/** Store a specific value against the given key. */
public void put(JS key, JS value) throws JSExn;
- /** Executes or unpauses the task, running it in a
- * <i>pausable</i> context. */
- public Object run(Object o) throws Exception, AlreadyRunningException;
-
- /** Pauses the running task at its convienience. */
- public void pause() throws NotPausableException;
-
/** Calls a specific method with given arguments on this object.
* An exception is thrown if there is no such method or the
* arguments are invalid. */
public JS call(JS method, JS[] args) throws JSExn;
- /** Calls this object with the given arguments, running it in an
- * <i>unpausable</i> context. An exception is thrown if this
- * object is not callable or the arguments are invalid. */
- public JS call(JS[] args) throws JSExn;
-
/** Returns the names of the formal arguments, if any.
* This function must never return a null object. */
public String[] getFormalArgs();
- /** Returns true if the specific key is found in this object. */
- public boolean hasKey(JS key);
-
/** Put a value to the given key, calling any write traps that have
* been placed on the key.
*
public Trap getTrap(JS key) throws JSExn;
// FIXME: consider renaming/removing these
- public InputStream getInputStream() throws IOException, JSExn;
public JS unclone();
- public String coerceToString();
+ public String coerceToString() throws JSExn;
// Implementations ////////////////////////////////////////////////////////
private static final String[] emptystr = new String[0];
public JS unclone() { return this; }
- public JS.Enumeration keys() throws JSExn { throw new JSExn(
- "object has no key set, class ["+ getClass().getName() +"]"); }
+ public JS.Enumeration keys() throws JSExn {
+ throw new JSExn("object has no key set, class ["+ getClass().getName() +"]"); }
public JS get(JS key) throws JSExn { return null; }
- public void put(JS key, JS val) throws JSExn { throw new JSExn(
- "'" + key + "' is read only on class ["+ getClass().getName() +"]"); }
- public InputStream getInputStream() throws IOException, JSExn { throw new JSExn(
- "object has not associated stream, class ["+ getClass().getName() +"]"); }
-
- public boolean hasKey(JS key) { return false; }
-
- public Object run(Object o) throws Exception { throw new JSExn(
- "object cannot be called, class ["+ getClass().getName() +"]"); }
- public void pause() { throw new NotPausableException(); }
+ public void put(JS key, JS val) throws JSExn {
+ throw new JSExn("'" + key + "' is read only on class ["+ getClass().getName() +"]"); }
- public JS call(JS[] args) throws JSExn { throw new JSExn(
- "object cannot be called, class ["+ getClass().getName() +"]"); }
- public JS call(JS method, JS[] args) throws JSExn { throw new JSExn(
- "method not found: " + Script.str(method)); }
+ public JS call(JS method, JS[] args) throws JSExn {
+ if (method == null) throw new JSExn( "object cannot be called, class ["+ getClass().getName() +"]");
+ throw new JSExn("method not found: " + JSU.str(method) + " class="+this.getClass().getName());
+ }
public String[] getFormalArgs() { return emptystr; }
-
- public void declare(JS key) throws JSExn { throw new JSExn(
- "object cannot declare key: "+ Script.str(key)); }
- public void undeclare(JS key) throws JSExn { } // FIXME throw error?
+ public String coerceToString() throws JSExn { throw new JSExn("cannot coerce a "+getClass().getName()+" to a string"); }
public JS putAndTriggerTraps(JS key, JS val) throws JSExn { throw new JSExn(
"'" + key + "' is trap read only on class ["+ getClass().getName() +"]"); }
public JS getAndTriggerTraps(JS key) throws JSExn { return null; } // FIXME throw errors?
public JS justTriggerTraps(JS key, JS value) throws JSExn { return null; }
-
- public void addTrap(JS key, JS function) throws JSExn { throw new JSExn(
- "'" + key + "' is not trappable on class ["+ getClass().getName() +"]"); }
- public void delTrap(JS key, JS function) throws JSExn { throw new JSExn(
- "'" + key + "' trap is read only on class ["+ getClass().getName() +"]"); }
- public Trap getTrap(JS key) throws JSExn { throw new JSExn(
- "'" + key + "' is not trappable on class ["+ getClass().getName() +"]"); }
-
- public String coerceToString() { return "object"; }
+ public void addTrap(JS key, JS function) throws JSExn {
+ Log.warn(this, "'" + JSU.str(key) + "' is not trappable on class ["+ getClass().getName() +"]"); }
+ public void delTrap(JS key, JS function) throws JSExn {
+ Log.warn(this, "'" + JSU.str(key) + "' trap is read only on class ["+ getClass().getName() +"]"); }
+ public Trap getTrap(JS key) throws JSExn { return null; }
}
public interface Cloneable {}
public static class Clone implements JS {
protected final JS clonee;
public Clone(JS clonee) throws JSExn {
- if (!(clonee instanceof Cloneable)) throw new JSExn(
- clonee.getClass().getName() + " is not implement cloneable");
+ if (!(clonee instanceof Cloneable)) throw new JSExn(clonee.getClass().getName() + " is not implement cloneable");
this.clonee = clonee;
}
-
public JS unclone() { return clonee.unclone(); }
public boolean equals(Object o) { return clonee.equals(o); }
-
public Enumeration keys() throws JSExn { return clonee.keys(); }
public JS get(JS k) throws JSExn { return clonee.get(k); }
public void put(JS k, JS v) throws JSExn { clonee.put(k, v); }
- public InputStream getInputStream() throws IOException, JSExn {
- return clonee.getInputStream(); }
-
- public Object run(Object o) throws Exception { return clonee.run(o); }
- public void pause() { clonee.pause(); }
-
public JS call(JS m, JS[] a) throws JSExn { return clonee.call(m, a); }
- public JS call(JS[] a) throws JSExn { return clonee.call(a); }
public String[] getFormalArgs() { return clonee.getFormalArgs(); }
-
- public boolean hasKey(JS k) { return clonee.hasKey(k); }
-
- public JS putAndTriggerTraps(JS k, JS v) throws JSExn {
- return clonee.putAndTriggerTraps(k, v); }
- public JS getAndTriggerTraps(JS k) throws JSExn {
- return clonee.getAndTriggerTraps(k); }
- public JS justTriggerTraps(JS k, JS v) throws JSExn {
- return clonee.justTriggerTraps(k, v); }
-
+ public JS putAndTriggerTraps(JS k, JS v) throws JSExn { return clonee.putAndTriggerTraps(k, v); }
+ public JS getAndTriggerTraps(JS k) throws JSExn { return clonee.getAndTriggerTraps(k); }
+ public JS justTriggerTraps(JS k, JS v) throws JSExn { return clonee.justTriggerTraps(k, v); }
public void addTrap(JS k, JS f) throws JSExn { clonee.addTrap(k, f); }
public void delTrap(JS k, JS f) throws JSExn { clonee.delTrap(k, f); }
public Trap getTrap(JS k) throws JSExn { return clonee.getTrap(k); }
-
- public String coerceToString() { return clonee.coerceToString(); }
+ public String coerceToString() throws JSExn { return clonee.coerceToString(); }
}
- public static class Obj extends LinearStore implements JS {
+ public static class Obj extends Basket.HashMap implements JS {
private static final String[] emptystr = new String[0];
private static final Placeholder holder = new Placeholder();
- /** entries[index + 0] // key
- * entries[index + 1] // value
- * entries[index + 2] // trap
- */
- protected final int indexmultiple = 3;
-
- protected void entryAdded(int p) {}
- protected void entryUpdated(int p) {}
- protected void entryRemoved(int p) {}
-
- public Obj() { super(4, 0.75F); }
+ public Obj() { super(3, 4, 0.75F); }
public JS unclone() { return this; }
- public InputStream getInputStream() throws IOException, JSExn { throw new JSExn(
- "object has not associated stream, class ["+ getClass().getName() +"]"); }
-
- public Object run(Object o) throws Exception { throw new JSExn(
- "object cannot be called, class ["+ getClass().getName() +"]"); }
- public void pause() { throw new NotPausableException(); }
-
- public JS call(JS[] args) throws JSExn { throw new JSExn(
- "object cannot be called, class ["+ getClass().getName() +"]"); }
- public JS call(JS method, JS[] args) throws JSExn { throw new JSExn(
- "method not found: " + Script.str(method)); }
public String[] getFormalArgs() { return emptystr; }
+ public JS call(JS method, JS[] args) throws JSExn {
+ throw new JSExn(method==null ? "cannot call a " + getClass().getName() : "method not found: " + JSU.str(method)); }
+
public Enumeration keys() throws JSExn {
- // FEATURE: replicate some code from a superclass to avoid double object creation
- return new Enumeration.JavaIterator(null, new LinearStore.IndexIterator() {
- public Object next() { return entries[nextIndex()]; } });
+ final Object[] keys = super.dumpkeys();
+ return new Enumeration(null) {
+ private int cur = 0;
+ public boolean _hasNext() { return cur < keys.length; }
+ public JS _next() throws JSExn {
+ if (cur >= keys.length) throw new NoSuchElementException();
+ return (JS)keys[cur++];
+ }
+ };
}
- public JS get(JS key) throws JSExn { int i = indexOf(key);
- return i < 0 ? null : entries[i + 1] instanceof Placeholder ? null : (JS)entries[i + 1]; }
- public void put(JS key, JS val) throws JSExn {
- // NOTE: only way value can be stored as null is using declare()
- int dest = put(indexOf(key), key);
- if (val == null) entries[dest + 1] = holder;
- else entries[dest + 1] = val; }
- public boolean hasKey(JS key) { return indexOf(key) >= 0; }
- /*public boolean hasValue(JS key, JS value) {
- int i = indexOf(key); return i >= 0 && entries[i + 1] != null; }
- public boolean hasTrap(JS key, JS trap) {
- int i = indexOf(key); return i >= 0 && entries[i + 2] != null; }*/
-
- public void declare(JS key) throws JSExn { entries[put(indexOf(key), key) + 1] = null; }
- public void undeclare(JS key) throws JSExn { remove(indexOf(key)); }
+ public JS get(JS key) throws JSExn { return (JS)super.get(key, 0); }
+ public void put(JS key, JS val) throws JSExn { super.put(key, val, 0); }
public JS putAndTriggerTraps(JS key, JS val) throws JSExn {
- Trap t = null; int i = indexOf(key);
- if (i >= 0) t = (Trap)entries[i + 2];
- if (t != null && (t = t.write()) != null) {
- val = (JS)new Interpreter(t, val, false).run(null);
- }
- if (val == null) entries[i + 1] = holder;
- else entries[i + 1] = val;
+ Trap t = (Trap)super.get(key, 1);
+ if (t != null && (t = t.write()) != null) val = (JS)new Interpreter(t, val, false).run(null);
+ put(key, val); // HACK: necessary for subclasses overriding put()
return val;
}
public JS getAndTriggerTraps(JS key) throws JSExn {
- Trap t = null; int i = indexOf(key);
- if (i < 0) return null;
- t = (Trap)entries[i + 2];
- return t == null ? (JS)entries[i + 1] : (JS)new Interpreter(t, null, false).run(null);
+ Trap t = (Trap)super.get(key, 1);
+ return t == null ? (JS)super.get(key) : (JS)new Interpreter(t, null, false).run(null);
}
public JS justTriggerTraps(JS key, JS val) throws JSExn {
- Trap t = null; int i = indexOf(key);
- if (i >= 0) t = (Trap)entries[i + 2];
+ Trap t = (Trap)super.get(key, 1);
if (t == null || (t = t.write()) == null) return val;
return (JS)new Interpreter(t, val, true).run(null);
}
- /** returns a callback which will restart the context; expects a value to be pushed onto the stack when unpaused */
- public static UnpauseCallback pause() throws NotPauseableException {
- Interpreter i = Interpreter.current();
- if (i.pausecount == -1) throw new NotPauseableException();
- boolean get;
- switch(i.f.op[i.pc]) {
- case Tokens.RETURN: case ByteCodes.PUT: get = false; break;
- case ByteCodes.GET: case ByteCodes.CALL: get = true; break;
- default: throw new Error("should never happen");
+ public void addTrap(JS key, JS f) throws JSExn {
+ if (f.getFormalArgs() == null || f.getFormalArgs().length > 1)
+ throw new JSExn("traps must take either one argument (write) or no arguments (read)");
+ for (Trap t = (Trap)super.get(key, 1); t != null; t = t.next())
+ if (t.function().equals(f)) return;
+ super.put(key, new TrapHolder(this, key, f, (Trap)super.get(key, 1)), 1);
}
public void delTrap(JS key, JS f) throws JSExn {
- int i = indexOf(key); if (i < 0) return;
- Trap t = (Trap)entries[i + 2];
- if (t.function().equals(f)) { entries[i + 2] = t.next(); return; }
+ Trap t = (Trap)super.get(key, 1);
+ if (t==null) return;
+ if (t.function().equals(f)) { super.put(key, t.next(), 2); return; }
for (; t.next() != null; t = t.next())
if (t.next().function().equals(f)) { ((TrapHolder)t).next = t.next().next(); return; }
}
- public Trap getTrap(JS key) throws JSExn {
- int i = indexOf(key); return i < 0 ? null : (Trap)entries[i + 2];
- }
+ public Trap getTrap(JS key) throws JSExn { return (Trap)super.get(key, 1); }
- public String coerceToString() { return "object"; }
+ public String coerceToString() throws JSExn { throw new JSExn("cannot coerce a "+getClass().getName()+" to a string"); }
private static final class Placeholder implements Serializable {}
private final JS target, key, function;
private Trap next;
TrapHolder(JS t, JS k, JS f, Trap n) { target = t; key = k; function = f; next = n; }
-
public JS key() { return key; }
public JS target() { return target; }
public JS function() { return function; }
-
- public boolean isReadTrap() {
- return function.getFormalArgs() == null || function.getFormalArgs().length == 0; }
- public boolean isWriteTrap() {
- return function.getFormalArgs() != null && function.getFormalArgs().length != 0; }
-
+ public boolean isReadTrap() { return function.getFormalArgs() == null || function.getFormalArgs().length == 0; }
+ public boolean isWriteTrap() { return function.getFormalArgs() != null && function.getFormalArgs().length != 0; }
public Trap next() { return next; }
- public Trap nextRead() {
- Trap t = next; while (t != null && t.isWriteTrap()) t = t.next(); return t; }
- public Trap nextWrite() {
- Trap t = next; while (t != null && t.isReadTrap()) t = t.next(); return t; }
+ public Trap nextRead() { Trap t = next; while (t != null && t.isWriteTrap()) t = t.next(); return t; }
+ public Trap nextWrite() { Trap t = next; while (t != null && t.isReadTrap()) t = t.next(); return t; }
public Trap read() { return isReadTrap() ? this : nextRead(); }
public Trap write() { return isWriteTrap() ? this : nextWrite(); }
}
protected abstract boolean _hasNext();
protected abstract JS _next() throws JSExn;
- public final boolean hasNext() {
- return _hasNext() || parent != null ? parent.hasNext() : false; }
+ public final boolean hasNext() { return _hasNext() || (parent != null ? parent.hasNext() : false); }
public final JS next() throws JSExn {
if (_hasNext()) return _next();
if (parent == null) throw new NoSuchElementException("reached end of set");
}
public JS get(JS key) throws JSExn {
- //#switch(Script.str(key))
- case "hasNext": return Script.B(hasNext());
+ //#switch(JSU.str(key))
+ case "hasNext": return JSU.B(hasNext());
case "next": return next();
//#end
return super.get(key);
public static final class RandomAccessList extends Enumeration {
private final List l;
private int pos = 0, size;
- public RandomAccessList(Enumeration parent, List list) {
- super(parent); l = list; size = l.size(); }
+ public RandomAccessList(Enumeration parent, List list) { super(parent); l = list; size = l.size(); }
protected boolean _hasNext() { return pos < size; }
protected JS _next() { return (JS)l.get(pos++); }
}
projects / org.ibex.js.git / blobdiff