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* Implement global functions wrapJavaMap() and unwrapJavaMap() to masquerade

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instances of java.util.Map as JS objects and back.
This commit is contained in:
hns 2006-01-27 14:23:56 +00:00
parent 8509b4b6c3
commit 729a7fa888
1 changed files with 35 additions and 4 deletions
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39
src/helma/scripting/rhino/GlobalObject.java
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@ -34,7 +34,7 @@ import java.text.*;
import java.io.*;
/**
*
* Helma global object defines a number of custom global functions.
*/
public class GlobalObject extends ImporterTopLevel implements PropertyRecorder {
Application app;
@ -68,7 +68,8 @@ public class GlobalObject extends ImporterTopLevel implements PropertyRecorder {
"encodeXml", "encodeForm", "stripTags", "formatParagraphs",
"getXmlDocument", "getHtmlDocument", "seal",
"getDBConnection", "getURL", "write", "writeln",
"serialize", "deserialize", "defineLibraryScope"
"serialize", "deserialize", "defineLibraryScope",
"wrapJavaMap", "unwrapJavaMap"
};
defineFunctionProperties(globalFuncs, GlobalObject.class, 0);
@ -77,10 +78,10 @@ public class GlobalObject extends ImporterTopLevel implements PropertyRecorder {
// Define dontEnum() on Object prototype
String[] objFuncs = { "dontEnum" };
ScriptableObject objproto = (ScriptableObject) getObjectPrototype(this);
objproto.defineFunctionProperties(objFuncs, GlobalObject.class,
objproto.defineFunctionProperties(objFuncs, GlobalObject.class,
DONTENUM | READONLY | PERMANENT);
}
/**
* Get the global object's class name
*
@ -400,6 +401,36 @@ public class GlobalObject extends ImporterTopLevel implements PropertyRecorder {
put(name, this, scope);
}
/**
* Wrap a java.util.Map so that it looks and behaves like a native JS object
* @param obj a map
* @return a wrapper that makes the map look like a JS object
*/
public Object wrapJavaMap(Object obj) {
if (obj instanceof Wrapper) {
obj = ((Wrapper) obj).unwrap();
}
if (!(obj instanceof Map)) {
throw ScriptRuntime.constructError("TypeError",
"Invalid argument to wrapMap(): " + obj);
}
return new MapWrapper((Map) obj, core);
}
/**
* Unwrap a map previously wrapped using {@link #wrapJavaMap(Object)}.
* @param obj the wrapped map
* @return the map exposed as java object
*/
public Object unwrapJavaMap(Object obj) {
if (!(obj instanceof MapWrapper)) {
throw ScriptRuntime.constructError("TypeError",
"Invalid argument to unwrapMap(): " + obj);
}
obj = ((MapWrapper) obj).unwrap();
return new NativeJavaObject(core.global, obj, Map.class);
}
/**
*
*