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/*
* Copyright © 2016-2018 European Support Limited
*
* 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.onap.config;
import java.io.File;
import java.net.MalformedURLException;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.URL;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashSet;
import java.util.List;
import java.util.Objects;
import java.util.Set;
import java.util.function.Function;
public class NonConfigResource {
static final String NODE_CONFIG_LOCATION = "node.config.location";
static final String CONFIG_LOCATION = "config.location";
private final List<Function<String, Path>> lookupFunctions =
Arrays.asList(this::getFromFile, this::findInFiles, this::getForNode, this::getGlobal, this::findInUris);
private final Set<URI> uris = Collections.synchronizedSet(new HashSet<>());
private final Set<File> files = Collections.synchronizedSet(new HashSet<>());
private final Function<String, String> propertyGetter;
NonConfigResource(Function<String, String> propertyGetter) {
this.propertyGetter = propertyGetter;
}
public NonConfigResource() {
this(System::getProperty);
}
public void add(URL url) {
uris.add(toUri(url));
}
public void add(File file) {
files.add(file);
}
public Path locate(String resource) {
if (resource == null) {
return null;
}
try {
return lookupFunctions.stream()
.map(f -> f.apply(resource))
.filter(Objects::nonNull)
.findFirst().orElse(null);
} catch (Exception exception) {
exception.printStackTrace();
return null;
}
}
private Path locate(File root, String resource) {
if (!root.exists()) {
return null;
}
return ConfigurationUtils.getAllFiles(root, true, false)
.stream()
.filter(f -> !ConfigurationUtils.isConfig(f))
.peek(this::add).filter(f -> f.getAbsolutePath().endsWith(resource))
.findFirst()
.map(file -> Paths.get(file.getAbsolutePath())).orElse(null);
}
private Path getFromFile(String resource) {
return new File(resource).exists() ? Paths.get(resource) : null;
}
private Path findInUris(String resource) {
for (URI uri : uris) {
if (toUrl(uri).getFile().endsWith(resource)) {
return Paths.get(uri);
}
}
return null;
}
private Path findInFiles(String resource) {
for (File availableFile : files) {
String absolutePath = availableFile.getAbsolutePath();
if (absolutePath.endsWith(resource) && availableFile.exists()) {
return Paths.get(absolutePath);
}
}
return null;
}
private Path getForNode(String resource) {
return getFromProperty(NODE_CONFIG_LOCATION, resource);
}
private Path getGlobal(String resource) {
return getFromProperty(CONFIG_LOCATION, resource);
}
private Path getFromProperty(String property, String resource) {
String value = propertyGetter.apply(property);
return (value == null) ? null : locate(new File(value), resource);
}
private static URI toUri(URL url) {
try {
return url.toURI();
} catch (URISyntaxException e) {
throw new IllegalStateException("Unexpected URL syntax: " + url, e);
}
}
private static URL toUrl(URI uri) {
try {
return uri.toURL();
} catch (MalformedURLException e) {
throw new IllegalStateException("Unexpected URI syntax: " + uri, e);
}
}
}
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