Mercurial > hg > thermostat-ng
view common/src/main/java/com/redhat/thermostat/common/yaml/JsonToYaml.java @ 25:dd0992bd51aa
Add Maven Central upload, refactor lang-schema and json libs to thermostat-common library
- merge common-json and common-lang-schema packages into thermostat- common.
- add targets to generate Javadoc and source jars, and modify sources
to remove some Javadoc warnings.
- add targets to sign and deploy thermostat-common to Maven Central.
Reviewed-by: sgehwolf, neugens
Review-thread: http://icedtea.classpath.org/pipermail/thermostat/2017-September/025214.html
author | Simon Tooke <stooke@redhat.com> |
---|---|
date | Fri, 29 Sep 2017 14:48:00 -0400 |
parents | common/json/src/main/java/com/redhat/thermostat/common/yaml/JsonToYaml.java@ab2706b9b1e3 |
children | 33cf0b946e3d |
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/* * Copyright 2012-2017 Red Hat, Inc. * * This file is part of Thermostat. * * Thermostat is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published * by the Free Software Foundation; either version 2, or (at your * option) any later version. * * Thermostat is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with Thermostat; see the file COPYING. If not see * <http://www.gnu.org/licenses/>. * * Linking this code with other modules is making a combined work * based on this code. Thus, the terms and conditions of the GNU * General Public License cover the whole combination. * * As a special exception, the copyright holders of this code give * you permission to link this code with independent modules to * produce an executable, regardless of the license terms of these * independent modules, and to copy and distribute the resulting * executable under terms of your choice, provided that you also * meet, for each linked independent module, the terms and conditions * of the license of that module. An independent module is a module * which is not derived from or based on this code. If you modify * this code, you may extend this exception to your version of the * library, but you are not obligated to do so. If you do not wish * to do so, delete this exception statement from your version. */ package com.redhat.thermostat.common.yaml; import com.google.gson.JsonArray; import com.google.gson.JsonElement; import com.google.gson.JsonObject; import com.google.gson.JsonPrimitive; import java.io.IOException; import java.io.StringWriter; import java.io.Writer; import java.util.Map; /** * convert JSON object to YAML string */ public class JsonToYaml { private Writer out; private int indent = 2; public void setIndentation(int i) { this.indent = i; } String jsonToYamlString(JsonObject root) throws IOException { this.out = new StringWriter(); jsonToYaml(root, out); return out.toString(); } public void jsonToYaml(JsonObject root, Writer out) throws IOException { this.out = out; jsonToYaml(root, 0); } private void dispatch(JsonElement el, int currentIndent) throws IOException { if (el.isJsonPrimitive()) { final JsonPrimitive pr = el.getAsJsonPrimitive(); if (pr.isBoolean() || pr.isNumber()) { out.append(el.getAsString()).append('\n'); } else { out.append("'").append(el.getAsString()).append("'\n"); } } else if (el.isJsonArray()) { out.append('\n'); jsonToYaml(el.getAsJsonArray(), currentIndent); } else if (el.isJsonObject()) { out.append('\n'); jsonToYaml(el.getAsJsonObject(), currentIndent); } else { throw new UnsupportedOperationException("Unsupported element: " + el); } } private void jsonToYaml(JsonObject obj, int currentIndent) throws IOException { final int newindent = currentIndent + indent; for (final Map.Entry<String, JsonElement> entry : obj.entrySet()) { doIndent(currentIndent); out.append(entry.getKey()).append(": "); dispatch(entry.getValue(), newindent); } } private void jsonToYaml(JsonArray array, int currentIndent) throws IOException { for (final JsonElement el : array) { doIndent(currentIndent); out.append("- "); if (el.isJsonArray()) { jsonToYaml(el.getAsJsonArray(), 0); } else if (el.isJsonObject()) { jsonToYaml(el.getAsJsonObject(), 0); } else { dispatch(el, 0); } } } private void doIndent(int currentIndent) throws IOException { for (int i = 0; i < currentIndent; i++) out.append(' '); } }