/* * Copyright 2019 Mohammad Taqi Soleimani * * 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 */ package io.cassandana.broker.subscriptions; import io.netty.util.internal.StringUtil; class DumpTreeVisitor implements CTrie.IVisitor<String> { 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 StringUtil.EMPTY_STRING; } 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; } }