1 /* 2 * Copyright (C) 2011 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.ide.common.rendering.api; 18 19 import com.android.resources.ResourceType; 20 21 import java.util.ArrayList; 22 import java.util.Collections; 23 import java.util.Iterator; 24 import java.util.List; 25 26 /** 27 * A data binding item. It contain a {@link ResourceReference} to the view used to represent it. 28 * It also contains how many items of this type the AdapterView should display. 29 * 30 * It can also contain an optional list of children in case the AdapterView is an 31 * ExpandableListView. In this case, the count value is used as a repeat count for the children, 32 * similar to {@link AdapterBinding#getRepeatCount()}. 33 * 34 */ 35 public class DataBindingItem implements Iterable<DataBindingItem> { 36 private final ResourceReference mReference; 37 private final int mCount; 38 private List<DataBindingItem> mChildren; 39 DataBindingItem(ResourceReference reference, int count)40 public DataBindingItem(ResourceReference reference, int count) { 41 mReference = reference; 42 mCount = count; 43 } 44 DataBindingItem(String name, boolean platformLayout, int count)45 public DataBindingItem(String name, boolean platformLayout, int count) { 46 this(new ResourceReference(name, platformLayout), count); 47 } 48 DataBindingItem(String name, boolean platformLayout)49 public DataBindingItem(String name, boolean platformLayout) { 50 this(name, platformLayout, 1); 51 } 52 DataBindingItem(String name, int count)53 public DataBindingItem(String name, int count) { 54 this(name, false /*platformLayout*/, count); 55 } 56 DataBindingItem(String name)57 public DataBindingItem(String name) { 58 this(name, false /*platformLayout*/, 1); 59 } 60 61 /** 62 * Returns the {@link ResourceReference} for the view. The {@link ResourceType} for the 63 * referenced resource is implied to be {@link ResourceType#LAYOUT}. 64 */ getViewReference()65 public ResourceReference getViewReference() { 66 return mReference; 67 } 68 69 /** 70 * The repeat count for this object or the repeat count for the children if there are any. 71 */ getCount()72 public int getCount() { 73 return mCount; 74 } 75 addChild(DataBindingItem child)76 public void addChild(DataBindingItem child) { 77 if (mChildren == null) { 78 mChildren = new ArrayList<DataBindingItem>(); 79 } 80 81 mChildren.add(child); 82 } 83 getChildren()84 public List<DataBindingItem> getChildren() { 85 if (mChildren != null) { 86 return mChildren; 87 } 88 89 return Collections.emptyList(); 90 } 91 92 @Override iterator()93 public Iterator<DataBindingItem> iterator() { 94 List<DataBindingItem> list = getChildren(); 95 return list.iterator(); 96 } 97 } 98