LayeredOptions.java
/*
* 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.maven.cling.invoker;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.function.Consumer;
import java.util.function.Function;
import org.apache.maven.api.cli.Options;
import org.apache.maven.api.cli.ParserRequest;
/**
* Options that are "layered" by precedence order.
*
* @param <O> The type of options.
*/
public abstract class LayeredOptions<O extends Options> implements Options {
protected final List<O> options;
protected LayeredOptions(List<O> options) {
this.options = new ArrayList<>(options);
}
@Override
public Optional<Map<String, String>> userProperties() {
return collectMapIfPresentOrEmpty(Options::userProperties);
}
@Override
public String source() {
return String.format(
"layered(%s)", options.stream().map(Options::source).toList());
}
@Override
public Optional<Boolean> showVersionAndExit() {
return returnFirstPresentOrEmpty(Options::showVersionAndExit);
}
@Override
public Optional<Boolean> showVersion() {
return returnFirstPresentOrEmpty(Options::showVersion);
}
@Override
public Optional<Boolean> quiet() {
return returnFirstPresentOrEmpty(Options::quiet);
}
@Override
public Optional<Boolean> verbose() {
return returnFirstPresentOrEmpty(Options::verbose);
}
@Override
public Optional<Boolean> showErrors() {
return returnFirstPresentOrEmpty(Options::showErrors);
}
@Override
public Optional<String> failOnSeverity() {
return returnFirstPresentOrEmpty(Options::failOnSeverity);
}
@Override
public Optional<Boolean> nonInteractive() {
return returnFirstPresentOrEmpty(Options::nonInteractive);
}
@Override
public Optional<Boolean> forceInteractive() {
return returnFirstPresentOrEmpty(Options::forceInteractive);
}
@Override
public Optional<String> altUserSettings() {
return returnFirstPresentOrEmpty(Options::altUserSettings);
}
@Override
public Optional<String> altProjectSettings() {
return returnFirstPresentOrEmpty(Options::altProjectSettings);
}
@Override
public Optional<String> altInstallationSettings() {
return returnFirstPresentOrEmpty(Options::altInstallationSettings);
}
@Override
public Optional<String> altUserToolchains() {
return returnFirstPresentOrEmpty(Options::altUserToolchains);
}
@Override
public Optional<String> altInstallationToolchains() {
return returnFirstPresentOrEmpty(Options::altInstallationToolchains);
}
@Override
public Optional<String> logFile() {
return returnFirstPresentOrEmpty(Options::logFile);
}
@Override
public Optional<Boolean> rawStreams() {
return returnFirstPresentOrEmpty(Options::rawStreams);
}
@Override
public Optional<String> color() {
return returnFirstPresentOrEmpty(Options::color);
}
@Override
public Optional<Boolean> offline() {
return returnFirstPresentOrEmpty(Options::offline);
}
@Override
public Optional<Boolean> help() {
return returnFirstPresentOrEmpty(Options::help);
}
@Override
public void warnAboutDeprecatedOptions(ParserRequest request, Consumer<String> printWriter) {}
@Override
public void displayHelp(ParserRequest request, Consumer<String> printWriter) {
options.get(0).displayHelp(request, printWriter);
}
protected <T> Optional<T> returnFirstPresentOrEmpty(Function<O, Optional<T>> getter) {
for (O option : options) {
Optional<T> o = getter.apply(option);
if (o.isPresent()) {
return o;
}
}
return Optional.empty();
}
protected Optional<List<String>> collectListIfPresentOrEmpty(Function<O, Optional<List<String>>> getter) {
int had = 0;
ArrayList<String> items = new ArrayList<>();
for (O option : options) {
Optional<List<String>> o = getter.apply(option);
if (o.isPresent()) {
had++;
items.addAll(o.get());
}
}
return had == 0 ? Optional.empty() : Optional.of(List.copyOf(items));
}
protected Optional<Map<String, String>> collectMapIfPresentOrEmpty(
Function<O, Optional<Map<String, String>>> getter) {
int had = 0;
HashMap<String, String> items = new HashMap<>();
for (O option : options) {
Optional<Map<String, String>> up = getter.apply(option);
if (up.isPresent()) {
had++;
for (Map.Entry<String, String> entry : up.get().entrySet()) {
items.putIfAbsent(entry.getKey(), entry.getValue());
}
}
}
return had == 0 ? Optional.empty() : Optional.of(Map.copyOf(items));
}
}