com.pedrogomez.renderers.PagerRendererAdapter.java Source code

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Here is the source code for com.pedrogomez.renderers.PagerRendererAdapter.java

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/*
 * Copyright (C) 2014 Pedro Vicente Gmez Snchez.
 *
 * 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 com.pedrogomez.renderers;

import java.util.Collection;

import android.support.v4.view.PagerAdapter;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

import com.pedrogomez.renderers.exception.NullRendererBuiltException;

/**
 * Adaptation of Renderes API to PagerAdapter
 */
public class PagerRendererAdapter<T> extends PagerAdapter {

    private final RendererBuilder<T> rendererBuilder;
    private AdapteeCollection<T> collection;

    public PagerRendererAdapter(RendererBuilder<T> rendererBuilder, AdapteeCollection<T> collection) {
        this.rendererBuilder = rendererBuilder;
        this.collection = collection;
    }

    @Override
    public int getCount() {
        return collection.size();
    }

    protected AdapteeCollection<T> getCollection() {
        return collection;
    }

    public void add(T element) {
        collection.add(element);
    }

    public void addAll(Collection<? extends T> elements) {
        collection.addAll(elements);
    }

    public void remove(T element) {
        collection.remove(element);
    }

    public void removeAll(Collection<? extends T> elements) {
        collection.removeAll(elements);
    }

    public void clear() {
        collection.clear();
    }

    @Override
    public View instantiateItem(ViewGroup container, int position) {
        T content = getItem(position);
        rendererBuilder.withContent(content);
        rendererBuilder.withParent(container);
        rendererBuilder.withLayoutInflater(LayoutInflater.from(container.getContext()));
        Renderer<T> renderer = rendererBuilder.build();
        if (renderer == null) {
            throw new NullRendererBuiltException("RendererBuilder have to return a not null Renderer");
        }
        updateRendererExtraValues(content, renderer, position);
        renderer.render();
        renderer.getRootView().setTag(content);
        container.addView(renderer.getRootView());
        return renderer.getRootView();
    }

    @Override
    public void destroyItem(ViewGroup container, int position, Object object) {
        container.removeView((View) object);
    }

    @Override
    public boolean isViewFromObject(View view, Object object) {
        return view.equals(object);
    }

    protected void updateRendererExtraValues(T content, Renderer<T> renderer, int position) {

    }

    private T getItem(int position) {
        return collection.get(position);
    }
}