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SlimAdapter.java
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SlimAdapter.java
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package net.idik.lib.slimadapter;
import android.os.Handler;
import android.os.Looper;
import android.os.Message;
import androidx.recyclerview.widget.DiffUtil;
import androidx.recyclerview.widget.RecyclerView;
import android.view.ViewGroup;
import net.idik.lib.slimadapter.diff.DefaultDiffCallback;
import net.idik.lib.slimadapter.diff.SlimDiffUtil;
import net.idik.lib.slimadapter.ex.loadmore.SlimExLoadMoreViewHolder;
import net.idik.lib.slimadapter.ex.loadmore.SlimMoreLoader;
import net.idik.lib.slimadapter.viewinjector.IViewInjector;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
/**
* Created by linshuaibin on 10/02/2017.
*/
public class SlimAdapter extends AbstractSlimAdapter {
private static final int WHAT_NOTIFY_DATA_SET_CHANGED = 1;
private final static int TYPE_LOAD_MORE = -10;
private SlimMoreLoader moreLoader;
protected SlimAdapter() {
}
public static SlimAdapter create() {
return new SlimAdapter();
}
public static <T extends SlimAdapter> T create(Class<T> clazz) {
try {
return clazz.newInstance();
} catch (InstantiationException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
}
return null;
}
private List<?> data;
private Handler uiHandler = new Handler(Looper.getMainLooper()) {
@Override
public void dispatchMessage(Message msg) {
switch (msg.what) {
case WHAT_NOTIFY_DATA_SET_CHANGED:
notifyDataSetChanged();
break;
}
super.dispatchMessage(msg);
}
};
public SlimAdapter updateData(List<?> data) {
if (moreLoader != null) {
moreLoader.reset();
}
if (diffCallback == null || getItemCount() == 0 || data == null || data.size() == 0) {
this.data = data;
if (Looper.myLooper() == Looper.getMainLooper()) {
notifyDataSetChanged();
} else {
uiHandler.removeMessages(WHAT_NOTIFY_DATA_SET_CHANGED);
uiHandler.sendEmptyMessage(WHAT_NOTIFY_DATA_SET_CHANGED);
}
} else {
DiffUtil.DiffResult diffResult = DiffUtil.calculateDiff(new SlimDiffUtil(this.data, data, diffCallback));
this.data = data;
if (Looper.myLooper() == Looper.getMainLooper()) {
diffResult.dispatchUpdatesTo(this);
} else {
uiHandler.removeMessages(WHAT_NOTIFY_DATA_SET_CHANGED);
uiHandler.sendEmptyMessage(WHAT_NOTIFY_DATA_SET_CHANGED);
}
}
return this;
}
public List<?> getData() {
return data;
}
@Override
public Object getItem(int position) {
if (moreLoader != null && position == data.size()) {
return moreLoader;
}
return data == null || data.size() <= position ? null : data.get(position);
}
@Override
public int getItemCount() {
return data == null ? 0 : data.size() + (moreLoader == null ? 0 : 1);
}
private List<Type> dataTypes = new ArrayList<>();
private Map<Type, IViewHolderCreator> creators = new HashMap<>();
private IViewHolderCreator defaultCreator = null;
private SlimDiffUtil.Callback diffCallback = null;
public SlimAdapter enableDiff() {
enableDiff(new DefaultDiffCallback());
return this;
}
public SlimAdapter enableDiff(SlimDiffUtil.Callback diffCallback) {
this.diffCallback = diffCallback;
return this;
}
@Override
public SlimViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
if (viewType == TYPE_LOAD_MORE) {
return new SlimExLoadMoreViewHolder(moreLoader.getLoadMoreView());
}
Type dataType = dataTypes.get(viewType);
IViewHolderCreator creator = creators.get(dataType);
if (creator == null) {
for (Type t : creators.keySet()) {
if (isTypeMatch(t, dataType)) {
creator = creators.get(t);
break;
}
}
}
if (creator == null) {
if (defaultCreator == null) {
throw new IllegalArgumentException(String.format("Neither the TYPE: %s not The DEFAULT injector found...", dataType));
}
creator = defaultCreator;
}
return creator.create(parent);
}
private boolean isTypeMatch(Type type, Type targetType) {
if (type instanceof Class && targetType instanceof Class) {
if (((Class) type).isAssignableFrom((Class) targetType)) {
return true;
}
} else if (type instanceof ParameterizedType && targetType instanceof ParameterizedType) {
ParameterizedType parameterizedType = (ParameterizedType) type;
ParameterizedType parameterizedTargetType = (ParameterizedType) targetType;
if (isTypeMatch(parameterizedType.getRawType(), ((ParameterizedType) targetType).getRawType())) {
Type[] types = parameterizedType.getActualTypeArguments();
Type[] targetTypes = parameterizedTargetType.getActualTypeArguments();
if (types == null || targetTypes == null || types.length != targetTypes.length) {
return false;
}
int len = types.length;
for (int i = 0; i < len; i++) {
if (!isTypeMatch(types[i], targetTypes[i])) {
return false;
}
}
return true;
}
}
return false;
}
public SlimAdapter registerDefault(final int layoutRes, final SlimInjector slimInjector) {
defaultCreator = new IViewHolderCreator() {
@Override
public SlimTypeViewHolder create(ViewGroup parent) {
return new SlimTypeViewHolder(parent, layoutRes) {
@Override
protected void onBind(Object data, IViewInjector injector) {
slimInjector.onInject(data, injector);
}
};
}
};
return this;
}
public <T> SlimAdapter register(final int layoutRes, final SlimInjector<T> slimInjector) {
Type type = getSlimInjectorActualTypeArguments(slimInjector);
if (type == null) {
throw new IllegalArgumentException();
}
creators.put(type, new IViewHolderCreator<T>() {
@Override
public SlimTypeViewHolder<T> create(ViewGroup parent) {
return new SlimTypeViewHolder<T>(parent, layoutRes) {
@Override
protected void onBind(T data, IViewInjector injector) {
slimInjector.onInject(data, injector);
}
};
}
});
return this;
}
private <T> Type getSlimInjectorActualTypeArguments(SlimInjector<T> slimInjector) {
Type[] interfaces = slimInjector.getClass().getGenericInterfaces();
for (Type type : interfaces) {
if (type instanceof ParameterizedType) {
if (((ParameterizedType) type).getRawType().equals(SlimInjector.class)) {
Type actualType = ((ParameterizedType) type).getActualTypeArguments()[0];
if (actualType instanceof Class) {
return actualType;
} else {
throw new IllegalArgumentException("The generic type argument of SlimInjector is NOT support Generic Parameterized Type now, Please using a WRAPPER class install of it directly.");
}
}
}
}
return null;
}
public SlimAdapter attachTo(RecyclerView... recyclerViews) {
for (RecyclerView recyclerView : recyclerViews) {
recyclerView.setAdapter(this);
}
return this;
}
@Override
public int getItemViewType(int position) {
if (moreLoader != null && position == data.size()) {
return TYPE_LOAD_MORE;
}
Object item = data.get(position);
int index = dataTypes.indexOf(item.getClass());
if (index == -1) {
dataTypes.add(item.getClass());
}
index = dataTypes.indexOf(item.getClass());
return index;
}
private interface IViewHolderCreator<T> {
SlimAdapter.SlimTypeViewHolder<T> create(ViewGroup parent);
}
public SlimAdapter enableLoadMore(SlimMoreLoader slimMoreLoader) {
this.moreLoader = slimMoreLoader;
slimMoreLoader.setSlimAdapter(this);
notifyDataSetChanged();
return this;
}
@Override
public void onAttachedToRecyclerView(RecyclerView recyclerView) {
super.onAttachedToRecyclerView(recyclerView);
if (moreLoader != null) {
recyclerView.addOnScrollListener(moreLoader);
}
}
@Override
public void onDetachedFromRecyclerView(RecyclerView recyclerView) {
if (moreLoader != null) {
recyclerView.removeOnScrollListener(moreLoader);
}
super.onDetachedFromRecyclerView(recyclerView);
}
private static abstract class SlimTypeViewHolder<T> extends SlimViewHolder<T> {
SlimTypeViewHolder(ViewGroup parent, int itemLayoutRes) {
super(parent, itemLayoutRes);
}
}
}