replicant-packages_apps_Email/src/com/android/email/mail/Sender.java

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/*
* Copyright (C) 2008 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.email.mail;
import com.android.email.Email;
import com.android.email.R;
import com.android.emailcommon.mail.MessagingException;
import org.xmlpull.v1.XmlPullParserException;
import android.content.Context;
import android.content.res.XmlResourceParser;
import android.util.Log;
import java.io.IOException;
import java.util.HashMap;
public abstract class Sender {
protected static final int SOCKET_CONNECT_TIMEOUT = 10000;
private static final HashMap<String, Sender> sSenders = new HashMap<String, Sender>();
/**
* Static named constructor. It should be overrode by extending class.
* Because this method will be called through reflection, it can not be protected.
*/
public static Sender newInstance(Context context, String uri)
throws MessagingException {
throw new MessagingException("Sender.newInstance: Unknown scheme in " + uri);
}
private static Sender instantiateSender(Context context, String className, String uri)
throws MessagingException {
Object o = null;
try {
Class<?> c = Class.forName(className);
// and invoke "newInstance" class method and instantiate sender object.
java.lang.reflect.Method m =
c.getMethod("newInstance", Context.class, String.class);
o = m.invoke(null, context, uri);
} catch (Exception e) {
Log.d(Email.LOG_TAG, String.format(
"exception %s invoking %s.newInstance.(Context, String) method for %s",
e.toString(), className, uri));
throw new MessagingException("can not instantiate Sender object for " + uri);
}
if (!(o instanceof Sender)) {
throw new MessagingException(
uri + ": " + className + " create incompatible object");
}
return (Sender) o;
}
/**
* Find Sender implementation consulting with sender.xml file.
*/
private static Sender findSender(Context context, int resourceId, String uri)
throws MessagingException {
Sender sender = null;
try {
XmlResourceParser xml = context.getResources().getXml(resourceId);
int xmlEventType;
// walk through senders.xml file.
while ((xmlEventType = xml.next()) != XmlResourceParser.END_DOCUMENT) {
if (xmlEventType == XmlResourceParser.START_TAG &&
"sender".equals(xml.getName())) {
String scheme = xml.getAttributeValue(null, "scheme");
if (uri.startsWith(scheme)) {
// found sender entry whose scheme is matched with uri.
// then load sender class.
String className = xml.getAttributeValue(null, "class");
sender = instantiateSender(context, className, uri);
}
}
}
} catch (XmlPullParserException e) {
// ignore
} catch (IOException e) {
// ignore
}
return sender;
}
public synchronized static Sender getInstance(Context context, String uri)
throws MessagingException {
Sender sender = sSenders.get(uri);
if (sender == null) {
context = context.getApplicationContext();
sender = findSender(context, R.xml.senders_product, uri);
if (sender == null) {
sender = findSender(context, R.xml.senders, uri);
}
if (sender != null) {
sSenders.put(uri, sender);
}
}
if (sender == null) {
throw new MessagingException("Unable to locate an applicable Transport for " + uri);
}
return sender;
}
/**
* Get class of SettingActivity for this Sender class.
* @return Activity class that has class method actionEditOutgoingSettings().
*/
public Class<? extends android.app.Activity> getSettingActivityClass() {
// default SettingActivity class
return com.android.email.activity.setup.AccountSetupOutgoing.class;
}
public abstract void open() throws MessagingException;
public String validateSenderLimit(long messageId) {
return null;
}
/**
* Check message has any limitation of Sender or not.
*
* @param messageId the message that will be checked.
* @throws LimitViolationException
*/
public void checkSenderLimitation(long messageId) throws LimitViolationException {
}
public static class LimitViolationException extends MessagingException {
public final int mMsgResourceId;
public final long mActual;
public final long mLimit;
private LimitViolationException(int msgResourceId, long actual, long limit) {
super(UNSPECIFIED_EXCEPTION);
mMsgResourceId = msgResourceId;
mActual = actual;
mLimit = limit;
}
public static void check(int msgResourceId, long actual, long limit)
throws LimitViolationException {
if (actual > limit) {
throw new LimitViolationException(msgResourceId, actual, limit);
}
}
}
public abstract void sendMessage(long messageId) throws MessagingException;
public abstract void close() throws MessagingException;
}