returning xstream factory bean (a bit modified), mistekanly deleted yesterday

git-svn-id: https://svn.apache.org/repos/asf/activemq/trunk@801197 13f79535-47bb-0310-9956-ffa450edef68

activemq-core/src/main/java/org/apache/activemq/util/XStreamFactoryBean.java

@@ -0,0 +1,122 @@
+/**
+ * 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.activemq.util;
+
+import java.util.Iterator;
+import java.util.Map;
+
+import org.springframework.beans.factory.FactoryBean;
+import org.springframework.beans.propertyeditors.ClassEditor;
+import org.springframework.util.Assert;
+
+import com.thoughtworks.xstream.XStream;
+import com.thoughtworks.xstream.converters.Converter;
+import com.thoughtworks.xstream.converters.ConverterMatcher;
+import com.thoughtworks.xstream.converters.SingleValueConverter;
+
+public class XStreamFactoryBean implements FactoryBean {
+
+	XStream xstream = new XStream();
+	
+    /**
+     * Sets the <code>Converters</code> or <code>SingleValueConverters</code> to be registered with the
+     * <code>XStream</code> instance.
+     *
+     * @see Converter
+     * @see SingleValueConverter
+     */
+    public void setConverters(ConverterMatcher[] converters) {
+        for (int i = 0; i < converters.length; i++) {
+            if (converters[i] instanceof Converter) {
+                xstream.registerConverter((Converter) converters[i], i);
+            }
+            else if (converters[i] instanceof SingleValueConverter) {
+                xstream.registerConverter((SingleValueConverter) converters[i], i);
+            }
+            else {
+                throw new IllegalArgumentException("Invalid ConverterMatcher [" + converters[i] + "]");
+            }
+        }
+    }
+
+    /**
+     * Set a alias/type map, consisting of string aliases mapped to <code>Class</code> instances (or Strings to be
+     * converted to <code>Class</code> instances).
+     *
+     * @see org.springframework.beans.propertyeditors.ClassEditor
+     */
+    public void setAliases(Map aliases) {
+        for (Iterator iterator = aliases.entrySet().iterator(); iterator.hasNext();) {
+            Map.Entry entry = (Map.Entry) iterator.next();
+            // Check whether we need to convert from String to Class.
+            Class type;
+            if (entry.getValue() instanceof Class) {
+                type = (Class) entry.getValue();
+            }
+            else {
+                ClassEditor editor = new ClassEditor();
+                editor.setAsText(String.valueOf(entry.getValue()));
+                type = (Class) editor.getValue();
+            }
+            xstream.alias((String) entry.getKey(), type);
+        }
+    }	
+    
+    /**
+     * Sets the XStream mode.
+     *
+     * @see XStream#XPATH_REFERENCES
+     * @see XStream#ID_REFERENCES
+     * @see XStream#NO_REFERENCES
+     */
+    public void setMode(int mode) {
+        xstream.setMode(mode);
+    }    
+    
+    /**
+     * Sets the classes, for which mappings will be read from class-level JDK 1.5+ annotation metadata.
+     *
+     * @see Annotations#configureAliases(XStream, Class[])
+     */
+    public void setAnnotatedClass(Class<?> annotatedClass) {
+        Assert.notNull(annotatedClass, "'annotatedClass' must not be null");
+        xstream.processAnnotations(annotatedClass);
+    }
+
+    /**
+     * Sets annotated classes, for which aliases will be read from class-level JDK 1.5+ annotation metadata.
+     *
+     * @see Annotations#configureAliases(XStream, Class[])
+     */
+    public void setAnnotatedClasses(Class<?>[] annotatedClasses) {
+        Assert.notEmpty(annotatedClasses, "'annotatedClasses' must not be empty");
+        xstream.processAnnotations(annotatedClasses);
+    }    
+	
+	public Object getObject() throws Exception {
+		return xstream;
+	}
+
+	public Class getObjectType() {
+		return XStream.class;
+	}
+
+	public boolean isSingleton() {
+		return true;
+	}
+
+}