| /* |
| * 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.tamaya.core.properties; |
| |
| import java.io.Serializable; |
| import java.util.*; |
| |
| import org.apache.tamaya.ConfigChangeSet; |
| import org.apache.tamaya.PropertySource; |
| import org.apache.tamaya.spi.ConfigChangeSetCallback; |
| |
| /** |
| * Abstract base class for implementing a {@link org.apache.tamaya.PropertySource}. |
| */ |
| public abstract class AbstractPropertySource implements PropertySource, Serializable{ |
| /** |
| * serialVersionUID. |
| */ |
| private static final long serialVersionUID = -6553955893879292837L; |
| |
| protected String name; |
| |
| /** |
| * The underlying sources. |
| */ |
| private volatile Set<String> sources = new HashSet<>(); |
| |
| private volatile Set<ConfigChangeSetCallback> callbacks = new LinkedHashSet<>(); |
| |
| /** |
| * Constructor. |
| */ |
| protected AbstractPropertySource(String name){ |
| this.name = Objects.requireNonNull(name); |
| } |
| |
| @Override |
| public String getName(){ |
| return name; |
| } |
| |
| |
| /** |
| * Method that allows an additional source to be added, to be used by |
| * subclasses. |
| * |
| * @param source the source, not {@code null}. |
| */ |
| protected void addSource(String source){ |
| Objects.requireNonNull(source); |
| this.sources.add(source); |
| } |
| |
| |
| protected void addSources(Collection<String> sources){ |
| Objects.requireNonNull(sources); |
| this.sources.addAll(sources); |
| } |
| |
| @Override |
| public Optional<String> get(String key){ |
| return Optional.ofNullable(getProperties().get(key)); |
| } |
| |
| @Override |
| public String toString(){ |
| StringBuilder b = new StringBuilder(getClass().getSimpleName()).append("{\n"); |
| b.append(" ").append("(").append(getName()).append(" = ").append(getName()).append(")\n"); |
| printContents(b); |
| return b.append('}').toString(); |
| } |
| |
| @Override |
| public void update(ConfigChangeSet changeSet) { |
| //TODO how do we want to update this guy? |
| this.callbacks.parallelStream().forEach((c) -> c.onChange(changeSet)); |
| } |
| |
| @Override |
| public void registerForUpdate(ConfigChangeSetCallback callback) { |
| this.callbacks.add(callback); |
| } |
| |
| @Override |
| public void removeForUpdate(ConfigChangeSetCallback callback) { |
| this.callbacks.remove(callback); |
| } |
| |
| protected String printContents(StringBuilder b){ |
| Map<String,String> sortMap = getProperties(); |
| if(!(sortMap instanceof SortedMap)){ |
| sortMap = new TreeMap<>(sortMap); |
| } |
| for(Map.Entry<String,String> en : sortMap.entrySet()){ |
| b.append(" ").append(en.getKey()).append(" = \"").append(en.getValue().replaceAll("\\\"", "\\\\\"").replaceAll("=", "\\=")).append("\"\n"); |
| } |
| return b.toString(); |
| } |
| |
| } |