109 lines
3.8 KiB
Java
109 lines
3.8 KiB
Java
/*
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* Copyright (C) 2010 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.camera;
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import org.xmlpull.v1.XmlPullParser;
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import org.xmlpull.v1.XmlPullParserException;
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import java.io.IOException;
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import java.lang.reflect.Constructor;
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import java.util.ArrayList;
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import java.util.HashMap;
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import android.content.Context;
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import android.util.AttributeSet;
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import android.util.Xml;
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import android.view.InflateException;
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/**
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* Inflate <code>CameraPreference</code> from XML resource.
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*/
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public class PreferenceInflater {
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private static final String PACKAGE_NAME =
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PreferenceInflater.class.getPackage().getName();
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private static final Class<?>[] CTOR_SIGNATURE =
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new Class[] {Context.class, AttributeSet.class};
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private static final HashMap<String, Constructor<?>> sConstructorMap =
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new HashMap<String, Constructor<?>>();
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private Context mContext;
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public PreferenceInflater(Context context) {
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mContext = context;
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}
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public CameraPreference inflate(int resId) {
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return inflate(mContext.getResources().getXml(resId));
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}
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private CameraPreference newPreference(String tagName, Object[] args) {
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String name = PACKAGE_NAME + "." + tagName;
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Constructor<?> constructor = sConstructorMap.get(name);
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try {
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if (constructor == null) {
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// Class not found in the cache, see if it's real, and try to
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// add it
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Class<?> clazz = mContext.getClassLoader().loadClass(name);
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constructor = clazz.getConstructor(CTOR_SIGNATURE);
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sConstructorMap.put(name, constructor);
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}
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return (CameraPreference) constructor.newInstance(args);
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} catch (NoSuchMethodException e) {
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throw new InflateException("Error inflating class " + name, e);
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} catch (ClassNotFoundException e) {
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throw new InflateException("No such class: " + name, e);
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} catch (Exception e) {
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throw new InflateException("While create instance of" + name, e);
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}
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}
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private CameraPreference inflate(XmlPullParser parser) {
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AttributeSet attrs = Xml.asAttributeSet(parser);
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ArrayList<CameraPreference> list = new ArrayList<CameraPreference>();
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Object args[] = new Object[]{mContext, attrs};
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try {
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for (int type = parser.next();
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type != XmlPullParser.END_DOCUMENT; type = parser.next()) {
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if (type != XmlPullParser.START_TAG) continue;
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CameraPreference pref = newPreference(parser.getName(), args);
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int depth = parser.getDepth();
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if (depth > list.size()) {
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list.add(pref);
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} else {
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list.set(depth - 1, pref);
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}
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if (depth > 1) {
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((PreferenceGroup) list.get(depth - 2)).addChild(pref);
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}
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}
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if (list.size() == 0) {
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throw new InflateException("No root element found");
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}
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return list.get(0);
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} catch (XmlPullParserException e) {
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throw new InflateException(e);
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} catch (IOException e) {
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throw new InflateException(parser.getPositionDescription(), e);
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}
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}
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}
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