package org.jolokia.converter.object;
/*
* Copyright 2009-2011 Roland Huss
*
* Licensed 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.
*/
import java.util.HashMap;
import java.util.Map;
import javax.management.openmbean.*;
import org.json.simple.JSONAware;
import org.json.simple.JSONObject;
/**
* Converter for {@link CompositeType} objects
*
* @author roland
* @since 28.09.11
*/
class CompositeTypeConverter extends OpenTypeConverter<CompositeType> {
/**
* Constructor
* @param pDispatcher parent dispatcher for converting recursively
*/
CompositeTypeConverter(OpenTypeConverter pDispatcher) {
super(pDispatcher);
}
/** {@inheritDoc} */
@Override
boolean canConvert(OpenType pType) {
return pType instanceof CompositeType;
}
/** {@inheritDoc} */
@Override
Object convertToObject(CompositeType pType, Object pFrom) {
// break down the composite type to its field and recurse for converting each field
JSONAware value = toJSON(pFrom);
if (!(value instanceof JSONObject)) {
throw new IllegalArgumentException(
"Conversion of " + value + " to " +
pType + " failed because provided JSON type " + value.getClass() + " is not a JSONObject");
}
Map<String, Object> givenValues = (JSONObject) value;
Map<String, Object> compositeValues = new HashMap<String, Object>();
fillCompositeWithGivenValues(pType, compositeValues, givenValues);
completeCompositeValuesWithDefaults(pType, compositeValues);
try {
return new CompositeDataSupport(pType, compositeValues);
} catch (OpenDataException e) {
throw new IllegalArgumentException("Internal error: " + e.getMessage(),e);
}
}
// ========================================================================================
private void fillCompositeWithGivenValues(CompositeType pType, Map<String, Object> pCompositeValues, Map<String, Object> pSourceJson) {
for (Map.Entry<String,Object> entry : pSourceJson.entrySet()) {
String key = entry.getKey();
Object value = entry.getValue();
if (!pType.containsKey(key)) {
throw new IllegalArgumentException(
"Conversion to CompositeType failed because " + key + " is not known as composite attribute key.");
}
if (value != null) {
Object convertedValue = getDispatcher().convertToObject(pType.getType(key),value);
pCompositeValues.put(key, convertedValue);
}
}
}
private void completeCompositeValuesWithDefaults(CompositeType pType, Map<String, Object> pCompositeValues) {
/* fields that were not given in the JSON must be added with
* null for Objects and the default value for primitives
*/
for (String itemName : pType.keySet()) {
if (!pCompositeValues.containsKey(itemName)) {
Object itemValue = null;
OpenType itemType = pType.getType(itemName);
if (itemType instanceof SimpleType) {
SimpleType sType = (SimpleType) itemType;
itemValue = DEFAULT_PRIMITIVE_VALUES.get(sType.getClassName());
}
pCompositeValues.put(itemName, itemValue);
}
}
}
// List of default values to use
private static final Map<String, Object> DEFAULT_PRIMITIVE_VALUES = new HashMap<String, Object>();;
static {
DEFAULT_PRIMITIVE_VALUES.put(Boolean.class.getName(), false);
DEFAULT_PRIMITIVE_VALUES.put(Byte.class.getName(), 0);
DEFAULT_PRIMITIVE_VALUES.put(Character.class.getName(),'\u0000');
DEFAULT_PRIMITIVE_VALUES.put(Short.class.getName(), 0);
DEFAULT_PRIMITIVE_VALUES.put(Integer.class.getName(), 0);
DEFAULT_PRIMITIVE_VALUES.put(Long.class.getName(), 0L);
DEFAULT_PRIMITIVE_VALUES.put(Float.class.getName(), 0.0f);
DEFAULT_PRIMITIVE_VALUES.put(Double.class.getName(), 0.0d);
}
}