org.elasticsearch.hadoop.cli.ConsolePrompt Maven / Gradle / Ivy
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* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch 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.elasticsearch.hadoop.cli;
import java.io.BufferedReader;
import java.io.Console;
import java.io.IOError;
import java.io.IOException;
import java.io.InputStreamReader;
public class ConsolePrompt implements Prompt {
private final Console console;
public ConsolePrompt() {
this.console = System.console();
}
@Override
public void println() {
System.out.println();
}
@Override
public void println(String s) {
System.out.println(s);
}
@Override
public void printf(String format, Object... args) {
System.out.printf(format, args);
}
@Override
public String readLine() {
if (console == null) {
try {
return new BufferedReader(new InputStreamReader(System.in)).readLine();
} catch (IOException e) {
throw new IOError(e);
}
} else {
return this.console.readLine();
}
}
@Override
public String readLine(String format, Object... args) {
printf(format, args);
return readLine();
}
@Override
public char[] readPassword(String prompt, Object... args) {
if (console == null) {
throw new IllegalStateException("Cannot disable console echo to read password");
}
return this.console.readPassword(prompt, args);
}
}