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From dblev...@apache.org
Subject svn commit: r573346 - in /geronimo/server/branches/2.0/modules/geronimo-corba/src/main/java/org/apache/geronimo/corba/util: ClassLoading.java ObjectInputStreamExt.java Util.java
Date Thu, 06 Sep 2007 19:46:53 GMT
Author: dblevins
Date: Thu Sep  6 12:46:53 2007
New Revision: 573346

URL: http://svn.apache.org/viewvc?rev=573346&view=rev
Log:
Fix for GERONIMO-3459.  Moved copies of ObjectInputStreamExt and ClassLoading into geronimo-corba
-- the openejb copies have been deleted.  Note these classes exist somewhere in the geronimo
tree as well and could potentially be reused from there, though that might require adding
some dependencies.

Added:
    geronimo/server/branches/2.0/modules/geronimo-corba/src/main/java/org/apache/geronimo/corba/util/ClassLoading.java
    geronimo/server/branches/2.0/modules/geronimo-corba/src/main/java/org/apache/geronimo/corba/util/ObjectInputStreamExt.java
Modified:
    geronimo/server/branches/2.0/modules/geronimo-corba/src/main/java/org/apache/geronimo/corba/util/Util.java

Added: geronimo/server/branches/2.0/modules/geronimo-corba/src/main/java/org/apache/geronimo/corba/util/ClassLoading.java
URL: http://svn.apache.org/viewvc/geronimo/server/branches/2.0/modules/geronimo-corba/src/main/java/org/apache/geronimo/corba/util/ClassLoading.java?rev=573346&view=auto
==============================================================================
--- geronimo/server/branches/2.0/modules/geronimo-corba/src/main/java/org/apache/geronimo/corba/util/ClassLoading.java
(added)
+++ geronimo/server/branches/2.0/modules/geronimo-corba/src/main/java/org/apache/geronimo/corba/util/ClassLoading.java
Thu Sep  6 12:46:53 2007
@@ -0,0 +1,261 @@
+/**
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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.geronimo.corba.util;
+
+import java.lang.reflect.Array;
+import java.util.HashMap;
+
+/**
+ * Utility class for loading classes by a variety of name variations.
+ * <p/>
+ * Supported names types are:
+ * <p/>
+ * 1)  Fully qualified class name (e.g., "java.lang.String", "org.apache.geronimo.corba.util.ClassLoading"
+ * 2)  Method signature encoding ("Ljava.lang.String;", "J", "I", etc.)
+ * 3)  Primitive type names ("int", "boolean", etc.)
+ * 4)  Method array signature strings ("[I", "[Ljava.lang.String")
+ * 5)  Arrays using Java code format ("int[]", "java.lang.String[][]")
+ * <p/>
+ * The classes are loaded using the provided class loader.  For the basic types, the primitive
+ * reflection types are returned.
+ *
+ * @version $Rev: 450758 $
+ */
+public class ClassLoading {
+
+    /**
+     * Table for mapping primitive class names/signatures to the implementing
+     * class object
+     */
+    private static final HashMap PRIMITIVE_CLASS_MAP = new HashMap();
+
+    /**
+     * Table for mapping primitive classes back to their name signature type, which
+     * allows a reverse mapping to be performed from a class object into a resolvable
+     * signature.
+     */
+    private static final HashMap CLASS_TO_SIGNATURE_MAP = new HashMap();
+
+
+    /**
+     * Setup the primitives map.  We make any entry for each primitive class using both the
+     * human readable name and the method signature shorthand type.
+     */
+    static {
+        PRIMITIVE_CLASS_MAP.put("boolean", boolean.class);
+        PRIMITIVE_CLASS_MAP.put("Z", boolean.class);
+        PRIMITIVE_CLASS_MAP.put("byte", byte.class);
+        PRIMITIVE_CLASS_MAP.put("B", byte.class);
+        PRIMITIVE_CLASS_MAP.put("char", char.class);
+        PRIMITIVE_CLASS_MAP.put("C", char.class);
+        PRIMITIVE_CLASS_MAP.put("short", short.class);
+        PRIMITIVE_CLASS_MAP.put("S", short.class);
+        PRIMITIVE_CLASS_MAP.put("int", int.class);
+        PRIMITIVE_CLASS_MAP.put("I", int.class);
+        PRIMITIVE_CLASS_MAP.put("long", long.class);
+        PRIMITIVE_CLASS_MAP.put("J", long.class);
+        PRIMITIVE_CLASS_MAP.put("float", float.class);
+        PRIMITIVE_CLASS_MAP.put("F", float.class);
+        PRIMITIVE_CLASS_MAP.put("double", double.class);
+        PRIMITIVE_CLASS_MAP.put("D", double.class);
+        PRIMITIVE_CLASS_MAP.put("void", void.class);
+        PRIMITIVE_CLASS_MAP.put("V", void.class);
+
+        // Now build a reverse mapping table.  The table above has a many-to-one mapping
for
+        // class names.  To do the reverse, we need to pick just one.  As long as the
+        // returned name supports "round tripping" of the requests, this will work fine.
+
+        CLASS_TO_SIGNATURE_MAP.put(boolean.class, "Z");
+        CLASS_TO_SIGNATURE_MAP.put(byte.class, "B");
+        CLASS_TO_SIGNATURE_MAP.put(char.class, "C");
+        CLASS_TO_SIGNATURE_MAP.put(short.class, "S");
+        CLASS_TO_SIGNATURE_MAP.put(int.class, "I");
+        CLASS_TO_SIGNATURE_MAP.put(long.class, "J");
+        CLASS_TO_SIGNATURE_MAP.put(float.class, "F");
+        CLASS_TO_SIGNATURE_MAP.put(double.class, "D");
+        CLASS_TO_SIGNATURE_MAP.put(void.class, "V");
+    }
+
+
+    /**
+     * Load a class that matches the requested name, using the provided class loader context.
+     * <p/>
+     * The class name may be a standard class name, the name of a primitive type Java
+     * reflection class (e.g., "boolean" or "int"), or a type in method type signature
+     * encoding.  Array classes in either encoding form are also processed.
+     *
+     * @param className The name of the required class.
+     * @param classLoader The class loader used to resolve the class object.
+     * @return The Class object resolved from "className".
+     * @throws ClassNotFoundException When unable to resolve the class object.
+     * @throws IllegalArgumentException If either argument is null.
+     */
+    public static Class loadClass(String className, ClassLoader classLoader) throws ClassNotFoundException
{
+
+        // the tests require IllegalArgumentExceptions for null values on either of these.
+        if (className == null) {
+            throw new IllegalArgumentException("className is null");
+        }
+
+        if (classLoader == null) {
+            throw new IllegalArgumentException("classLoader is null");
+        }
+        // The easiest case is a proper class name.  We just have the class loader resolve
this.
+        // If the class loader throws a ClassNotFoundException, then we need to check each
of the
+        // special name encodings we support.
+        try {
+            return classLoader.loadClass(className);
+        } catch (ClassNotFoundException ignore) {
+            // if not found, continue on to the other name forms.
+        }
+
+
+        // The second easiest version to resolve is a direct map to a primitive type name
+        // or method signature.  Check our name-to-class map for one of those.
+        Class resolvedClass = (Class) PRIMITIVE_CLASS_MAP.get(className);
+        if (resolvedClass != null) {
+            return resolvedClass;
+        }
+
+        // Class names in method signature have the format "Lfully.resolved.name;",
+        // so if it ends in a semicolon and begins with an "L", this must be in
+        // this format.  Have the class loader try to load this.  There are no other
+        // options if this fails, so just allow the class loader to throw the
+        // ClassNotFoundException.
+        if (className.endsWith(";") && className.startsWith("L")) {
+            // pick out the name portion
+            String typeName = className.substring(1, className.length() - 1);
+            // and delegate the loading to the class loader.
+            return classLoader.loadClass(typeName);
+        }
+
+        // All we have left now are the array types.  Method signature array types
+        // have a series of leading "[" characters to specify the number of dimensions.
+        // The other array type we handle uses trailing "[]" for the dimensions, just
+        // like the Java language syntax.
+
+        // first check for the signature form ([[[[type).
+        if (className.charAt(0) == '[') {
+            // we have at least one array marker, now count how many leading '['s we have
+            // to get the dimension count.
+            int count = 0;
+            int nameLen = className.length();
+
+            while (count < nameLen && className.charAt(count) == '[') {
+                count++;
+            }
+
+            // pull of the name subtype, which is everything after the last '['
+            String arrayTypeName = className.substring(count, className.length());
+            // resolve the type using a recursive call, which will load any of the primitive
signature
+            // types as well as class names.
+            Class arrayType = loadClass(arrayTypeName, classLoader);
+
+            // Resolving array types require a little more work.  The array classes are
+            // created dynamically when the first instance of a given dimension and type
is
+            // created.  We need to create one using reflection to do this.
+            return getArrayClass(arrayType, count);
+        }
+
+
+        // ok, last chance.  Now check for an array specification in Java language
+        // syntax.  This will be a type name followed by pairs of "[]" to indicate
+        // the number of dimensions.
+        if (className.endsWith("[]")) {
+            // get the base component class name and the arrayDimensions
+            int count = 0;
+            int position = className.length();
+
+            while (position > 1 && className.substring(position - 2, position).equals("[]"))
{
+                // count this dimension
+                count++;
+                // and step back the probe position.
+                position -= 2;
+            }
+
+            // position now points at the location of the last successful test.  This makes
it
+            // easy to pick off the class name.
+
+            String typeName = className.substring(0, position);
+
+            // load the base type, again, doing this recursively
+            Class arrayType = loadClass(typeName, classLoader);
+            // and turn this into the class object
+            return getArrayClass(arrayType, count);
+        }
+
+        // We're out of options, just toss an exception over the wall.
+        throw new ClassNotFoundException(className);
+    }
+
+
+    /**
+     * Map a class object back to a class name.  The returned class object
+     * must be "round trippable", which means
+     * <p/>
+     * type == ClassLoading.loadClass(ClassLoading.getClassName(type), classLoader)
+     * <p/>
+     * must be true.  To ensure this, the class name is always returned in
+     * method signature format.
+     *
+     * @param type The class object we convert into name form.
+     * @return A string representation of the class name, in method signature
+     *         format.
+     */
+    public static String getClassName(Class type) {
+        StringBuffer name = new StringBuffer();
+
+        // we test these in reverse order from the resolution steps,
+        // first handling arrays, then primitive types, and finally
+        // "normal" class objects.
+
+        // First handle arrays.  If a class is an array, the type is
+        // element stored at that level.  So, for a 2-dimensional array
+        // of ints, the top-level type will be "[I".  We need to loop
+        // down the hierarchy until we hit a non-array type.
+        while (type.isArray()) {
+            // add another array indicator at the front of the name,
+            // and continue with the next type.
+            name.append('[');
+            type = type.getComponentType();
+        }
+
+        // we're down to the base type.  If this is a primitive, then
+        // we poke in the single-character type specifier.
+        if (type.isPrimitive()) {
+            name.append((String) CLASS_TO_SIGNATURE_MAP.get(type));
+        }
+        // a "normal" class.  This gets expressing using the "Lmy.class.name;" syntax.
+        else {
+            name.append('L');
+            name.append(type.getName());
+            name.append(';');
+        }
+        return name.toString();
+    }
+
+    private static Class getArrayClass(Class type, int dimension) {
+        // Array.newInstance() requires an array of the requested number of dimensions
+        // that gives the size for each dimension.  We just request 0 in each of the
+        // dimentions, which is not unlike a black hole sigularity.
+        int dimensions[] = new int[dimension];
+        // create an instance and return the associated class object.
+        return Array.newInstance(type, dimensions).getClass();
+    }
+}

Added: geronimo/server/branches/2.0/modules/geronimo-corba/src/main/java/org/apache/geronimo/corba/util/ObjectInputStreamExt.java
URL: http://svn.apache.org/viewvc/geronimo/server/branches/2.0/modules/geronimo-corba/src/main/java/org/apache/geronimo/corba/util/ObjectInputStreamExt.java?rev=573346&view=auto
==============================================================================
--- geronimo/server/branches/2.0/modules/geronimo-corba/src/main/java/org/apache/geronimo/corba/util/ObjectInputStreamExt.java
(added)
+++ geronimo/server/branches/2.0/modules/geronimo-corba/src/main/java/org/apache/geronimo/corba/util/ObjectInputStreamExt.java
Thu Sep  6 12:46:53 2007
@@ -0,0 +1,58 @@
+/**
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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.geronimo.corba.util;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.ObjectInputStream;
+import java.io.ObjectStreamClass;
+import java.lang.reflect.Proxy;
+
+/**
+ * @version $Rev: 450758 $ $Date: 2006-09-28 03:40:18 -0500 (Thu, 28 Sep 2006) $
+ */
+public class ObjectInputStreamExt extends ObjectInputStream {
+
+    private ClassLoader classloader;
+
+    public ObjectInputStreamExt(InputStream in, ClassLoader loader) throws IOException {
+        super(in);
+        this.classloader = loader;
+    }
+
+    protected Class resolveClass(ObjectStreamClass classDesc) throws IOException, ClassNotFoundException
{
+        return ClassLoading.loadClass(classDesc.getName(), classloader);
+    }
+
+    protected Class resolveProxyClass(String[] interfaces) throws IOException, ClassNotFoundException
{
+        Class[] cinterfaces = new Class[interfaces.length];
+        for (int i = 0; i < interfaces.length; i++)
+            cinterfaces[i] = classloader.loadClass(interfaces[i]);
+
+        try {
+            return Proxy.getProxyClass(classloader, cinterfaces);
+        } catch (IllegalArgumentException e) {
+            throw new ClassNotFoundException(null, e);
+        }
+    }
+
+    ClassLoader getClassloader() {
+        return classloader;
+    }
+
+}

Modified: geronimo/server/branches/2.0/modules/geronimo-corba/src/main/java/org/apache/geronimo/corba/util/Util.java
URL: http://svn.apache.org/viewvc/geronimo/server/branches/2.0/modules/geronimo-corba/src/main/java/org/apache/geronimo/corba/util/Util.java?rev=573346&r1=573345&r2=573346&view=diff
==============================================================================
--- geronimo/server/branches/2.0/modules/geronimo-corba/src/main/java/org/apache/geronimo/corba/util/Util.java
(original)
+++ geronimo/server/branches/2.0/modules/geronimo-corba/src/main/java/org/apache/geronimo/corba/util/Util.java
Thu Sep  6 12:46:53 2007
@@ -70,7 +70,6 @@
 import org.apache.openejb.ProxyInfo;
 import org.apache.openejb.spi.ApplicationServer;
 import org.apache.openejb.core.ServerFederation;
-import org.apache.openejb.util.ObjectInputStreamExt;
 
 /**
  * Various utility functions.



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