback;
+ ProgressWatcher(Res watchee, JS.CompiledFunction callback) { this.watchee = watchee; this.callback = callback; }
+ public String getDescriptiveName() { return watchee.getDescriptiveName(); }
+ 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 Object call(Object arg) {
+ JS.Array args = new JS.Array();
+ args.addElement(new Integer(bytesDownloaded));
+ args.addElement(new Integer(is instanceof KnownLength ? ((KnownLength)is).getLength() : 0));
+ // FIXME
+ // new JS.Thread(callback, callbackScope).resume();
+ return null;
+ } });
+ return ret;
+ }
+ };
}
}
- /////////////// bytestream
+ /** unpacks a Microsoft CAB file (possibly embedded in another file; we scan for 'MSCF' */
+ public static class CAB extends Res {
+ private Res parent;
+ CAB(Res parent) { this.parent = parent; }
+ private int swap_endian(int i) {
+ return ((i & 0xff) << 24) | ((i & 0xff00) << 8) | ((i & 0xff0000) >>> 8) | (i >>> 24);
+ }
+ public InputStream getInputStream(String path) throws IOException {
+ try {
+ return org.xwt.util.CAB.getFileInputStream(parent.getInputStream(), 2, path);
+ } catch (EOFException eof) {
+ throw new JS.Exn("MSCF header tag not found in file");
+ } catch (IOException ioe) {
+ throw new JS.Exn("IOException while reading file");
+ }
+ }
+ }
public Object callMethod(Object method, Array args, boolean checkOnly) throws JS.Exn {
if (method.equals("getUTF")) {
}
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");
+ if (Log.on) Log.log(Res.class, "IO Exception while reading from file");
+ if (Log.on) Log.log(Res.class, e);
+ throw new JS.Exn("error while reading from Resource");
}
- } else if (name.equals("getDOM")) {
+ } else if (method.equals("getDOM")) {
if (checkOnly) return Boolean.TRUE;
if (args.length() != 0) return null;
return new XMLHelper().doParse();
} 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");
+ if (Log.on) Log.log(this, "IO Exception while reading from file");
+ if (Log.on) Log.log(this, e);
+ throw new JS.Exn("error reading from Resource");
}
return obStack.size() >= 1 ? (JS)obStack.elementAt(0) : null;
}
projects / org.ibex.core.git / blobdiff