142 lines
5.2 KiB
Java
142 lines
5.2 KiB
Java
/*
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* Copyright (C) 2008-2009 Marc Blank
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* Licensed to 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.exchange.adapter;
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import java.io.IOException;
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import java.io.InputStream;
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import android.content.ContentResolver;
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import android.content.Context;
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import com.android.exchange.EasSyncService;
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import com.android.exchange.EmailContent.Account;
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import com.android.exchange.EmailContent.Mailbox;
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/**
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* Base class for the Email and PIM sync parsers
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* Handles the basic flow of syncKeys, looping to get more data, handling errors, etc.
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* Each subclass must implement a handful of methods that relate specifically to the data type
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*
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*/
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public abstract class EasContentParser extends EasParser {
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EasSyncService mService;
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Mailbox mMailbox;
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Account mAccount;
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Context mContext;
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ContentResolver mContentResolver;
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public EasContentParser(InputStream in, EasSyncService _service) throws IOException {
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super(in);
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mService = _service;
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mContext = mService.mContext;
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mContentResolver = mContext.getContentResolver();
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mMailbox = mService.mMailbox;
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mAccount = mService.mAccount;
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}
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/**
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* Read, parse, and act on incoming commands from the Exchange server
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* @throws IOException if the connection is broken
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*/
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public abstract void commandsParser() throws IOException;
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/**
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* Read, parse, and act on server responses
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* Email doesn't have any, so this isn't yet implemented anywhere. It will become abstract,
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* in the near future, however.
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* @throws IOException
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*/
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public void responsesParser() throws IOException {
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// Placeholder until needed; will become an abstract method
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}
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/**
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* Delete all records of this class in this account
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*/
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public abstract void wipe();
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/**
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* Loop through the top-level structure coming from the Exchange server
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* Sync keys and the more available flag are handled here, whereas specific data parsing
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* is handled by abstract methods implemented for each data class (e.g. Email, Contacts, etc.)
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*/
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public boolean parse() throws IOException {
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int status;
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boolean moreAvailable = false;
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// If we're not at the top of the xml tree, throw an exception
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if (nextTag(START_DOCUMENT) != EasTags.SYNC_SYNC) {
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throw new IOException();
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}
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// Loop here through the remaining xml
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while (nextTag(START_DOCUMENT) != END_DOCUMENT) {
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if (tag == EasTags.SYNC_COLLECTION || tag == EasTags.SYNC_COLLECTIONS) {
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// Ignore these tags, since we've only got one collection syncing in this loop
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} else if (tag == EasTags.SYNC_STATUS) {
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// Status = 1 is success; everything else is a failure
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status = getValueInt();
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if (status != 1) {
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mService.errorLog("Sync failed: " + status);
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// Status = 3 means invalid sync key
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if (status == 3) {
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// Must delete all of the data and start over with syncKey of "0"
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mMailbox.mSyncKey = "0";
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// Make this a push box through the first sync
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// TODO Make frequency conditional on user settings!
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mMailbox.mSyncFrequency = Account.CHECK_INTERVAL_PUSH;
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mService.errorLog("Bad sync key; RESET and delete contacts");
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wipe();
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// Indicate there's more so that we'll start syncing again
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moreAvailable = true;
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}
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}
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} else if (tag == EasTags.SYNC_COMMANDS) {
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commandsParser();
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} else if (tag == EasTags.SYNC_RESPONSES) {
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responsesParser();
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} else if (tag == EasTags.SYNC_MORE_AVAILABLE) {
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moreAvailable = true;
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} else if (tag == EasTags.SYNC_SYNC_KEY) {
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if (mMailbox.mSyncKey.equals("0"))
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moreAvailable = true;
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String newKey = getValue();
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mService.userLog("New sync key: " + newKey);
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mMailbox.mSyncKey = newKey;
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// If we were pushing (i.e. auto-start), now we'll become ping-triggered
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if (mMailbox.mSyncFrequency == Account.CHECK_INTERVAL_PUSH) {
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mMailbox.mSyncFrequency = Account.CHECK_INTERVAL_PING;
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}
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} else {
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skipTag();
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}
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}
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// Make sure we save away the new syncKey, syncFrequency, etc.
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mMailbox.saveOrUpdate(mContext);
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// Let the caller know that there's more to do
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return moreAvailable;
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}
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}
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