src/java.management/share/classes/javax/management/QualifiedAttributeValueExp.java
changeset 47216 71c04702a3d5
parent 25859 3317bb8137f4
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.management/share/classes/javax/management/QualifiedAttributeValueExp.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,122 @@
+/*
+ * Copyright (c) 1999, 2008, 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;
+
+
+/**
+ * <p>Represents attributes used as arguments to relational constraints,
+ * where the attribute must be in an MBean of a specified {@linkplain
+ * MBeanInfo#getClassName() class}. A QualifiedAttributeValueExp may be used
+ * anywhere a ValueExp is required.
+ *
+ * @serial include
+ *
+ * @since 1.5
+ */
+class QualifiedAttributeValueExp extends AttributeValueExp   {
+
+
+    /* Serial version */
+    private static final long serialVersionUID = 8832517277410933254L;
+
+    /**
+     * @serial The attribute class name
+     */
+    private String className;
+
+
+    /**
+     * Basic Constructor.
+     * @deprecated see {@link AttributeValueExp#AttributeValueExp()}
+     */
+    @Deprecated
+    public QualifiedAttributeValueExp() {
+    }
+
+    /**
+     * Creates a new QualifiedAttributeValueExp representing the specified object
+     * attribute, named attr with class name className.
+     */
+    public QualifiedAttributeValueExp(String className, String attr) {
+        super(attr);
+        this.className = className;
+    }
+
+
+    /**
+     * Returns a string representation of the class name of the attribute.
+     */
+    public String getAttrClassName()  {
+        return className;
+    }
+
+    /**
+     * Applies the QualifiedAttributeValueExp to an MBean.
+     *
+     * @param name The name of the MBean on which the QualifiedAttributeValueExp will be applied.
+     *
+     * @return  The ValueExp.
+     *
+     * @exception BadStringOperationException
+     * @exception BadBinaryOpValueExpException
+     * @exception BadAttributeValueExpException
+     * @exception InvalidApplicationException
+     */
+    @Override
+    public ValueExp apply(ObjectName name) throws BadStringOperationException, BadBinaryOpValueExpException,
+        BadAttributeValueExpException, InvalidApplicationException  {
+        try {
+            MBeanServer server = QueryEval.getMBeanServer();
+            String v = server.getObjectInstance(name).getClassName();
+
+            if (v.equals(className)) {
+                return super.apply(name);
+            }
+            throw new InvalidApplicationException("Class name is " + v +
+                                                  ", should be " + className);
+
+        } catch (Exception e) {
+            throw new InvalidApplicationException("Qualified attribute: " + e);
+            /* Can happen if MBean disappears between the time we
+               construct the list of MBeans to query and the time we
+               evaluate the query on this MBean, or if
+               getObjectInstance throws SecurityException.  */
+        }
+    }
+
+    /**
+     * Returns the string representing its value
+     */
+    @Override
+    public String toString()  {
+        if (className != null) {
+            return className + "." + super.toString();
+        } else {
+            return super.toString();
+        }
+    }
+
+}