/*
* Copyright (C) 2006 The Android Open Source Project
*
* 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.banking.xc.utils;
import java.util.ArrayList;
import java.util.WeakHashMap;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.content.Context;
import android.net.Uri;
import com.banking.xc.utils.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Checkable;
import android.widget.Filter;
import android.widget.Filterable;
import android.widget.ImageView;
import android.widget.SimpleAdapter;
import android.widget.TextView;
/**
* An easy adapter to map static data to views defined in an XML file. You can
* specify the data backing the list as an ArrayList of Maps. Each entry in the
* ArrayList corresponds to one row in the list. The Maps contain the data for
* each row. You also specify an XML file that defines the views used to display
* the row, and a mapping from keys in the Map to specific views.
*
* Binding data to views occurs in two phases. First, if a
* {@link android.widget.SimpleAdapter.ViewBinder} is available,
* {@link ViewBinder#setViewValue(android.view.View, Object, String)} is
* invoked. If the returned value is true, binding has occurred. If the returned
* value is false, the following views are then tried in order:
* <ul>
* <li>A view that implements Checkable (e.g. CheckBox). The expected bind value
* is a boolean.
* <li>TextView. The expected bind value is a string and
* {@link #setViewText(TextView, String)} is invoked.
* <li>ImageView. The expected bind value is a resource id or a string and
* {@link #setViewImage(ImageView, int)} or
* {@link #setViewImage(ImageView, String)} is invoked.
* </ul>
* If no appropriate binding can be found, an {@link IllegalStateException} is
* thrown.
*/
public class SimpleJsonAdapter extends BaseAdapter implements Filterable {
private int[] mTo;
private String[] mFrom;
private ViewBinder mViewBinder;
private JSONArray mData;
private int mResource;
private int mDropDownResource;
private LayoutInflater mInflater;
private final WeakHashMap<View, View[]> mHolders = new WeakHashMap<View, View[]>();
private ArrayList<View> viewList = new ArrayList<View>();
private SimpleFilter mFilter;
private JSONArray mUnfilteredData;
/**
* Constructor
*
* @param context
* The context where the View associated with this SimpleAdapter
* is running
* @param data
* A List of Maps. Each entry in the List corresponds to one row
* in the list. The Maps contain the data for each row, and
* should include all the entries specified in "from"
* @param resource
* Resource identifier of a view layout that defines the views
* for this list item. The layout file should include at least
* those named views defined in "to"
* @param from
* A list of column names that will be added to the Map
* associated with each item.
* @param to
* The views that should display column in the "from" parameter.
* These should all be TextViews. The first N views in this list
* are given the values of the first N columns in the from
* parameter.
*/
public SimpleJsonAdapter(Context context, JSONArray data, int resource,
String[] from, int[] to) {
mData = data;
mResource = mDropDownResource = resource;
mFrom = from;
mTo = to;
mInflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
/**
* @see android.widget.Adapter#getCount()
*/
public int getCount() {
return mData.length();
}
/**
* @see android.widget.Adapter#getItem(int)
*/
public Object getItem(int position) {
try {
return mData.get(position);
} catch (JSONException e) {
throw new RuntimeException(e);
}
}
/**
* @see android.widget.Adapter#getItemId(int)
*/
public long getItemId(int position) {
return position;
}
/**
* @see android.widget.Adapter#getView(int, View, ViewGroup)
*/
public View getView(int position, View convertView, ViewGroup parent) {
return createViewFromResource(position, convertView, parent, mResource);
}
private View createViewFromResource(int position, View convertView,
ViewGroup parent, int resource) {
View v;
if (convertView == null) {
v = ImageUtil.inflate(resource, parent, false);
final int[] to = mTo;
final int count = to.length;
final View[] holder = new View[count];
for (int i = 0; i < count; i++) {
holder[i] = v.findViewById(to[i]);
}
mHolders.put(v, holder);
viewList.add(v);
} else {
v = convertView;
}
bindView(position, v);
return v;
}
/**
* <p>
* Sets the layout resource to create the drop down views.
* </p>
*
* @param resource
* the layout resource defining the drop down views
* @see #getDropDownView(int, android.view.View, android.view.ViewGroup)
*/
public void setDropDownViewResource(int resource) {
this.mDropDownResource = resource;
}
@Override
public View getDropDownView(int position, View convertView, ViewGroup parent) {
return createViewFromResource(position, convertView, parent,
mDropDownResource);
}
public View getView(int position) {
if (Log.D) {
Log.d("size", "" + viewList.size());
}
return null;// viewList.get(position);
}
private void bindView(int position, View view) {
JSONObject dataSet = null;
try {
dataSet = mData.getJSONObject(position);
} catch (JSONException e) {
throw new RuntimeException(e);
}
if (dataSet == null) {
return;
}
final ViewBinder binder = mViewBinder;
final View[] holder = mHolders.get(view);
final String[] from = mFrom;
final int[] to = mTo;
final int count = to.length;
for (int i = 0; i < count; i++) {
final View v = holder[i];
if (v != null) {
Object data = null;
try {
data = dataSet.get(from[i]);
} catch (JSONException e) {
throw new RuntimeException(e);
}
String text = data == null ? "" : data.toString();
if (text == null) {
text = "";
}
boolean bound = false;
if (binder != null) {
bound = binder.setViewValue(v, data, text);
}
if (!bound) {
if (v instanceof Checkable) {
if (data instanceof Boolean) {
((Checkable) v).setChecked((Boolean) data);
} else {
throw new IllegalStateException(v.getClass()
.getName()
+ " should be bound to a Boolean, not a "
+ data.getClass());
}
} else if (v instanceof TextView) {
// Note: keep the instanceof TextView check at the
// bottom of these
// ifs since a lot of views are TextViews (e.g.
// CheckBoxes).
setViewText((TextView) v, text);
} else if (v instanceof ImageView) {
if (data instanceof Integer) {
setViewImage((ImageView) v, (Integer) data);
} else {
setViewImage((ImageView) v, text);
}
} else {
throw new IllegalStateException(
v.getClass().getName()
+ " is not a "
+ " view that can be bounds by this SimpleAdapter");
}
}
}
}
}
/**
* Returns the {@link ViewBinder} used to bind data to views.
*
* @return a ViewBinder or null if the binder does not exist
*
* @see #setViewBinder(android.widget.SimpleAdapter.ViewBinder)
*/
public ViewBinder getViewBinder() {
return mViewBinder;
}
/**
* Sets the binder used to bind data to views.
*
* @param viewBinder
* the binder used to bind data to views, can be null to remove
* the existing binder
*
* @see #getViewBinder()
*/
public void setViewBinder(ViewBinder viewBinder) {
mViewBinder = viewBinder;
}
/**
* Called by bindView() to set the image for an ImageView but only if there
* is no existing ViewBinder or if the existing ViewBinder cannot handle
* binding to an ImageView.
*
* This method is called instead of {@link #setViewImage(ImageView, String)}
* if the supplied data is an int or Integer.
*
* @param v
* ImageView to receive an image
* @param value
* the value retrieved from the data set
*
* @see #setViewImage(ImageView, String)
*/
public void setViewImage(ImageView v, int value) {
v.setImageResource(value);
}
/**
* Called by bindView() to set the image for an ImageView but only if there
* is no existing ViewBinder or if the existing ViewBinder cannot handle
* binding to an ImageView.
*
* By default, the value will be treated as an image resource. If the value
* cannot be used as an image resource, the value is used as an image Uri.
*
* This method is called instead of {@link #setViewImage(ImageView, int)} if
* the supplied data is not an int or Integer.
*
* @param v
* ImageView to receive an image
* @param value
* the value retrieved from the data set
*
* @see #setViewImage(ImageView, int)
*/
public void setViewImage(ImageView v, String value) {
try {
v.setImageResource(Integer.parseInt(value));
} catch (NumberFormatException nfe) {
v.setImageURI(Uri.parse(value));
}
}
/**
* Called by bindView() to set the text for a TextView but only if there is
* no existing ViewBinder or if the existing ViewBinder cannot handle
* binding to an TextView.
*
* @param v
* TextView to receive text
* @param text
* the text to be set for the TextView
*/
public void setViewText(TextView v, String text) {
v.setText(text);
}
public Filter getFilter() {
if (mFilter == null) {
mFilter = new SimpleFilter();
}
return mFilter;
}
/**
* This class can be used by external clients of SimpleAdapter to bind
* values to views.
*
* You should use this class to bind values to views that are not directly
* supported by SimpleAdapter or to change the way binding occurs for views
* supported by SimpleAdapter.
*
* @see SimpleAdapter#setViewImage(ImageView, int)
* @see SimpleAdapter#setViewImage(ImageView, String)
* @see SimpleAdapter#setViewText(TextView, String)
*/
public static interface ViewBinder {
/**
* Binds the specified data to the specified view.
*
* When binding is handled by this ViewBinder, this method must return
* true. If this method returns false, SimpleAdapter will attempts to
* handle the binding on its own.
*
* @param view
* the view to bind the data to
* @param data
* the data to bind to the view
* @param textRepresentation
* a safe String representation of the supplied data: it is
* either the result of data.toString() or an empty String
* but it is never null
*
* @return true if the data was bound to the view, false otherwise
*/
boolean setViewValue(View view, Object data, String textRepresentation);
}
/**
* <p>
* An array filters constrains the content of the array adapter with a
* prefix. Each item that does not start with the supplied prefix is removed
* from the list.
* </p>
*/
private class SimpleFilter extends Filter {
@Override
protected FilterResults performFiltering(CharSequence prefix) {
FilterResults results = new FilterResults();
if (mUnfilteredData == null) {
mUnfilteredData = mData;// XXX new ArrayList<Map<String,
// ?>>(mData);
}
if (prefix == null || prefix.length() == 0) {
JSONArray list = mUnfilteredData;
results.values = list;
results.count = list.length();
} else {
String prefixString = prefix.toString().toLowerCase();
JSONArray unfilteredValues = mUnfilteredData;
int count = unfilteredValues.length();
JSONArray newValues = new JSONArray();// new
// ArrayList<Map<String,
// ?>>(count);
for (int i = 0; i < count; i++) {
JSONObject h = null;
try {
h = unfilteredValues.getJSONObject(i);
} catch (JSONException e) {
throw new RuntimeException(e);
}
if (h != null) {
int len = mTo.length;
for (int j = 0; j < len; j++) {
String str = null;
try {
str = (String) h.getString(mFrom[j]);
} catch (JSONException e) {
throw new RuntimeException(e);
}
String[] words = str.split(" ");
int wordCount = words.length;
for (int k = 0; k < wordCount; k++) {
String word = words[k];
if (word.toLowerCase().startsWith(prefixString)) {
newValues.put(h);
break;
}
}
}
}
}
results.values = newValues;
results.count = newValues.length();
}
return results;
}
@Override
protected void publishResults(CharSequence constraint,
FilterResults results) {
// noinspection unchecked
mData = (JSONArray) results.values;
if (results.count > 0) {
notifyDataSetChanged();
} else {
notifyDataSetInvalidated();
}
}
}
}