svn commit: r1065049 - /commons/sandbox/digester3/trunk/src/main/java/org/apache/commons/digester3/ObjectCreateRule.java

[si...@apache.org]

Author: simonetripodi
Date: Sat Jan 29 16:00:24 2011
New Revision: 1065049

URL: http://svn.apache.org/viewvc?rev=1065049&view=rev
Log:
first checkin of ObjectCreateRule class, a tidy version of the proper one on /trunk

Added:
    commons/sandbox/digester3/trunk/src/main/java/org/apache/commons/digester3/ObjectCreateRule.java   (with props)

Added: commons/sandbox/digester3/trunk/src/main/java/org/apache/commons/digester3/ObjectCreateRule.java
URL: http://svn.apache.org/viewvc/commons/sandbox/digester3/trunk/src/main/java/org/apache/commons/digester3/ObjectCreateRule.java?rev=1065049&view=auto
==============================================================================
--- commons/sandbox/digester3/trunk/src/main/java/org/apache/commons/digester3/ObjectCreateRule.java (added)
+++ commons/sandbox/digester3/trunk/src/main/java/org/apache/commons/digester3/ObjectCreateRule.java Sat Jan 29 16:00:24 2011
@@ -0,0 +1,97 @@
+/* $Id$
+ *
+ * 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.commons.digester3;
+
+import org.xml.sax.Attributes;
+
+/**
+ * Rule implementation that creates a new object and pushes it
+ * onto the object stack.  When the element is complete, the
+ * object will be popped
+ */
+class ObjectCreateRule extends Rule {
+
+    /**
+     * The Java class name of the object to be created.
+     */
+    private final String className;
+
+    /**
+     * The attribute containing an override class name if it is present.
+     */
+    private final String attributeName; // @Nullable
+
+    /**
+     * 
+     *
+     * @param className The Java class name of the object to be created
+     * @param attributeName The attribute containing an override class name if it is present
+     */
+    public ObjectCreateRule(String className, String attributeName) {
+        this.className = className;
+        this.attributeName = attributeName;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public void begin(String namespace, String name, Attributes attributes) throws Exception {
+        // Identify the name of the class to instantiate
+        String realClassName = this.className;
+        if (this.attributeName != null) {
+            String value = attributes.getValue(this.attributeName);
+            if (value != null) {
+                realClassName = value;
+            }
+        }
+        if (this.getDigester().getLog().isDebugEnabled()) {
+            this.getDigester().getLog().debug(String.format("[ObjectCreateRule]{%s} New %s",
+                    this.getDigester().getMatch(),
+                    realClassName));
+        }
+
+        // Instantiate the new object and push it on the context stack
+        Class<?> clazz = this.getDigester().getClassLoader().loadClass(realClassName);
+        Object instance = clazz.newInstance();
+        this.getDigester().push(instance);
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public void end(String namespace, String name) throws Exception {
+        Object top = this.getDigester().pop();
+
+        if (this.getDigester().getLog().isDebugEnabled()) {
+            this.getDigester().getLog().debug(String.format("[ObjectCreateRule]{%s} Pop %s",
+                    this.getDigester().getMatch(),
+                    top.getClass().getName()));
+        }
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public String toString() {
+        return String.format("ObjectCreateRule[className=%s, attributeName=%s]", this.className, this.attributeName);
+    }
+
+}

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