a

554325746@qq.com

2019-12-25 603cb36a5123e46656b06a5deb8d7ac7ff81307f

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package com.basic.security.widget.abslistview.base;
 
import android.support.v4.util.SparseArrayCompat;
 
import com.basic.security.widget.abslistview.ViewHolder;
 
public class ItemViewDelegateManager<T> {
    SparseArrayCompat<ItemViewDelegate<T>> delegates = new SparseArrayCompat();
 
    public int getItemViewDelegateCount() {
        return delegates.size();
    }
 
    public ItemViewDelegateManager<T> addDelegate(ItemViewDelegate<T> delegate) {
        int viewType = delegates.size();
        if (delegate != null) {
            delegates.put(viewType, delegate);
            viewType++;
        }
        return this;
    }
 
    public ItemViewDelegateManager<T> addDelegate(int viewType, ItemViewDelegate<T> delegate) {
        if (delegates.get(viewType) != null) {
            throw new IllegalArgumentException(
                    "An ItemViewDelegate is already registered for the viewType = "
                            + viewType
                            + ". Already registered ItemViewDelegate is "
                            + delegates.get(viewType));
        }
        delegates.put(viewType, delegate);
        return this;
    }
 
    public ItemViewDelegateManager<T> removeDelegate(ItemViewDelegate<T> delegate) {
        if (delegate == null) {
            throw new NullPointerException("ItemViewDelegate is null");
        }
        int indexToRemove = delegates.indexOfValue(delegate);
        if (indexToRemove >= 0) {
            delegates.removeAt(indexToRemove);
        }
        return this;
    }
 
    public ItemViewDelegateManager<T> removeDelegate(int itemType) {
        int indexToRemove = delegates.indexOfKey(itemType);
        if (indexToRemove >= 0) {
            delegates.removeAt(indexToRemove);
        }
        return this;
    }
 
    public int getItemViewType(T item, int position) {
        int delegatesCount = delegates.size();
        for (int i = delegatesCount - 1; i >= 0; i--) {
            ItemViewDelegate<T> delegate = delegates.valueAt(i);
            if (delegate.isForViewType(item, position)) {
                return delegates.keyAt(i);
            }
        }
        throw new IllegalArgumentException(
                "No ItemViewDelegate added that matches position=" + position + " in data source");
    }
 
    public void convert(ViewHolder holder, T item, int position) {
        int delegatesCount = delegates.size();
        for (int i = 0; i < delegatesCount; i++) {
            ItemViewDelegate<T> delegate = delegates.valueAt(i);
            if (delegate.isForViewType(item, position)) {
                delegate.convert(holder, item, position);
                return;
            }
        }
        throw new IllegalArgumentException(
                "No ItemViewDelegateManager added that matches position=" + position + " in data source");
    }
 
    public int getItemViewLayoutId(int viewType) {
        return delegates.get(viewType).getItemViewLayoutId();
    }
 
    public int getItemViewType(ItemViewDelegate itemViewDelegate) {
        return delegates.indexOfValue(itemViewDelegate);
    }
 
    public ItemViewDelegate getItemViewDelegate(T item, int position) {
        int delegatesCount = delegates.size();
        for (int i = delegatesCount - 1; i >= 0; i--) {
            ItemViewDelegate<T> delegate = delegates.valueAt(i);
            if (delegate.isForViewType(item, position)) {
                return delegate;
            }
        }
        throw new IllegalArgumentException(
                "No ItemViewDelegate added that matches position=" + position + " in data source");
    }
 
    public int getItemViewLayoutId(T item, int position) {
        return getItemViewDelegate(item, position).getItemViewLayoutId();
    }
}