src/com/android/apps/tag/message/ParsedNdefMessage.java

/*
 * Copyright (C) 2010 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.android.apps.tag.message;

import com.android.apps.tag.R;
import com.android.apps.tag.record.ParsedNdefRecord;
import com.android.apps.tag.record.SmartPoster;
import com.android.apps.tag.record.UriRecord;
import com.google.common.collect.ImmutableList;

import android.content.Context;

import java.util.List;
import java.util.Locale;

/**
 * A parsed version of an {@link android.nfc.NdefMessage}
 */
public class ParsedNdefMessage {

    private List<ParsedNdefRecord> mRecords;

    public ParsedNdefMessage(List<ParsedNdefRecord> records) {
        mRecords = ImmutableList.copyOf(records);
    }

    /**
     * Returns the list of parsed records on this message.
     */
    public List<ParsedNdefRecord> getRecords() {
        return mRecords;
    }

    /**
     * Returns the snippet information associated with the NdefMessage
     * most appropriate for the given {@code locale}.
     */
    public String getSnippet(Context context, Locale locale) {
        if (mRecords.isEmpty()) {
            return context.getString(R.string.tag_empty);
        }

        ParsedNdefRecord record = mRecords.get(0);

        if (record instanceof UriRecord) {
            // Be a good citizen of the Smart Poster spec.

            int smartPosterRecord = -1;

            final int size = mRecords.size();
            for (int i = 1 ; i < size ; i++) {

                ParsedNdefRecord r = mRecords.get(i);

                if (r instanceof SmartPoster) {
                    smartPosterRecord = i;
                    break;
                }
            }

            if (smartPosterRecord != -1) {
                record = mRecords.get(smartPosterRecord);
            }
        }

        return record.getSnippet(context, locale);
    }
}