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jaxp/src/share/classes/javax/xml/stream/SecuritySupport.java

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+/*
+ * Copyright 2006 Sun Microsystems, Inc.  All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+package javax.xml.stream;
+
+import java.security.*;
+import java.net.*;
+import java.io.*;
+import java.util.*;
+
+/**
+ * This class is duplicated for each JAXP subpackage so keep it in sync.
+ * It is package private and therefore is not exposed as part of the JAXP
+ * API.
+ *
+ * Security related methods that only work on J2SE 1.2 and newer.
+ */
+class SecuritySupport  {
+
+
+    ClassLoader getContextClassLoader() throws SecurityException{
+        return (ClassLoader)
+                AccessController.doPrivileged(new PrivilegedAction() {
+            public Object run() {
+                ClassLoader cl = null;
+                //try {
+                cl = Thread.currentThread().getContextClassLoader();
+                //} catch (SecurityException ex) { }
+
+                if (cl == null)
+                    cl = ClassLoader.getSystemClassLoader();
+
+                return cl;
+            }
+        });
+    }
+
+    String getSystemProperty(final String propName) {
+        return (String)
+            AccessController.doPrivileged(new PrivilegedAction() {
+                public Object run() {
+                    return System.getProperty(propName);
+                }
+            });
+    }
+
+    FileInputStream getFileInputStream(final File file)
+        throws FileNotFoundException
+    {
+        try {
+            return (FileInputStream)
+                AccessController.doPrivileged(new PrivilegedExceptionAction() {
+                    public Object run() throws FileNotFoundException {
+                        return new FileInputStream(file);
+                    }
+                });
+        } catch (PrivilegedActionException e) {
+            throw (FileNotFoundException)e.getException();
+        }
+    }
+
+    InputStream getResourceAsStream(final ClassLoader cl,
+                                           final String name)
+    {
+        return (InputStream)
+            AccessController.doPrivileged(new PrivilegedAction() {
+                public Object run() {
+                    InputStream ris;
+                    if (cl == null) {
+                        ris = ClassLoader.getSystemResourceAsStream(name);
+                    } else {
+                        ris = cl.getResourceAsStream(name);
+                    }
+                    return ris;
+                }
+            });
+    }
+
+    boolean doesFileExist(final File f) {
+    return ((Boolean)
+            AccessController.doPrivileged(new PrivilegedAction() {
+                public Object run() {
+                    return new Boolean(f.exists());
+                }
+            })).booleanValue();
+    }
+
+}