com.android.ddmlib.jdwp.JdwpAgent Maven / Gradle / Ivy
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Library providing APIs to talk to Android devices
/*
* Copyright (C) 2015 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.ddmlib.jdwp;
import com.android.annotations.NonNull;
import com.android.annotations.Nullable;
import com.android.ddmlib.JdwpPacket;
import java.io.IOException;
import java.util.LinkedList;
import java.util.List;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
public abstract class JdwpAgent {
/**
* Interceptors waiting for a specific reply id.
*/
@NonNull
private final ConcurrentMap mReplyInterceptors;
@NonNull
private final List mInterceptors;
@NonNull
private final JdwpProtocol mProtocol;
public JdwpAgent(@NonNull JdwpProtocol protocol) {
mReplyInterceptors = new ConcurrentHashMap();
mInterceptors = new LinkedList();
mProtocol = protocol;
}
/**
* Adds an interceptor for a specific reply id. Once this interceptor
* handles the response, it will be removed.
*/
protected void addReplyInterceptor(int id, @NonNull JdwpInterceptor interceptor) {
mReplyInterceptors.put(id, interceptor);
}
/**
* Removes, if present, the interceptor to handle a reply with the given id.
*/
protected void removeReplyInterceptor(int id) {
mReplyInterceptors.remove(id);
}
public void clear() {
mReplyInterceptors.clear();
}
public void addJdwpInterceptor(@NonNull JdwpInterceptor interceptor) {
mInterceptors.add(interceptor);
}
public void incoming(@NonNull JdwpPacket packet, @Nullable JdwpAgent target) throws IOException {
mProtocol.incoming(packet, target);
int id = packet.getId();
if (packet.isReply()) {
JdwpInterceptor interceptor = mReplyInterceptors.remove(id);
if (interceptor != null) {
packet = interceptor.intercept(this, packet);
}
}
for (JdwpInterceptor interceptor : mInterceptors) {
if (packet == null) break;
packet = interceptor.intercept(this, packet);
}
if (target != null && packet != null) {
target.send(packet);
}
}
public void send(@NonNull JdwpPacket packet, @NonNull JdwpInterceptor interceptor) throws IOException {
mReplyInterceptors.put(packet.getId(), interceptor);
send(packet);
}
protected abstract void send(@NonNull JdwpPacket packet) throws IOException;
@NonNull
public JdwpProtocol getJdwpProtocol() {
return mProtocol;
}
}