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/*
* Copyright 2016-2019 Ping Identity Corporation
* All Rights Reserved.
*/
/*
* Copyright (C) 2016-2019 Ping Identity Corporation
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License (GPLv2 only)
* or the terms of the GNU Lesser General Public License (LGPLv2.1 only)
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see .
*/
package com.unboundid.util.args;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import com.unboundid.util.Mutable;
import com.unboundid.util.ObjectPair;
import com.unboundid.util.StaticUtils;
import com.unboundid.util.ThreadSafety;
import com.unboundid.util.ThreadSafetyLevel;
import static com.unboundid.util.args.ArgsMessages.*;
/**
* This class provides a data structure that represents a subcommand that can be
* used in conjunction with the argument parser. A subcommand can be used to
* allow a single command to do multiple different things. A subcommand is
* represented in the argument list as a string that is not prefixed by any
* dashes, and there can be at most one subcommand in the argument list. Each
* subcommand has its own argument parser that defines the arguments available
* for use with that subcommand, and the tool still provides support for global
* arguments that are not associated with any of the subcommands.
*
* The use of subcommands imposes the following constraints on an argument
* parser:
*
*
* Each subcommand must be registered with the argument parser that defines
* the global arguments for the tool. Subcommands cannot be registered with
* a subcommand's argument parser (i.e., you cannot have a subcommand with
* its own subcommands).
*
*
* There must not be any conflicts between the global arguments and the
* subcommand-specific arguments. However, there can be conflicts between
* the arguments used across separate subcommands.
*
*
* If the global argument parser cannot support both unnamed subcommands and
* unnamed trailing arguments.
*
*
* Global arguments can exist anywhere in the argument list, whether before
* or after the subcommand. Subcommand-specific arguments must only appear
* after the subcommand in the argument list.
*
*
*/
@Mutable()
@ThreadSafety(level=ThreadSafetyLevel.INTERFACE_NOT_THREADSAFE)
public final class SubCommand
{
// The global argument parser with which this subcommand is associated.
private volatile ArgumentParser globalArgumentParser;
// The argument parser for the arguments specific to this subcommand.
private final ArgumentParser subcommandArgumentParser;
// Indicates whether this subcommand was provided in the set of command-line
// arguments.
private volatile boolean isPresent;
// The set of example usages for this subcommand.
private final LinkedHashMap exampleUsages;
// The names for this subcommand, mapped from an all-lowercase representation
// to an object pair that has the name in the desired case and an indicate
// as to whether the name is hidden.
private final Map> names;
// The description for this subcommand.
private final String description;
/**
* Creates a new subcommand with the provided information.
*
* @param name A name that may be used to reference this subcommand
* in the argument list. It must not be {@code null}
* or empty, and it will be treated in a
* case-insensitive manner.
* @param description The description for this subcommand. It must not be
* {@code null}.
* @param parser The argument parser that will be used to validate
* the subcommand-specific arguments. It must not be
* {@code null}, it must not be configured with any
* subcommands of its own, and it must not be
* configured to allow unnamed trailing arguments.
* @param exampleUsages An optional map correlating a complete set of
* arguments that may be used when running the tool
* with this subcommand (including the subcommand and
* any appropriate global and/or subcommand-specific
* arguments) and a description of the behavior with
* that subcommand.
*
* @throws ArgumentException If there is a problem with the provided name,
* description, or argument parser.
*/
public SubCommand(final String name, final String description,
final ArgumentParser parser,
final LinkedHashMap exampleUsages)
throws ArgumentException
{
names = new LinkedHashMap<>(StaticUtils.computeMapCapacity(5));
addName(name);
this.description = description;
if ((description == null) || description.isEmpty())
{
throw new ArgumentException(
ERR_SUBCOMMAND_DESCRIPTION_NULL_OR_EMPTY.get());
}
subcommandArgumentParser = parser;
if (parser == null)
{
throw new ArgumentException(ERR_SUBCOMMAND_PARSER_NULL.get());
}
else if (parser.allowsTrailingArguments())
{
throw new ArgumentException(
ERR_SUBCOMMAND_PARSER_ALLOWS_TRAILING_ARGS.get());
}
else if (parser.hasSubCommands())
{
throw new ArgumentException(ERR_SUBCOMMAND_PARSER_HAS_SUBCOMMANDS.get());
}
if (exampleUsages == null)
{
this.exampleUsages =
new LinkedHashMap<>(StaticUtils.computeMapCapacity(10));
}
else
{
this.exampleUsages = new LinkedHashMap<>(exampleUsages);
}
isPresent = false;
globalArgumentParser = null;
}
/**
* Creates a new subcommand that is a "clean" copy of the provided source
* subcommand.
*
* @param source The source subcommand to use for this subcommand.
*/
private SubCommand(final SubCommand source)
{
names = new LinkedHashMap<>(source.names);
description = source.description;
subcommandArgumentParser =
new ArgumentParser(source.subcommandArgumentParser, this);
exampleUsages = new LinkedHashMap<>(source.exampleUsages);
isPresent = false;
globalArgumentParser = null;
}
/**
* Retrieves the primary name for this subcommand, which is the first name
* that was assigned to it.
*
* @return The primary name for this subcommand.
*/
public String getPrimaryName()
{
return names.values().iterator().next().getFirst();
}
/**
* Retrieves the list of all names, including hidden names, for this
* subcommand.
*
* @return The list of all names for this subcommand.
*/
public List getNames()
{
return getNames(true);
}
/**
* Retrieves a list of the non-hidden names for this subcommand.
*
*
* @param includeHidden Indicates whether to include hidden names in the
* list that is returned.
*
* @return A list of the non-hidden names for this subcommand.
*/
public List getNames(final boolean includeHidden)
{
final ArrayList nameList = new ArrayList<>(names.size());
for (final ObjectPair p : names.values())
{
if (includeHidden || (! p.getSecond()))
{
nameList.add(p.getFirst());
}
}
return Collections.unmodifiableList(nameList);
}
/**
* Indicates whether the provided name is assigned to this subcommand.
*
* @param name The name for which to make the determination. It must not be
* {@code null}.
*
* @return {@code true} if the provided name is assigned to this subcommand,
* or {@code false} if not.
*/
public boolean hasName(final String name)
{
return names.containsKey(StaticUtils.toLowerCase(name));
}
/**
* Adds the provided name that may be used to reference this subcommand. It
* will not be hidden.
*
* @param name A name that may be used to reference this subcommand in the
* argument list. It must not be {@code null} or empty, and it
* will be treated in a case-insensitive manner.
*
* @throws ArgumentException If the provided name is already registered with
* this subcommand, or with another subcommand
* also registered with the global argument
* parser.
*/
public void addName(final String name)
throws ArgumentException
{
addName(name, false);
}
/**
* Adds the provided name that may be used to reference this subcommand.
*
* @param name A name that may be used to reference this subcommand in
* the argument list. It must not be {@code null} or empty,
* and it will be treated in a case-insensitive manner.
* @param isHidden Indicates whether the provided name should be hidden. A
* hidden name may be used to invoke this subcommand but
* will not be displayed in usage information.
*
* @throws ArgumentException If the provided name is already registered with
* this subcommand, or with another subcommand
* also registered with the global argument
* parser.
*/
public void addName(final String name, final boolean isHidden)
throws ArgumentException
{
if ((name == null) || name.isEmpty())
{
throw new ArgumentException(ERR_SUBCOMMAND_NAME_NULL_OR_EMPTY.get());
}
final String lowerName = StaticUtils.toLowerCase(name);
if (names.containsKey(lowerName))
{
throw new ArgumentException(ERR_SUBCOMMAND_NAME_ALREADY_IN_USE.get(name));
}
if (globalArgumentParser != null)
{
globalArgumentParser.addSubCommand(name, this);
}
names.put(lowerName, new ObjectPair<>(name, isHidden));
}
/**
* Retrieves the description for this subcommand.
*
* @return The description for this subcommand.
*/
public String getDescription()
{
return description;
}
/**
* Retrieves the argument parser that will be used to process arguments
* specific to this subcommand.
*
* @return The argument parser that will be used to process arguments
* specific to this subcommand.
*/
public ArgumentParser getArgumentParser()
{
return subcommandArgumentParser;
}
/**
* Indicates whether this subcommand was provided in the set of command-line
* arguments.
*
* @return {@code true} if this subcommand was provided in the set of
* command-line arguments, or {@code false} if not.
*/
public boolean isPresent()
{
return isPresent;
}
/**
* Indicates that this subcommand was provided in the set of command-line
* arguments.
*/
void setPresent()
{
isPresent = true;
}
/**
* Retrieves the global argument parser with which this subcommand is
* registered.
*
* @return The global argument parser with which this subcommand is
* registered.
*/
ArgumentParser getGlobalArgumentParser()
{
return globalArgumentParser;
}
/**
* Sets the global argument parser for this subcommand.
*
* @param globalArgumentParser The global argument parser for this
* subcommand.
*/
void setGlobalArgumentParser(final ArgumentParser globalArgumentParser)
{
this.globalArgumentParser = globalArgumentParser;
}
/**
* Retrieves a set of information that may be used to generate example usage
* information when the tool is run with this subcommand. Each element in the
* returned map should consist of a map between an example set of arguments
* (including the subcommand name) and a string that describes the behavior of
* the tool when invoked with that set of arguments.
*
* @return A set of information that may be used to generate example usage
* information, or an empty map if no example usages are available.
*/
public LinkedHashMap getExampleUsages()
{
return exampleUsages;
}
/**
* Creates a copy of this subcommand that is "clean" and appears as if it has
* not been used to parse an argument set. The new subcommand will have all
* of the same names and argument constraints as this subcommand.
*
* @return The "clean" copy of this subcommand.
*/
public SubCommand getCleanCopy()
{
return new SubCommand(this);
}
/**
* Retrieves a string representation of this subcommand.
*
* @return A string representation of this subcommand.
*/
@Override()
public String toString()
{
final StringBuilder buffer = new StringBuilder();
toString(buffer);
return buffer.toString();
}
/**
* Appends a string representation of this subcommand to the provided buffer.
*
* @param buffer The buffer to which the information should be appended.
*/
public void toString(final StringBuilder buffer)
{
buffer.append("SubCommand(");
if (names.size() == 1)
{
buffer.append("name='");
buffer.append(names.values().iterator().next());
buffer.append('\'');
}
else
{
buffer.append("names={");
final Iterator> iterator =
names.values().iterator();
while (iterator.hasNext())
{
buffer.append('\'');
buffer.append(iterator.next().getFirst());
buffer.append('\'');
if (iterator.hasNext())
{
buffer.append(", ");
}
}
buffer.append('}');
}
buffer.append(", description='");
buffer.append(description);
buffer.append("', parser=");
subcommandArgumentParser.toString(buffer);
buffer.append(')');
}
}
