com.adobe.xfa.scripthandler.rhino.ScriptObject Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of aem-sdk-api Show documentation
The Adobe Experience Manager SDK
There is a newer version: 2024.11.18751.20241128T090041Z-241100
/*
 * ADOBE CONFIDENTIAL
 *
 * Copyright 2007 Adobe Systems Incorporated All Rights Reserved.
 *
 * NOTICE: All information contained herein is, and remains the property of
 * Adobe Systems Incorporated and its suppliers, if any. The intellectual and
 * technical concepts contained herein are proprietary to Adobe Systems
 * Incorporated and its suppliers and may be covered by U.S. and Foreign
 * Patents, patents in process, and are protected by trade secret or copyright
 * law. Dissemination of this information or reproduction of this material
 * is strictly forbidden unless prior written permission is obtained from
 * Adobe Systems Incorporated.
 */
package com.adobe.xfa.scripthandler.rhino;


import org.mozilla.javascript.Context;
import org.mozilla.javascript.Script;
import org.mozilla.javascript.Scriptable;
import org.mozilla.javascript.ScriptableObject;
import org.mozilla.javascript.debug.DebuggableScript;

import java.util.ArrayList;
import java.util.List;


/**
 * A class to deconstruct a compiled script.
 * @auther Mike Tardif
 * @exclude from published api.
 */
class ScriptObject {

    private ScriptableObject moScriptableObj;
    private final List mMethods;
    private final List mVars;

    public ScriptObject(Script oScript) {
        assert (oScript != null);
        //
        // Grab functions and vars.
        //
        Context context = RhinoEngine.getThreadLocalRuntimeContext();
        DebuggableScript view = Context.getDebuggableView(oScript);
        mVars = new ArrayList();
        mMethods = new ArrayList();
        if (view != null) {
            //
            // Extracting variables and functions...
            //
            int nVars = view.getParamAndVarCount();
            for (int i = 0; i < nVars; i++) {
                String name = view.getParamOrVarName(i);
                // add a variable to our script object
                mVars.add(name);
            }
            int nFuncs = view.getFunctionCount();
            for (int i = 0; i < nFuncs; i++) {
                DebuggableScript func = view.getFunction(i);
                String name = func.getFunctionName();
                // add a method to our script object
                mMethods.add(name);
            }
        }
        //
        // Compile and create the object.
        //
        compile(context.decompileScript(oScript, 0));
    }

    private void compile(String sSource) {
        Context context = RhinoEngine.getThreadLocalRuntimeContext();
        Scriptable scope = RhinoEngine.getTopLevelScope();
        moScriptableObj = (ScriptableObject) context.newObject(scope);
        boolean bSuccess = (moScriptableObj != null);
        if (! bSuccess)
            return;
        //
        // Tack a newline on the script before we start appending code.
        // Otherwise if it ends in a //... style comment,
        // our code won't be executed.
        //
        StringBuilder sBuf = new StringBuilder(sSource);
        sBuf.append('\n');
        //
        // Construct some strings outside the loop for efficiency.
        //
        final String sThisDot = "this.";
        final String sEquals = " = ";
        final String sSemiColon = ";\n";
        //
        // Get the type for the id.
        //
        for (String sName: mMethods) {
            sBuf.append(sThisDot);
            sBuf.append(sName);
            sBuf.append(sEquals);
            sBuf.append(sName);
            sBuf.append(sSemiColon);
        }
        for (String sName: mVars) {
            sBuf.append(sThisDot);
            sBuf.append(sName);
            sBuf.append(sEquals);
            sBuf.append(sName);
            sBuf.append(sSemiColon);
        }
        context.evaluateString(moScriptableObj, sBuf.toString(), null, 0, null);
    }

    public Object get(String name, Scriptable start) {
        if (mVars.contains(name))
            return ScriptableObject.getProperty(moScriptableObj, name);
        return Scriptable.NOT_FOUND;
    }

    public void put(String name, Scriptable start, Object value) {
        if (mVars.contains(name))
            ScriptableObject.putProperty(moScriptableObj, name, value);
    }

}