8187443: Forest Consolidation: Move files to unified layout

Reviewed-by: darcy, ihse

src/java.management/share/classes/javax/management/ClassAttributeValueExp.java

@@ -0,0 +1,142 @@
+/*
+ * Copyright (c) 1999, 2006, 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 javax.management;
+
+import java.security.AccessController;
+
+import com.sun.jmx.mbeanserver.GetPropertyAction;
+
+/**
+ * This class represents the name of the Java implementation class of
+ * the MBean. It is used for performing queries based on the class of
+ * the MBean.
+ * @serial include
+ *
+ * <p>The <b>serialVersionUID</b> of this class is <code>-1081892073854801359L</code>.
+ *
+ * @since 1.5
+ */
+@SuppressWarnings("serial")  // serialVersionUID is not constant
+class ClassAttributeValueExp extends AttributeValueExp {
+
+    // Serialization compatibility stuff:
+    // Two serial forms are supported in this class. The selected form depends
+    // on system property "jmx.serial.form":
+    //  - "1.0" for JMX 1.0
+    //  - any other value for JMX 1.1 and higher
+    //
+    // Serial version for old serial form
+    private static final long oldSerialVersionUID = -2212731951078526753L;
+    //
+    // Serial version for new serial form
+    private static final long newSerialVersionUID = -1081892073854801359L;
+
+    private static final long serialVersionUID;
+    static {
+        boolean compat = false;
+        try {
+            GetPropertyAction act = new GetPropertyAction("jmx.serial.form");
+            String form = AccessController.doPrivileged(act);
+            compat = (form != null && form.equals("1.0"));
+        } catch (Exception e) {
+            // OK: exception means no compat with 1.0, too bad
+        }
+        if (compat)
+            serialVersionUID = oldSerialVersionUID;
+        else
+            serialVersionUID = newSerialVersionUID;
+    }
+
+    /**
+     * @serial The name of the attribute
+     *
+     * <p>The <b>serialVersionUID</b> of this class is <code>-1081892073854801359L</code>.
+     */
+    private String attr;
+
+    /**
+     * Basic Constructor.
+     */
+    public ClassAttributeValueExp() {
+        /* Compatibility: we have an attr field that we must hold on to
+           for serial compatibility, even though our parent has one too.  */
+        super("Class");
+        attr = "Class";
+    }
+
+
+    /**
+     * Applies the ClassAttributeValueExp on an MBean. Returns the name of
+     * the Java implementation class of the MBean.
+     *
+     * @param name The name of the MBean on which the ClassAttributeValueExp will be applied.
+     *
+     * @return  The ValueExp.
+     *
+     * @exception BadAttributeValueExpException
+     * @exception InvalidApplicationException
+     */
+    public ValueExp apply(ObjectName name)
+            throws BadStringOperationException, BadBinaryOpValueExpException,
+                   BadAttributeValueExpException, InvalidApplicationException {
+        // getAttribute(name);
+        Object result = getValue(name);
+        if  (result instanceof String) {
+            return new StringValueExp((String)result);
+        } else {
+            throw new BadAttributeValueExpException(result);
+        }
+    }
+
+    /**
+     * Returns the string "Class" representing its value
+     */
+    public String toString()  {
+        return attr;
+    }
+
+
+    protected Object getValue(ObjectName name) {
+        try {
+            // Get the class of the object
+            MBeanServer server = QueryEval.getMBeanServer();
+            return server.getObjectInstance(name).getClassName();
+        } catch (Exception re) {
+            return null;
+            /* In principle the MBean does exist because otherwise we
+               wouldn't be evaluating the query on it.  But it could
+               potentially have disappeared in between the time we
+               discovered it and the time the query is evaluated.
+
+               Also, the exception could be a SecurityException.
+
+               Returning null from here will cause
+               BadAttributeValueExpException, which will in turn cause
+               this MBean to be omitted from the query result.  */
+        }
+    }
+
+}