org.robobinding.binder.BindingAttributeMappingsProviderResolver.java Source code

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Here is the source code for org.robobinding.binder.BindingAttributeMappingsProviderResolver.java

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/**
 * Copyright 2011 Cheng Wei, Robert Taylor
 *
 * 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.robobinding.binder;

import java.util.Queue;

import org.robobinding.attribute.PropertyAttributeParser;
import org.robobinding.customview.BindableView;
import org.robobinding.customview.CustomBindingAttributeMapperAdapter;
import org.robobinding.customview.CustomViewUtils;
import org.robobinding.viewattribute.BindingAttributeMappingsProvider;
import org.robobinding.viewattribute.impl.BindingAttributeMappingsProviderMap;

import android.view.View;

import com.google.common.collect.Lists;

/**
 * 
 * @since 1.0
 * @version $Revision: 1.0 $
 * @author Cheng Wei
 * @author Robert Taylor
 */
public class BindingAttributeMappingsProviderResolver {
    private final BindingAttributeMappingsProviderMap bindingAttributeMappingsProviderMap;
    private final PropertyAttributeParser propertyAttributeParser;

    public BindingAttributeMappingsProviderResolver(
            BindingAttributeMappingsProviderMap bindingAttributeMappingsProviderMap,
            PropertyAttributeParser propertyAttributeParser) {
        this.bindingAttributeMappingsProviderMap = bindingAttributeMappingsProviderMap;
        this.propertyAttributeParser = propertyAttributeParser;
    }

    @SuppressWarnings({ "unchecked" })
    public Iterable<BindingAttributeMappingsProvider<? extends View>> findCandidateProviders(View view) {
        Queue<BindingAttributeMappingsProvider<? extends View>> candidateProviders = Lists.newLinkedList();

        if (CustomViewUtils.isCustomWidget(view)) {
            candidateProviders.add(new CustomBindingAttributeMapperAdapter<View>((BindableView<View>) view,
                    propertyAttributeParser));
        }

        processViewHierarchy(view.getClass(), candidateProviders);
        return candidateProviders;
    }

    @SuppressWarnings("unchecked")
    private void processViewHierarchy(Class<? extends View> clazz,
            Queue<BindingAttributeMappingsProvider<? extends View>> candidateProviders) {
        BindingAttributeMappingsProvider<? extends View> provider = bindingAttributeMappingsProviderMap.find(clazz);

        if (provider != null)
            candidateProviders.add(provider);

        if (clazz != View.class)
            processViewHierarchy((Class<? extends View>) clazz.getSuperclass(), candidateProviders);
    }
}