| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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.apache.felix.cm.json.impl; |
| |
| import java.io.FilterWriter; |
| import java.io.IOException; |
| import java.io.Writer; |
| import java.util.Collections; |
| import java.util.Dictionary; |
| import java.util.Enumeration; |
| import java.util.Hashtable; |
| import java.util.Map; |
| |
| import javax.json.Json; |
| import javax.json.JsonException; |
| import javax.json.JsonValue; |
| import javax.json.stream.JsonGenerator; |
| |
| import org.apache.felix.cm.json.ConfigurationResource; |
| import org.apache.felix.cm.json.ConfigurationWriter; |
| |
| public class ConfigurationWriterImpl |
| implements ConfigurationWriter, ConfigurationWriter.Builder { |
| |
| private boolean closed = false; |
| |
| private JsonGenerator generator; |
| |
| private boolean closeGenerator; |
| |
| private void checkClosed() throws IOException { |
| if (this.closed) { |
| throw new IOException("Writer already closed"); |
| } |
| closed = true; |
| } |
| |
| @Override |
| public ConfigurationWriter build(final Writer writer) { |
| this.generator = Json.createGeneratorFactory(Collections.singletonMap(JsonGenerator.PRETTY_PRINTING, true)) |
| .createGenerator(new FilterWriter(writer) { |
| |
| @Override |
| public void close() throws IOException { |
| // do not close provided writer, just flush |
| super.flush(); |
| } |
| |
| }); |
| this.closeGenerator = true; |
| return this; |
| } |
| |
| @Override |
| public ConfigurationWriter build(final JsonGenerator generator) { |
| this.generator = generator; |
| this.closeGenerator = false; |
| return this; |
| } |
| |
| @Override |
| public void writeConfiguration(final Dictionary<String, Object> properties) throws IOException { |
| checkClosed(); |
| try { |
| writeConfigurationInternal(properties); |
| if ( this.closeGenerator) this.generator.close(); |
| } catch ( final JsonException je) { |
| throw new IOException(je.getMessage(), je); |
| } |
| } |
| |
| private void writeConfigurationInternal(final Dictionary<String, Object> properties) throws IOException { |
| generator.writeStartObject(); |
| final Enumeration<String> e = properties.keys(); |
| while (e.hasMoreElements()) { |
| final String name = e.nextElement(); |
| final Object value = properties.get(name); |
| |
| final Map.Entry<String, JsonValue> entry = TypeConverter.convertObjectToTypedJsonValue(value); |
| final String key; |
| if (TypeConverter.NO_TYPE_INFO.equals(entry.getKey())) { |
| key = name; |
| } else { |
| key = name.concat(":").concat(entry.getKey()); |
| } |
| generator.write(key, entry.getValue()); |
| } |
| generator.writeEnd(); |
| } |
| |
| @Override |
| public void writeConfigurationResource(final ConfigurationResource resource) throws IOException { |
| checkClosed(); |
| try { |
| generator.writeStartObject(); |
| for (final Map.Entry<String, Object> entry : resource.getProperties().entrySet()) { |
| generator.write(entry.getKey(), JsonSupport.convertToJson(entry.getValue())); |
| } |
| for (final Map.Entry<String, Hashtable<String, Object>> entry : resource.getConfigurations().entrySet()) { |
| generator.writeKey(entry.getKey()); |
| writeConfigurationInternal(entry.getValue()); |
| } |
| generator.writeEnd(); |
| if ( this.closeGenerator) this.generator.close(); |
| } catch ( final JsonException je) { |
| throw new IOException(je.getMessage(), je); |
| } |
| } |
| } |