shellcontextfactory.java

javascript语言的解释器源码

/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 *
 * The contents of this file are subject to the Netscape Public
 * License Version 1.1 (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.mozilla.org/NPL/
 *
 * Software distributed under the License is distributed on an "AS
 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * rights and limitations under the License.
 *
 * The Original Code is Rhino code, released
 * May 6, 1998.
 *
 * The Initial Developer of the Original Code is Netscape
 * Communications Corporation.  Portions created by Netscape are
 * Copyright (C) 1997-1999 Netscape Communications Corporation. All
 * Rights Reserved.
 *
 * Contributor(s):
 * Igor Bukanov
 *
 * Alternatively, the contents of this file may be used under the
 * terms of the GNU Public License (the "GPL"), in which case the
 * provisions of the GPL are applicable instead of those above.
 * If you wish to allow use of your version of this file only
 * under the terms of the GPL and not to allow others to use your
 * version of this file under the NPL, indicate your decision by
 * deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL.  If you do not delete
 * the provisions above, a recipient may use your version of this
 * file under either the NPL or the GPL.
 */

package org.mozilla.javascript.tools.shell;

import org.mozilla.javascript.*;

public class ShellContextFactory extends ContextFactory
{
    private boolean strictMode;
    private int languageVersion;
    private int optimizationLevel;
    private ErrorReporter errorReporter;

    protected boolean hasFeature(Context cx, int featureIndex)
    {
        switch (featureIndex) {
          case Context.FEATURE_STRICT_VARS:
          case Context.FEATURE_STRICT_EVAL:
            return strictMode;
        }
        return super.hasFeature(cx, featureIndex);
    }

    protected void onContextCreated(Context cx)
    {
        cx.setLanguageVersion(languageVersion);
        cx.setOptimizationLevel(optimizationLevel);
        if (errorReporter != null) {
            cx.setErrorReporter(errorReporter);
        }
        super.onContextCreated(cx);
    }

    public void setStrictMode(boolean flag)
    {
        checkNotSealed();
        this.strictMode = flag;
    }

    public void setLanguageVersion(int version)
    {
        Context.checkLanguageVersion(version);
        checkNotSealed();
        this.languageVersion = version;
    }

    public void setOptimizationLevel(int optimizationLevel)
    {
        Context.checkOptimizationLevel(optimizationLevel);
        checkNotSealed();
        this.optimizationLevel = optimizationLevel;
    }

    public void setErrorReporter(ErrorReporter errorReporter)
    {
        if (errorReporter == null) throw new IllegalArgumentException();
        this.errorReporter = errorReporter;
    }

}