1 files changed, 361 insertions, 0 deletions
diff --git a/java/broker/src/main/java/org/apache/qpid/server/util/MapValueConverter.java b/java/broker/src/main/java/org/apache/qpid/server/util/MapValueConverter.java
new file mode 100644
index 0000000000..aa7b4afcae
--- /dev/null
+++ b/java/broker/src/main/java/org/apache/qpid/server/util/MapValueConverter.java
@@ -0,0 +1,361 @@
+/*
+ *
+ * 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.qpid.server.util;
+
+import java.util.Collection;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Set;
+
+public class MapValueConverter
+{
+
+    public static String getStringAttribute(String name, Map<String,Object> attributes, String defaultVal)
+    {
+        final Object value = attributes.get(name);
+        return toString(value, defaultVal);
+    }
+
+    public static String toString(final Object value)
+    {
+        return toString(value, null);
+    }
+
+    public static String toString(final Object value, String defaultVal)
+    {
+        if (value == null)
+        {
+            return defaultVal;
+        }
+        else if (value instanceof String)
+        {
+            return (String)value;
+        }
+        return String.valueOf(value);
+    }
+
+    public static String getStringAttribute(String name, Map<String, Object> attributes)
+    {
+        assertMandatoryAttribute(name, attributes);
+        return getStringAttribute(name, attributes, null);
+    }
+
+    private static void assertMandatoryAttribute(String name, Map<String, Object> attributes)
+    {
+        if (!attributes.containsKey(name))
+        {
+            throw new IllegalArgumentException("Value for attribute " + name + " is not found");
+        }
+    }
+
+    public static Map<String,Object> getMapAttribute(String name, Map<String,Object> attributes, Map<String,Object> defaultVal)
+    {
+        final Object value = attributes.get(name);
+        if(value == null)
+        {
+            return defaultVal;
+        }
+        else if(value instanceof Map)
+        {
+            @SuppressWarnings("unchecked")
+            Map<String,Object> retVal = (Map<String,Object>) value;
+            return retVal;
+        }
+        else
+        {
+            throw new IllegalArgumentException("Value for attribute " + name + " is not of required type Map");
+        }
+    }
+
+
+    @SuppressWarnings({ "unchecked", "rawtypes" })
+    public static <E extends Enum> E getEnumAttribute(Class<E> clazz, String name, Map<String,Object> attributes, E defaultVal)
+    {
+        Object obj = attributes.get(name);
+        if(obj == null)
+        {
+            return defaultVal;
+        }
+        else if(clazz.isInstance(obj))
+        {
+            return (E) obj;
+        }
+        else if(obj instanceof String)
+        {
+            return (E) Enum.valueOf(clazz, (String)obj);
+        }
+        else
+        {
+            throw new IllegalArgumentException("Value for attribute " + name + " is not of required type " + clazz.getSimpleName());
+        }
+    }
+
+    public static <E extends Enum<?>> E getEnumAttribute(Class<E> clazz, String name, Map<String,Object> attributes)
+    {
+        assertMandatoryAttribute(name, attributes);
+        return getEnumAttribute(clazz, name, attributes, null);
+    }
+
+    @SuppressWarnings({ "unchecked" })
+    public static <T extends Enum<T>> T toEnum(String name, Object rawValue, Class<T> enumType)
+    {
+        if (enumType.isInstance(rawValue))
+        {
+            return (T) rawValue;
+        }
+        else if (rawValue instanceof String)
+        {
+            return (T) Enum.valueOf(enumType, (String) rawValue);
+        }
+        else
+        {
+            throw new IllegalArgumentException("Value for attribute " + name + " is not of required type "
+                    + enumType.getSimpleName());
+        }
+    }
+
+    public static Boolean getBooleanAttribute(String name, Map<String,Object> attributes, Boolean defaultValue)
+    {
+        Object obj = attributes.get(name);
+        return toBoolean(name, obj, defaultValue);
+    }
+
+    public static Boolean toBoolean(String name, Object obj)
+    {
+        return toBoolean(name, obj, null);
+    }
+
+    public static Boolean toBoolean(String name, Object obj, Boolean defaultValue)
+    {
+        if(obj == null)
+        {
+            return defaultValue;
+        }
+        else if(obj instanceof Boolean)
+        {
+            return (Boolean) obj;
+        }
+        else if(obj instanceof String)
+        {
+            return Boolean.parseBoolean((String) obj);
+        }
+        else
+        {
+            throw new IllegalArgumentException("Value for attribute " + name + " is not of required type Boolean");
+        }
+    }
+
+
+    public static boolean getBooleanAttribute(String name, Map<String, Object> attributes)
+    {
+        assertMandatoryAttribute(name, attributes);
+        return getBooleanAttribute(name, attributes, null);
+    }
+
+    public static Integer getIntegerAttribute(String name, Map<String,Object> attributes, Integer defaultValue)
+    {
+        Object obj = attributes.get(name);
+        return toInteger(name, obj, defaultValue);
+    }
+
+    public static Integer toInteger(String name, Object obj)
+    {
+        return toInteger(name, obj, null);
+    }
+
+    public static Integer toInteger(String name, Object obj, Integer defaultValue)
+    {
+        if(obj == null)
+        {
+            return defaultValue;
+        }
+        else if(obj instanceof Number)
+        {
+            return ((Number) obj).intValue();
+        }
+        else if(obj instanceof String)
+        {
+            return Integer.valueOf((String) obj);
+        }
+        else
+        {
+            throw new IllegalArgumentException("Value for attribute " + name + " is not of required type Integer");
+        }
+    }
+
+    public static Integer getIntegerAttribute(String name, Map<String,Object> attributes)
+    {
+        assertMandatoryAttribute(name, attributes);
+        return getIntegerAttribute(name, attributes, null);
+    }
+
+    public static Long getLongAttribute(String name, Map<String,Object> attributes, Long defaultValue)
+    {
+        Object obj = attributes.get(name);
+        return toLong(name, obj, defaultValue);
+    }
+
+    public static Long toLong(String name, Object obj)
+    {
+        return toLong(name, obj, null);
+    }
+
+    public static Long toLong(String name, Object obj, Long defaultValue)
+    {
+        if(obj == null)
+        {
+            return defaultValue;
+        }
+        else if(obj instanceof Number)
+        {
+            return ((Number) obj).longValue();
+        }
+        else if(obj instanceof String)
+        {
+            return Long.valueOf((String) obj);
+        }
+        else
+        {
+            throw new IllegalArgumentException("Value for attribute " + name + " is not of required type Long");
+        }
+    }
+
+    public static <T> Set<T> getSetAttribute(String name, Map<String,Object> attributes)
+    {
+        assertMandatoryAttribute(name, attributes);
+        return getSetAttribute(name, attributes, Collections.<T>emptySet());
+    }
+
+    @SuppressWarnings("unchecked")
+    public static <T> Set<T> getSetAttribute(String name, Map<String,Object> attributes, Set<T> defaultValue)
+    {
+        Object obj = attributes.get(name);
+        if(obj == null)
+        {
+            return defaultValue;
+        }
+        else if(obj instanceof Set)
+        {
+            return (Set<T>) obj;
+        }
+        else
+        {
+            throw new IllegalArgumentException("Value for attribute " + name + " is not of required type Set");
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    public static <T extends Enum<T>> Set<T> getEnumSetAttribute(String name, Map<String, Object> attributes, Class<T> clazz)
+    {
+        Object obj = attributes.get(name);
+        Object[] items = null;
+        if (obj == null)
+        {
+            return null;
+        }
+        else if (obj instanceof Collection)
+        {
+            Collection<?> data = (Collection<?>) obj;
+            items = data.toArray(new Object[data.size()]);
+        }
+        else if (obj instanceof String[])
+        {
+            items = (String[]) obj;
+        }
+        else if (obj instanceof Object[])
+        {
+            items = (Object[]) obj;
+        }
+        else
+        {
+            throw new IllegalArgumentException("Value for attribute " + name + "[" + obj
+                    + "] cannot be converted into set of enum of " + clazz);
+        }
+        Set<T> set = new HashSet<T>();
+        for (int i = 0; i < items.length; i++)
+        {
+            T item = null;
+            Object value = items[i];
+            if (value instanceof String)
+            {
+                item = (T) Enum.valueOf(clazz, (String) value);
+            }
+            else if (clazz.isInstance(value))
+            {
+                item = (T) value;
+            }
+            else
+            {
+                throw new IllegalArgumentException("Cannot convert " + value + " from [" + obj + "] into enum of " + clazz
+                        + " for attribute " + name);
+            }
+            set.add(item);
+        }
+        return set;
+    }
+
+    @SuppressWarnings("unchecked")
+    public static Map<String, Object> convert(Map<String, Object> configurationAttributes, Map<String, Class<?>> attributeTypes)
+    {
+        Map<String, Object> attributes = new HashMap<String, Object>();
+        for (Map.Entry<String, Class<?>> attributeEntry : attributeTypes.entrySet())
+        {
+            String attributeName = attributeEntry.getKey();
+            if (configurationAttributes.containsKey(attributeName))
+            {
+                Class<?> classObject = attributeEntry.getValue();
+                Object rawValue = configurationAttributes.get(attributeName);
+                Object value = null;
+                if (classObject == Long.class || classObject == long.class)
+                {
+                    value = toLong(attributeName, rawValue);
+                }
+                else if (classObject == Integer.class || classObject == int.class)
+                {
+                    value = toInteger(attributeName, rawValue);
+                }
+                else if (classObject == Boolean.class || classObject == boolean.class)
+                {
+                    value = toBoolean(attributeName, rawValue);
+                }
+                else if (classObject == String.class)
+                {
+                    value = toString(rawValue);
+                }
+                else if (Enum.class.isAssignableFrom(classObject))
+                {
+                    @SuppressWarnings("rawtypes")
+                    Class<Enum> enumType = (Class<Enum>)classObject;
+                    value = toEnum(attributeName, rawValue, enumType);
+                }
+                else
+                {
+                    throw new IllegalArgumentException("Cannot convert '" + rawValue + "' into " + classObject);
+                }
+                attributes.put(attributeName, value);
+            }
+        }
+        return attributes;
+    }
+
+}