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Diffstat (limited to 'tags/java-stable-20060304/sca/container.js/src/main/java/org/apache/tuscany/container/js/rhino/RhinoScript.java')
-rw-r--r-- | tags/java-stable-20060304/sca/container.js/src/main/java/org/apache/tuscany/container/js/rhino/RhinoScript.java | 298 |
1 files changed, 0 insertions, 298 deletions
diff --git a/tags/java-stable-20060304/sca/container.js/src/main/java/org/apache/tuscany/container/js/rhino/RhinoScript.java b/tags/java-stable-20060304/sca/container.js/src/main/java/org/apache/tuscany/container/js/rhino/RhinoScript.java deleted file mode 100644 index 4ddee12fe4..0000000000 --- a/tags/java-stable-20060304/sca/container.js/src/main/java/org/apache/tuscany/container/js/rhino/RhinoScript.java +++ /dev/null @@ -1,298 +0,0 @@ -/** - * - * Copyright 2005 The Apache Software Foundation or its licensors, as applicable. - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ -package org.apache.tuscany.container.js.rhino; - -import java.util.Iterator; -import java.util.Map; - -import org.mozilla.javascript.Context; -import org.mozilla.javascript.ContextFactory; -import org.mozilla.javascript.Function; -import org.mozilla.javascript.Script; -import org.mozilla.javascript.Scriptable; -import org.mozilla.javascript.Wrapper; - -/** - * Represents, and is responsible for dispatching to, a JavaScript artifact in Rhino - */ -public class RhinoScript { - - private String scriptName; - - private String script; - - private Scriptable scriptScope; - - private Scriptable sharedScope; - - /* - * Enable dynamic scopes so a script can be used concurrently with a global shared scope and individual execution - * scopes. See http://www.mozilla.org/rhino/scopes.html TODO: need to review how ths fits in with Tuscany scopes - */ - private static class MyFactory extends ContextFactory { - protected boolean hasFeature(Context cx, int featureIndex) { - if (featureIndex == Context.FEATURE_DYNAMIC_SCOPE) { - return true; - } - return super.hasFeature(cx, featureIndex); - } - } - - static { - ContextFactory.initGlobal(new MyFactory()); - } - - /** - * Create a new RhinoInvoker. - * - * @param scriptName the name of the script. Can be anything, only used in messages to identify the script - * @param script the complete script - */ - public RhinoScript(String scriptName, String script) { - this(scriptName, script, (Map) null); - } - - /** - * Create a new RhinoInvoker. - * - * @param scriptName the name of the script. Can be anything, only used in messages to identify the script - * @param script the complete script - * @param context name-value pairs that are added in to the scope where the script is compiled. May be null. The - * value objects are made available to the script by using a variable with the name. - */ - public RhinoScript(String scriptName, String script, Map context) { - this.scriptName = scriptName; - this.script = script; - initScriptScope(scriptName, script, context); - initSharedScope(); - } - - /** - * Construct a RhinoInvoker from another RhinoInvoker object. This uses the original script scope so the script - * doesn't need to be recompiled. - */ - protected RhinoScript(String scriptName, String script, Scriptable scriptScope) { - this.scriptName = scriptName; - this.script = script; - this.scriptScope = scriptScope; - initSharedScope(); - } - - /** - * Invoke a script function - * - * @param functionName the name of the function to invoke. - * @param arg arguments to the function, may be a single object or an array of objects. - * @return the function return value. - */ - public Object invoke(String functionName, Object args) { - return invoke(functionName, args, null, null); - } - - /** - * Invoke a script function - * - * @param functionName the name of the function to invoke. - * @param arg arguments to the function, may be a single object or an array of objects. - * @param contexts a Map of name-value pairs which are added to the invocation Scope to enable the script to access - * the values by using the variable in name. - * @return the function return value. - */ - public Object invoke(String functionName, Object args, Map contexts) { - return invoke(functionName, args, null, contexts); - } - - /** - * Invoke a script function - * - * @param functionName the name of the function to invoke. - * @param arg arguments to the function, may be a single object or an array of objects. - * @param responseClass the desired class of the response object. - * @param contexts a Map of name-value pairs which are added to the invocation Scope to enable the script to access - * the values by using the variable in name. - * @return the function return value. - */ - public Object invoke(String functionName, Object arg, Class responseClass, Map contexts) { - Context cx = Context.enter(); - try { - Function function = getFunction(scriptScope, functionName); - Scriptable invocationScope = getInvocationScope(cx, contexts); - Object[] args = processArgs(arg, invocationScope); - Object jsResponse = function.call(cx, invocationScope, invocationScope, args); - Object response = processResponse(jsResponse, responseClass); - return response; - } finally { - Context.exit(); - } - } - - /** - * Turn args to JS objects and convert any OMElement to E4X XML - */ - protected Object[] processArgs(Object arg, Scriptable scope) { - // TODO: implement pluggable way to transform objects (eg SDO or AXIOM) to E4X XML objects - // if (arg instanceof OMElement) { - // try { - // arg = E4XAXIOMUtils.toScriptableObject((OMElement) arg, scope); - // } catch (XmlException e) { - // throw new RuntimeException(e); - // } - // } else if (arg instanceof MessageContext) { - // arg = new E4XMessageContext((MessageContext) arg, scope); - // } - Object[] args; - if (arg == null) { - args = new Object[] { null }; - } else if (arg.getClass().isArray()) { - args = (Object[]) arg; - for (int i = 0; i < args.length; i++) { - args[i] = Context.toObject(args[i], scope); - } - } else { - args = new Object[] { Context.toObject(arg, scope) }; - } - return args; - } - - /** - * Unwrap and convert response - */ - protected Object processResponse(Object response, Class responseClass) { - // TODO: implement pluggable way to transform E4X XML into specific objects (eg SDO or AXIOM) - // } else if (response instanceof XMLObject) { - // response = E4XAXIOMUtils.toOMElement((XMLObject) response); - if (Context.getUndefinedValue().equals(response)) { - response = null; - } else if (response instanceof Wrapper) { - response = ((Wrapper) response).unwrap(); - } else { - if (responseClass != null) { - response = Context.toType(response, responseClass); - } else { - response = Context.toType(response, String.class); - } - } - return response; - } - - /** - * Create a Rhino scope and compile the script into it - */ - protected void initScriptScope(String fileName, String scriptCode, Map context) { - Context cx = Context.enter(); - try { - - this.scriptScope = cx.initStandardObjects(null, true); - Script compiledScript = cx.compileString(scriptCode, fileName, 1, null); - compiledScript.exec(cx, scriptScope); - addContexts(scriptScope, context); - - } finally { - Context.exit(); - } - } - - /** - * Initializes the shared scope - */ - protected void initSharedScope() { - Context cx = Context.enter(); - try { - - this.sharedScope = cx.newObject(scriptScope); - sharedScope.setPrototype(scriptScope); - sharedScope.setParentScope(null); - - } finally { - Context.exit(); - } - } - - /** - * Get a Rhino scope for the function invocation. If the invocation has no context objects then this will use the - * shared scope otherwise a new scope is created to hold the context objects. Any new variables the executing script - * might define will go in the sharedScope. This new scope is just to hold the invocation specific context objects. - */ - protected Scriptable getInvocationScope(Context cx, Map contexts) { - - Scriptable scope; - if (contexts == null || contexts.size() == 0) { - scope = sharedScope; - } else { - scope = cx.newObject(sharedScope); - scope.setPrototype(sharedScope); - scope.setParentScope(null); - addContexts(scope, contexts); - } - - return scope; - } - - /** - * Add the context to the scope. This will make the objects available to a script by using the name it was added - * with. - */ - protected void addContexts(Scriptable scope, Map contexts) { - if (contexts != null) { - for (Iterator i = contexts.keySet().iterator(); i.hasNext();) { - String name = (String) i.next(); - Object value = contexts.get(name); - if (value != null) { - scope.put(name, scope, Context.toObject(value, scope)); - } - } - } - } - - /** - * Get the Rhino Function object for the named script function - */ - protected Function getFunction(Scriptable scope, String functionName) { - - Object handleObj = scope.get(functionName, scope); - - if (!(handleObj instanceof Function)) { - throw new RuntimeException("script function '" + functionName + "' is undefined or not a function in script " - + scriptName); - } - - return (Function) handleObj; - } - - /** - * Make a copy of this RhinoScript object. This shares the script scope to avoid the overhead of recompiling the - * script, and to allow any initialization done by the script to be shared. - */ - public RhinoScript copy() { - return new RhinoScript(scriptName, script, scriptScope); - } - - /** - * Update the scope where the script is complied with new context values - * - * @param properties - */ - public void updateScriptScope(Map context) { - Context.enter(); - try { - addContexts(scriptScope, context); - } finally { - Context.exit(); - } - } - -}
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