2003/11/29 06:22:33

[org.ibex.core.git] / src / org / xwt / js / JS.java

diff --git a/src/org/xwt/js/JS.java b/src/org/xwt/js/JS.java
index f227f53..d187ecb 100644 (file)
--- a/src/org/xwt/js/JS.java
+++ b/src/org/xwt/js/JS.java
@@ -6,9 +6,8 @@ import org.xwt.*;
 import java.io.*;
 import java.util.*;
 
-// FIXME: grafts
 /** The minimum set of functionality required for objects which are manipulated by JavaScript */
-public class JS { 
+public class JS extends org.xwt.util.BalancedTree { 
 
     // Static Interpreter Control Methods ///////////////////////////////////////////////////////////////
 
@@ -19,12 +18,12 @@ public class JS {
 
     public static String getSourceName() {
         Interpreter c = Interpreter.current();
-        return c.f == null ? null : c.f.sourceName;
+        return c == null || c.f == null ? null : c.f.sourceName;
     } 
 
     public static class PausedException extends Exception { PausedException() { } }
 
-    public static void invokePauseable(JSFunction function) throws JS.PausedException {
+    public static void invokePauseable(JSFunction function) throws JS.PausedException, JSExn {
         Interpreter i = new Interpreter(function, true, new JSArray());
         int oldpausecount = i.pausecount;
         i.resume();
@@ -44,7 +43,7 @@ public class JS {
     public static class UnpauseCallback {
         Interpreter i;
         UnpauseCallback(Interpreter i) { this.i = i; }
-        public void unpause(Object o) throws PausedException {
+        public void unpause(Object o) throws PausedException, JSExn {
             i.stack.push(o);
             i.resume();
         }
@@ -115,13 +114,29 @@ public class JS {
     public static final Object T = Boolean.TRUE;
     public static final Object F = Boolean.FALSE;
 
-    // FIXME: be much smarter here
-    public static final Number N(int i) { return new Integer(i); }
-    public static final Number N(long l) { return new Long(l); }
-    public static final Number N(double d) { return new Double(d); }
-    public static final Number N(String s) { return new Double(s); }
     public static final Boolean B(boolean b) { return b ? Boolean.TRUE : Boolean.FALSE; }
     public static final Boolean B(int i) { return i==0 ? Boolean.FALSE : Boolean.TRUE; }
+    public static final Number N(String s) { return s.indexOf('.') == -1 ? N(Integer.parseInt(s)) : new Double(s); }
+    public static final Number N(double d) { return (int)d == d ? N((int)d) : new Double(d); }
+    public static final Number N(long l) { return N((int)l); }
+
+    private static final Integer[] smallIntCache = new Integer[65535 / 4];
+    private static final Integer[] largeIntCache = new Integer[65535 / 4];
+    public static final Number N(int i) {
+        Integer ret = null;
+        int idx = i + smallIntCache.length / 2;
+        if (idx < smallIntCache.length && idx > 0) {
+            ret = smallIntCache[idx];
+            if (ret != null) return ret;
+        }
+        else ret = largeIntCache[Math.abs(idx % largeIntCache.length)];
+        if (ret == null || ret.intValue() != i) {
+            ret = new Integer(i);
+            if (idx < smallIntCache.length && idx > 0) smallIntCache[idx] = ret;
+            else largeIntCache[Math.abs(idx % largeIntCache.length)] = ret;
+        }
+        return ret;
+    }
     
     private static Enumeration emptyEnumeration = new Enumeration() {
             public boolean hasMoreElements() { return false; }
@@ -129,9 +144,14 @@ public class JS {
         };
     
     private Hash entries = null;
-    public Enumeration keys() { return entries == null ? emptyEnumeration : entries.keys(); }
-    public Object get(Object key) { return entries == null ? null : entries.get(key, null); }
-    public void put(Object key, Object val) { if (entries == null) entries = new Hash(); entries.put(key, null, val); }
+    public Enumeration keys() throws JSExn {
+        return entries == null ? emptyEnumeration : entries.keys();
+    }
+    public Object get(Object key) throws JSExn { return entries == null ? null : entries.get(key, null); }
+    public void put(Object key, Object val) throws JSExn {
+        if (entries == null) entries = new Hash();
+        entries.put(key, null, val);
+    }
 
 
     // Trap support //////////////////////////////////////////////////////////////////////////////
@@ -140,14 +160,14 @@ public class JS {
     protected boolean isTrappable() { return false; }
 
     /** performs a put, triggering traps if present; traps are run in an unpauseable interpreter */
-    public final void putAndTriggerTraps(Object key, Object value) {
+    public void putAndTriggerTraps(Object key, Object value) throws JSExn {
         Trap t = getTrap(key);
         if (t != null) t.invoke(key, value);
         else put(key, value);
     }
 
     /** performs a get, triggering traps if present; traps are run in an unpauseable interpreter */
-    public final Object getAndTriggerTraps(Object key) {
+    public Object getAndTriggerTraps(Object key) throws JSExn {
         Trap t = getTrap(key);
         if (t != null) return t.invoke(key);
         else return get(key);
@@ -184,19 +204,19 @@ public class JS {
 
     // return this from get() if the key was actually a method.
     public static final Object METHOD = new Object();
-    public Object callMethod(Object method, Object a0, Object a1, Object a2, Object[] rest, int nargs) {
+    public Object callMethod(Object method, Object a0, Object a1, Object a2, Object[] rest, int nargs) throws JSExn {
         throw new JSExn("attempted to call the null value (method "+method+")");
-    }
-    public Object call(Object a0, Object a1, Object a2, Object[] rest, int nargs) {
-        throw new JSExn("you cannot call this object)");
+    }    
+    public Object call(Object a0, Object a1, Object a2, Object[] rest, int nargs) throws JSExn {
+        throw new JSExn("you cannot call this object (class=" + this.getClass().getName() +")");
     }
 
 
     // Typing Support //////////////////////////////////////////////////////////////////////////////
 
-    public Number coerceToNumber() { throw new JSExn("tried to coerce a JavaScript object to a Number"); }
-    public String coerceToString() { throw new JSExn("tried to coerce a JavaScript object to a String"); }
-    public boolean coerceToBoolean() { throw new JSExn("tried to coerce a JavaScript object to a Boolean"); }
+    public Number coerceToNumber() { throw new JSRuntimeExn("tried to coerce a JavaScript object to a Number"); }
+    public String coerceToString() { throw new JSRuntimeExn("tried to coerce a JavaScript object to a String"); }
+    public boolean coerceToBoolean() { throw new JSRuntimeExn("tried to coerce a JavaScript object to a Boolean"); }
 
     public String typeName() { return "object"; }