package net.kornan.framework.activeandroid.util;
/*
* Copyright (C) 2010 Michael Pardo
*
* 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.Field;
import java.lang.reflect.Modifier;
import java.util.Arrays;
import java.util.Collections;
import java.util.Comparator;
import java.util.LinkedHashSet;
import java.util.Set;
import net.kornan.framework.activeandroid.Model;
import net.kornan.framework.activeandroid.annotation.Column;
import net.kornan.framework.activeandroid.serializer.TypeSerializer;
import android.content.Context;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageManager;
public final class ReflectionUtils {
//////////////////////////////////////////////////////////////////////////////////////
// PUBLIC METHODS
//////////////////////////////////////////////////////////////////////////////////////
public static boolean isModel(Class<?> type) {
return isSubclassOf(type, Model.class) && (!Modifier.isAbstract(type.getModifiers()));
}
public static boolean isTypeSerializer(Class<?> type) {
return isSubclassOf(type, TypeSerializer.class);
}
// Meta-data
@SuppressWarnings("unchecked")
public static <T> T getMetaData(Context context, String name) {
try {
final ApplicationInfo ai = context.getPackageManager().getApplicationInfo(context.getPackageName(),
PackageManager.GET_META_DATA);
if (ai.metaData != null) {
return (T) ai.metaData.get(name);
}
}
catch (Exception e) {
Log.w("Couldn't find meta-data: " + name);
}
return null;
}
public static Set<Field> getDeclaredColumnFields(Class<?> type) {
Set<Field> declaredColumnFields = Collections.emptySet();
if (ReflectionUtils.isSubclassOf(type, Model.class) || Model.class.equals(type)) {
declaredColumnFields = new LinkedHashSet<Field>();
Field[] fields = type.getDeclaredFields();
Arrays.sort(fields, new Comparator<Field>() {
@Override
public int compare(Field field1, Field field2) {
return field2.getName().compareTo(field1.getName());
}
});
for (Field field : fields) {
if (field.isAnnotationPresent(Column.class)) {
declaredColumnFields.add(field);
}
}
Class<?> parentType = type.getSuperclass();
if (parentType != null) {
declaredColumnFields.addAll(getDeclaredColumnFields(parentType));
}
}
return declaredColumnFields;
}
//////////////////////////////////////////////////////////////////////////////////////
// PRIVATE METHODS
//////////////////////////////////////////////////////////////////////////////////////
public static boolean isSubclassOf(Class<?> type, Class<?> superClass) {
if (type.getSuperclass() != null) {
if (type.getSuperclass().equals(superClass)) {
return true;
}
return isSubclassOf(type.getSuperclass(), superClass);
}
return false;
}
}