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An implementation of OSGi Remote Service Admin, enhanced to provide support for OSGi Promises and streaming using OSGi PushStreams.

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/*
 Copyright 2008-2011 the original author or authors

 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.
 */

package org.freshvanilla.lang;

import java.lang.reflect.Field;
import java.lang.reflect.Modifier;
import java.util.LinkedHashMap;
import java.util.Map;

import org.freshvanilla.lang.misc.AccessUtils;

public class VanillaClass implements MetaClass {

    private final Class _clazz;
    private final String _nameWithParameters;
    private final MetaField[] _fields;
    private final boolean _definesEquals;
    private final Class _componentType;

    public VanillaClass(Class clazz) {
        _clazz = clazz;

        _fields = getFieldsForSerialization(clazz);

        StringBuilder sb = new StringBuilder(64);
        sb.append(clazz.getName());
        for (MetaField field : _fields) {
            sb.append(',').append(field.getName());
        }

        _nameWithParameters = sb.toString();
        _definesEquals = clazz.getName().startsWith("java") || clazz.getName().startsWith("com.sun.");
        _componentType = clazz.getComponentType();
    }

    @SuppressWarnings("unchecked")
    private static  MetaField[] getFieldsForSerialization(Class clazz) {
        Map> fieldMap = new LinkedHashMap>();
        getFieldsForSerialization0(fieldMap, clazz);
        return fieldMap.values().toArray(new MetaField[fieldMap.size()]);
    }

    @SuppressWarnings({"unchecked", "rawtypes"})
    private static  void getFieldsForSerialization0(Map> fieldMap, Class clazz) {
        if (clazz == null || clazz == Object.class) return;
        getFieldsForSerialization0(fieldMap, clazz.getSuperclass());
        for (Field field : clazz.getDeclaredFields()) {
            if ((field.getModifiers() & (Modifier.STATIC | Modifier.TRANSIENT)) != 0) continue;
            field.setAccessible(true);
            fieldMap.put(field.getName(), new VanillaField(field));
        }
    }

    public Class getType() {
        return _clazz;
    }

    public String nameWithParameters() {
        return _nameWithParameters;
    }

    public MetaField[] fields() {
        return _fields;
    }

    public T newInstance() throws InstantiationException {
        return AccessUtils.newInstance(_clazz);
    }

    public boolean definesEquals() {
        return _definesEquals;
    }

    public Class getComponentType() {
        return _componentType;
    }
}