/
CliCommand.java
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/
CliCommand.java
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/**
* 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.zookeeper.cli;
import java.io.PrintStream;
import java.util.Map;
import org.apache.zookeeper.ZooKeeper;
/**
* base class for all CLI commands
*/
abstract public class CliCommand {
protected ZooKeeper zk;
protected PrintStream out;
protected PrintStream err;
private String cmdStr;
private String optionStr;
/**
* a CLI command with command string and options.
* Using System.out and System.err for printing
* @param cmdStr the string used to call this command
* @param optionStr the string used to call this command
*/
public CliCommand(String cmdStr, String optionStr) {
this.out = System.out;
this.err = System.err;
this.cmdStr = cmdStr;
this.optionStr = optionStr;
}
/**
* Set out printStream (useable for testing)
* @param out
*/
public void setOut(PrintStream out) {
this.out = out;
}
/**
* Set err printStream (useable for testing)
* @param err
*/
public void setErr(PrintStream err) {
this.err = err;
}
/**
* set the zookeper instance
* @param zk the zookeper instance
*/
public void setZk(ZooKeeper zk) {
this.zk = zk;
}
/**
* get the string used to call this command
* @return
*/
public String getCmdStr() {
return cmdStr;
}
/**
* get the option string
* @return
*/
public String getOptionStr() {
return optionStr;
}
/**
* get a usage string, contains the command and the options
* @return
*/
public String getUsageStr() {
return cmdStr + " " + optionStr;
}
/**
* add this command to a map. Use the command string as key.
* @param cmdMap
*/
public void addToMap(Map<String, CliCommand> cmdMap) {
cmdMap.put(cmdStr, this);
}
/**
* parse the command arguments
* @param cmdArgs
* @return this CliCommand
* @throws CliParseException
*/
abstract public CliCommand parse(String cmdArgs[]) throws CliParseException;
/**
*
* @return
* @throws CliException
*/
abstract public boolean exec() throws CliException;
}