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/*
* Copyright 2015 Open Networking Laboratory
*
* 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
*
* 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.onosproject.cfg.impl;
import com.google.common.collect.ImmutableSet;
import org.onosproject.cfg.ConfigProperty;
import org.onosproject.cfg.ConfigProperty.Type;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.util.Set;
import static org.onosproject.cfg.ConfigProperty.defineProperty;
/**
* Utility for writing and reading configuration property definition file.
*/
public final class ConfigPropertyDefinitions {
private static final String FMT = "%s|%s|%s|%s\n";
private static final String SEP = "\\|";
private static final String COMMENT = "#";
private ConfigPropertyDefinitions() {
}
/**
* Writes the specified set of property definitions into the given output
* stream.
*
* @param stream output stream
* @param props properties whose definitions are to be written
* @throws java.io.IOException if unable to write the stream
*/
public static void write(OutputStream stream, Set<ConfigProperty> props) throws IOException {
try (PrintWriter pw = new PrintWriter(new OutputStreamWriter(stream))) {
props.forEach(p -> pw.format(FMT, p.name(), p.type(), p.description(), p.defaultValue()));
}
}
/**
* Reads the specified input stream and creates from its contents a
* set of property definitions.
*
* @param stream input stream
* @return properties whose definitions are contained in the stream
* @throws java.io.IOException if unable to read the stream
*/
public static Set<ConfigProperty> read(InputStream stream) throws IOException {
ImmutableSet.Builder<ConfigProperty> builder = ImmutableSet.builder();
try (BufferedReader br = new BufferedReader(new InputStreamReader(stream))) {
String line;
while ((line = br.readLine()) != null) {
if (!line.isEmpty() && !line.startsWith(COMMENT)) {
String[] f = line.split(SEP, 4);
builder.add(defineProperty(f[0], Type.valueOf(f[1]), f[2], f[3]));
}
}
}
return builder.build();
}
}
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