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Diffstat (limited to 'src/share/classes/sun/corba/Bridge.java')
| -rw-r--r-- | src/share/classes/sun/corba/Bridge.java | 368 |
1 files changed, 0 insertions, 368 deletions
diff --git a/src/share/classes/sun/corba/Bridge.java b/src/share/classes/sun/corba/Bridge.java deleted file mode 100644 index 987ee09..0000000 --- a/src/share/classes/sun/corba/Bridge.java +++ /dev/null @@ -1,368 +0,0 @@ -/* - * Copyright (c) 2004, 2010, Oracle and/or its affiliates. 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. Oracle designates this - * particular file as subject to the "Classpath" exception as provided - * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA - * or visit www.oracle.com if you need additional information or have any - * questions. - */ - -package sun.corba ; - -import java.lang.reflect.Field ; -import java.lang.reflect.Method ; -import java.lang.reflect.Constructor ; -import java.lang.reflect.InvocationTargetException ; - -import java.io.ObjectInputStream ; - -import java.security.AccessController; -import java.security.Permission; -import java.security.PrivilegedAction; - -import sun.misc.Unsafe ; -import sun.reflect.ReflectionFactory ; - -/** This class provides the methods for fundamental JVM operations - * needed in the ORB that are not part of the public Java API. This includes: - * <ul> - * <li>throwException, which can throw undeclared checked exceptions. - * This is needed to handle throwing arbitrary exceptions across a standardized OMG interface that (incorrectly) does not specify appropriate exceptions.</li> - * <li>putXXX/getXXX methods that allow unchecked access to fields of objects. - * This is used for setting uninitialzed non-static final fields (which is - * impossible with reflection) and for speed.</li> - * <li>objectFieldOffset to obtain the field offsets for use in the putXXX/getXXX methods</li> - * <li>newConstructorForSerialization to get the special constructor required for a - * Serializable class</li> - * <li>latestUserDefinedLoader to get the latest user defined class loader from - * the call stack as required by the RMI-IIOP specification (really from the - * JDK 1.1 days)</li> - * </ul> - * The code that calls Bridge.get() must have the following Permissions: - * <ul> - * <li>RuntimePermission "reflectionFactoryAccess"</li> - * <li>BridgePermission "getBridge"</li> - * <li>ReflectPermission "suppressAccessChecks"</li> - * </ul> - * <p> - * All of these permissions are required to obtain and correctly initialize - * the instance of Bridge. No security checks are performed on calls - * made to Bridge instance methods, so access to the Bridge instance - * must be protected. - * <p> - * This class is a singleton (per ClassLoader of course). Access to the - * instance is obtained through the Bridge.get() method. - */ -public final class Bridge -{ - private static final Class[] NO_ARGS = new Class[] {}; - private static final Permission getBridgePermission = - new BridgePermission( "getBridge" ) ; - private static Bridge bridge = null ; - - // latestUserDefinedLoader() is a private static method - // in ObjectInputStream in JDK 1.3 through 1.5. - // We use reflection in a doPrivileged block to get a - // Method reference and make it accessible. - private final Method latestUserDefinedLoaderMethod ; - private final Unsafe unsafe ; - private final ReflectionFactory reflectionFactory ; - - private Method getLatestUserDefinedLoaderMethod() - { - return (Method) AccessController.doPrivileged( - new PrivilegedAction() - { - public Object run() - { - Method result = null; - - try { - Class io = ObjectInputStream.class; - result = io.getDeclaredMethod( - "latestUserDefinedLoader", NO_ARGS); - result.setAccessible(true); - } catch (NoSuchMethodException nsme) { - Error err = new Error( "java.io.ObjectInputStream" + - " latestUserDefinedLoader " + nsme ); - err.initCause(nsme) ; - throw err ; - } - - return result; - } - } - ); - } - - private Unsafe getUnsafe() { - Field fld = (Field)AccessController.doPrivileged( - new PrivilegedAction() - { - public Object run() - { - Field fld = null ; - - try { - Class unsafeClass = sun.misc.Unsafe.class ; - fld = unsafeClass.getDeclaredField( "theUnsafe" ) ; - fld.setAccessible( true ) ; - return fld ; - } catch (NoSuchFieldException exc) { - Error err = new Error( "Could not access Unsafe" ) ; - err.initCause( exc ) ; - throw err ; - } - } - } - ) ; - - Unsafe unsafe = null; - - try { - unsafe = (Unsafe)(fld.get( null )) ; - } catch (Throwable t) { - Error err = new Error( "Could not access Unsafe" ) ; - err.initCause( t ) ; - throw err ; - } - - return unsafe ; - } - - - private Bridge() - { - latestUserDefinedLoaderMethod = getLatestUserDefinedLoaderMethod(); - unsafe = getUnsafe() ; - reflectionFactory = (ReflectionFactory)AccessController.doPrivileged( - new ReflectionFactory.GetReflectionFactoryAction()); - } - - /** Fetch the Bridge singleton. This requires the following - * permissions: - * <ul> - * <li>RuntimePermission "reflectionFactoryAccess"</li> - * <li>BridgePermission "getBridge"</li> - * <li>ReflectPermission "suppressAccessChecks"</li> - * </ul> - * @return The singleton instance of the Bridge class - * @throws SecurityException if the caller does not have the - * required permissions and the caller has a non-null security manager. - */ - public static final synchronized Bridge get() - { - SecurityManager sman = System.getSecurityManager() ; - if (sman != null) - sman.checkPermission( getBridgePermission ) ; - - if (bridge == null) { - bridge = new Bridge() ; - } - - return bridge ; - } - - /** Obtain the latest user defined ClassLoader from the call stack. - * This is required by the RMI-IIOP specification. - */ - public final ClassLoader getLatestUserDefinedLoader() - { - try { - // Invoke the ObjectInputStream.latestUserDefinedLoader method - return (ClassLoader)latestUserDefinedLoaderMethod.invoke(null, - (Object[])NO_ARGS); - } catch (InvocationTargetException ite) { - Error err = new Error( - "sun.corba.Bridge.latestUserDefinedLoader: " + ite ) ; - err.initCause( ite ) ; - throw err ; - } catch (IllegalAccessException iae) { - Error err = new Error( - "sun.corba.Bridge.latestUserDefinedLoader: " + iae ) ; - err.initCause( iae ) ; - throw err ; - } - } - - /** - * Fetches a field element within the given - * object <code>o</code> at the given offset. - * The result is undefined unless the offset was obtained from - * {@link #objectFieldOffset} on the {@link java.lang.reflect.Field} - * of some Java field and the object referred to by <code>o</code> - * is of a class compatible with that field's class. - * @param o Java heap object in which the field from which the offset - * was obtained resides - * @param offset indication of where the field resides in a Java heap - * object - * @return the value fetched from the indicated Java field - * @throws RuntimeException No defined exceptions are thrown, not even - * {@link NullPointerException} - */ - public final int getInt(Object o, long offset) - { - return unsafe.getInt( o, offset ) ; - } - - /** - * Stores a value into a given Java field. - * <p> - * The first two parameters are interpreted exactly as with - * {@link #getInt(Object, long)} to refer to a specific - * Java field. The given value is stored into that field. - * <p> - * The field must be of the same type as the method - * parameter <code>x</code>. - * - * @param o Java heap object in which the field resides, if any, else - * null - * @param offset indication of where the field resides in a Java heap - * object. - * @param x the value to store into the indicated Java field - * @throws RuntimeException No defined exceptions are thrown, not even - * {@link NullPointerException} - */ - public final void putInt(Object o, long offset, int x) - { - unsafe.putInt( o, offset, x ) ; - } - - /** - * @see #getInt(Object, long) - */ - public final Object getObject(Object o, long offset) - { - return unsafe.getObject( o, offset ) ; - } - - /** - * @see #putInt(Object, long, int) - */ - public final void putObject(Object o, long offset, Object x) - { - unsafe.putObject( o, offset, x ) ; - } - - /** @see #getInt(Object, long) */ - public final boolean getBoolean(Object o, long offset) - { - return unsafe.getBoolean( o, offset ) ; - } - /** @see #putInt(Object, long, int) */ - public final void putBoolean(Object o, long offset, boolean x) - { - unsafe.putBoolean( o, offset, x ) ; - } - /** @see #getInt(Object, long) */ - public final byte getByte(Object o, long offset) - { - return unsafe.getByte( o, offset ) ; - } - /** @see #putInt(Object, long, int) */ - public final void putByte(Object o, long offset, byte x) - { - unsafe.putByte( o, offset, x ) ; - } - /** @see #getInt(Object, long) */ - public final short getShort(Object o, long offset) - { - return unsafe.getShort( o, offset ) ; - } - /** @see #putInt(Object, long, int) */ - public final void putShort(Object o, long offset, short x) - { - unsafe.putShort( o, offset, x ) ; - } - /** @see #getInt(Object, long) */ - public final char getChar(Object o, long offset) - { - return unsafe.getChar( o, offset ) ; - } - /** @see #putInt(Object, long, int) */ - public final void putChar(Object o, long offset, char x) - { - unsafe.putChar( o, offset, x ) ; - } - /** @see #getInt(Object, long) */ - public final long getLong(Object o, long offset) - { - return unsafe.getLong( o, offset ) ; - } - /** @see #putInt(Object, long, int) */ - public final void putLong(Object o, long offset, long x) - { - unsafe.putLong( o, offset, x ) ; - } - /** @see #getInt(Object, long) */ - public final float getFloat(Object o, long offset) - { - return unsafe.getFloat( o, offset ) ; - } - /** @see #putInt(Object, long, int) */ - public final void putFloat(Object o, long offset, float x) - { - unsafe.putFloat( o, offset, x ) ; - } - /** @see #getInt(Object, long) */ - public final double getDouble(Object o, long offset) - { - return unsafe.getDouble( o, offset ) ; - } - /** @see #putInt(Object, long, int) */ - public final void putDouble(Object o, long offset, double x) - { - unsafe.putDouble( o, offset, x ) ; - } - - /** - * This constant differs from all results that will ever be returned from - * {@link #objectFieldOffset}. - */ - public static final long INVALID_FIELD_OFFSET = -1; - - /** - * Returns the offset of a non-static field. - */ - public final long objectFieldOffset(Field f) - { - return unsafe.objectFieldOffset( f ) ; - } - - /** Throw the exception. - * The exception may be an undeclared checked exception. - */ - public final void throwException(Throwable ee) - { - unsafe.throwException( ee ) ; - } - - /** Obtain a constructor for Class cl using constructor cons which - * may be the constructor defined in a superclass of cl. This is - * used to create a constructor for Serializable classes that - * constructs an instance of the Serializable class using the - * no args constructor of the first non-Serializable superclass - * of the Serializable class. - */ - public final Constructor newConstructorForSerialization( Class cl, - Constructor cons ) - { - return reflectionFactory.newConstructorForSerialization( cl, cons ) ; - } -} |