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/*
* Copyright 2014-2015 Open Networking Laboratory
*
* 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 org.onosproject.codec.impl;
import org.onosproject.codec.CodecContext;
import org.onosproject.codec.JsonCodec;
import org.onosproject.core.CoreService;
import org.onosproject.net.NetworkResource;
import org.onosproject.net.intent.HostToHostIntent;
import org.onosproject.net.intent.Intent;
import org.onosproject.net.intent.IntentService;
import org.onosproject.net.intent.IntentState;
import org.onosproject.net.intent.PointToPointIntent;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.node.ArrayNode;
import com.fasterxml.jackson.databind.node.ObjectNode;
import com.google.common.net.UrlEscapers;
import static com.google.common.base.Preconditions.checkNotNull;
import static org.onlab.util.Tools.nullIsIllegal;
/**
* Intent JSON codec.
*/
public final class IntentCodec extends JsonCodec<Intent> {
protected static final String TYPE = "type";
protected static final String ID = "id";
protected static final String APP_ID = "appId";
protected static final String STATE = "state";
protected static final String PRIORITY = "priority";
protected static final String RESOURCES = "resources";
protected static final String MISSING_MEMBER_MESSAGE =
" member is required in Intent";
@Override
public ObjectNode encode(Intent intent, CodecContext context) {
checkNotNull(intent, "Intent cannot be null");
final ObjectNode result = context.mapper().createObjectNode()
.put(TYPE, intent.getClass().getSimpleName())
.put(ID, intent.id().toString())
.put(APP_ID, UrlEscapers.urlPathSegmentEscaper()
.escape(intent.appId().name()));
final ArrayNode jsonResources = result.putArray(RESOURCES);
for (final NetworkResource resource : intent.resources()) {
jsonResources.add(resource.toString());
}
IntentService service = context.getService(IntentService.class);
IntentState state = service.getIntentState(intent.key());
if (state != null) {
result.put(STATE, state.toString());
}
return result;
}
@Override
public Intent decode(ObjectNode json, CodecContext context) {
checkNotNull(json, "JSON cannot be null");
String type = nullIsIllegal(json.get(TYPE),
TYPE + MISSING_MEMBER_MESSAGE).asText();
if (type.equals(PointToPointIntent.class.getSimpleName())) {
return context.codec(PointToPointIntent.class).decode(json, context);
} else if (type.equals(HostToHostIntent.class.getSimpleName())) {
return context.codec(HostToHostIntent.class).decode(json, context);
}
throw new IllegalArgumentException("Intent type "
+ type + " is not supported");
}
/**
* Extracts base intent specific attributes from a JSON object
* and adds them to a builder.
*
* @param json root JSON object
* @param context code context
* @param builder builder to use for storing the attributes
*/
public static void intentAttributes(ObjectNode json, CodecContext context,
Intent.Builder builder) {
String appId = nullIsIllegal(json.get(IntentCodec.APP_ID),
IntentCodec.APP_ID + IntentCodec.MISSING_MEMBER_MESSAGE).asText();
CoreService service = context.getService(CoreService.class);
builder.appId(service.getAppId(appId));
JsonNode priorityJson = json.get(IntentCodec.PRIORITY);
if (priorityJson != null) {
builder.priority(priorityJson.asInt());
}
}
}
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