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// Copyright (C) 2009 The Android Open Source Project
//
// 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 com.google.gerrit.sshd;
import com.google.auto.value.AutoAnnotation;
import com.google.inject.Key;
import java.lang.annotation.Annotation;
import org.apache.sshd.server.Command;
/** Utilities to support {@link CommandName} construction. */
public class Commands {
/** Magic value signaling the top level. */
public static final String ROOT = "";
/** Magic value signaling the top level. */
public static final CommandName CMD_ROOT = named(ROOT);
public static Key<Command> key(String name) {
return key(named(name));
}
public static Key<Command> key(CommandName name) {
return Key.get(Command.class, name);
}
public static Key<Command> key(CommandName parent, String name) {
return Key.get(Command.class, named(parent, name));
}
public static Key<Command> key(CommandName parent, String name, String descr) {
return Key.get(Command.class, named(parent, name, descr));
}
/** Create a CommandName annotation for the supplied name. */
@AutoAnnotation
public static CommandName named(String value) {
return new AutoAnnotation_Commands_named(value);
}
/** Create a CommandName annotation for the supplied name. */
public static CommandName named(CommandName parent, String name) {
return new NestedCommandNameImpl(parent, name);
}
/** Create a CommandName annotation for the supplied name and description. */
public static CommandName named(CommandName parent, String name, String descr) {
return new NestedCommandNameImpl(parent, name, descr);
}
/** Return the name of this command, possibly including any parents. */
public static String nameOf(CommandName name) {
if (name instanceof NestedCommandNameImpl) {
return nameOf(((NestedCommandNameImpl) name).parent) + " " + name.value();
}
return name.value();
}
/** Is the second command a direct child of the first command? */
public static boolean isChild(CommandName parent, CommandName name) {
if (name instanceof NestedCommandNameImpl) {
return parent.equals(((NestedCommandNameImpl) name).parent);
}
if (parent == CMD_ROOT) {
return true;
}
return false;
}
static CommandName parentOf(CommandName name) {
if (name instanceof NestedCommandNameImpl) {
return ((NestedCommandNameImpl) name).parent;
}
return null;
}
static final class NestedCommandNameImpl implements CommandName {
private final CommandName parent;
private final String name;
private final String descr;
NestedCommandNameImpl(CommandName parent, String name) {
this.parent = parent;
this.name = name;
this.descr = "";
}
NestedCommandNameImpl(CommandName parent, String name, String descr) {
this.parent = parent;
this.name = name;
this.descr = descr;
}
@Override
public String value() {
return name;
}
public String descr() {
return descr;
}
@Override
public Class<? extends Annotation> annotationType() {
return CommandName.class;
}
@Override
public int hashCode() {
return parent.hashCode() * 31 + value().hashCode();
}
@Override
public boolean equals(Object obj) {
return obj instanceof NestedCommandNameImpl
&& parent.equals(((NestedCommandNameImpl) obj).parent)
&& value().equals(((NestedCommandNameImpl) obj).value());
}
@Override
public String toString() {
return "CommandName[" + nameOf(this) + "]";
}
}
private Commands() {}
}
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