com.github.netty.protocol.mqtt.subscriptions.DumpTreeVisitor Maven / Gradle / Ivy
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/*
* Copyright (c) 2012-2018 The original author or authors
* ------------------------------------------------------
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* and Apache License v2.0 which accompanies this distribution.
*
* The Eclipse Public License is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* The Apache License v2.0 is available at
* http://www.opensource.org/licenses/apache2.0.php
*
* You may elect to redistribute this code under either of these licenses.
*/
package com.github.netty.protocol.mqtt.subscriptions;
class DumpTreeVisitor implements CTrie.IVisitor {
String s = "";
@Override
public void visit(CNode node, int deep) {
String indentTabs = indentTabs(deep);
s += indentTabs + (node.token == null ? "''" : node.token.toString()) + prettySubscriptions(node) + "\n";
}
private String prettySubscriptions(CNode node) {
if (node instanceof TNode) {
return "TNode";
}
if (node.subscriptions.isEmpty()) {
return "";
}
StringBuilder subScriptionsStr = new StringBuilder(" ~~[");
int counter = 0;
for (Subscription couple : node.subscriptions) {
subScriptionsStr
.append("{filter=").append(couple.topicFilter).append(", ")
.append("qos=").append(couple.getRequestedQos()).append(", ")
.append("client='").append(couple.clientId).append("'}");
counter++;
if (counter < node.subscriptions.size()) {
subScriptionsStr.append(";");
}
}
return subScriptionsStr.append("]").toString();
}
private String indentTabs(int deep) {
StringBuilder s = new StringBuilder();
if (deep > 0) {
s.append(" ");
for (int i = 0; i < deep - 1; i++) {
s.append("| ");
}
s.append("|-");
}
return s.toString();
}
@Override
public String getResult() {
return s;
}
}