/**
* 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.karaf.tooling.commands;
import java.lang.annotation.Annotation;
import java.lang.reflect.Field;
import org.apache.karaf.shell.api.action.Action;
import org.apache.karaf.shell.api.action.Argument;
public abstract class AbstractCommandHelpPrinter implements CommandHelpPrinter {
protected Argument replaceDefaultArgument(Field field, Argument argument) {
if (Argument.DEFAULT.equals(argument.name())) {
final Argument delegate = argument;
final String name = field.getName();
argument = new Argument() {
public String name() {
return name;
}
public String description() {
return delegate.description();
}
public boolean required() {
return delegate.required();
}
public int index() {
return delegate.index();
}
public boolean multiValued() {
return delegate.multiValued();
}
public String valueToShowInHelp() {
return delegate.valueToShowInHelp();
}
public Class<? extends Annotation> annotationType() {
return delegate.annotationType();
}
};
}
return argument;
}
protected Object getDefaultValue(Action action, Field field) {
try {
field.setAccessible(true);
return field.get(action);
} catch (Exception e) {
return null;
}
}
protected String getDefaultValueString(Object o) {
if (o != null
&& (!(o instanceof Boolean) || ((Boolean) o))
&& (!(o instanceof Number) || ((Number) o).doubleValue() != 0.0)) {
return o.toString();
} else {
return null;
}
}
}