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.lang.reflect.Array;
import javax.management.openmbean.*;
import org.json.simple.JSONArray;
import org.json.simple.JSONAware;
/**
* Converter for {@link ArrayType}
*
* @author roland
* @since 28.09.11
*/
class ArrayTypeConverter extends OpenTypeConverter<ArrayType> {
/**
* Constructor
* @param pDispatcher parent converter used for recursively converting
*/
ArrayTypeConverter(OpenTypeConverter pDispatcher) {
super(pDispatcher);
}
/** {@inheritDoc} */
@Override
public boolean canConvert(OpenType pType) {
return pType instanceof ArrayType<?>;
}
/** {@inheritDoc} */
@Override
public Object convertToObject(ArrayType type, Object pFrom) {
JSONAware value = toJSON(pFrom);
// prepare each value in the array and then process the array of values
if (!(value instanceof JSONArray)) {
throw new IllegalArgumentException(
"Can not convert " + value + " to type " +
type + " because JSON object type " + value.getClass() + " is not a JSONArray");
}
JSONArray jsonArray = (JSONArray) value;
OpenType elementOpenType = type.getElementOpenType();
Object[] valueArray = createTargetArray(elementOpenType, jsonArray.size());
int i = 0;
for (Object element : jsonArray) {
valueArray[i++] = getDispatcher().convertToObject(elementOpenType, element);
}
return valueArray;
}
// =======================================================================
private Object[] createTargetArray(OpenType pElementType, int pLength) {
if (pElementType instanceof SimpleType) {
try {
SimpleType simpleType = (SimpleType) pElementType;
Class elementClass = Class.forName(simpleType.getClassName());
return (Object[]) Array.newInstance(elementClass, pLength);
} catch (ClassNotFoundException e) {
throw new IllegalArgumentException("Can't find class " + pElementType.getClassName() +
" for instantiating array: " + e.getMessage(),e);
}
} else if (pElementType instanceof CompositeType) {
return new CompositeData[pLength];
} else {
throw new UnsupportedOperationException("Unsupported array element type: " + pElementType);
}
}
}