org.apache.druid.java.util.common.Numbers Maven / Gradle / Ivy
/*
* 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.druid.java.util.common;
public final class Numbers
{
/**
* Parse the given object as a {@code long}. The input object can be a {@link String} or one of the implementations of
* {@link Number}. You may want to use {@code GuavaUtils.tryParseLong()} instead if the input is a nullable string and
* you want to avoid any exceptions.
*
* @throws NumberFormatException if the input is an unparseable string.
* @throws NullPointerException if the input is null.
* @throws ISE if the input is not a string or a number.
*/
public static long parseLong(Object val)
{
if (val instanceof String) {
return Long.parseLong((String) val);
} else if (val instanceof Number) {
return ((Number) val).longValue();
} else {
if (val == null) {
throw new NullPointerException("Input is null");
} else {
throw new ISE("Unknown type [%s]", val.getClass());
}
}
}
/**
* Parse the given object as a {@code int}. The input object can be a {@link String} or one of the implementations of
* {@link Number}.
*
* @throws NumberFormatException if the input is an unparseable string.
* @throws NullPointerException if the input is null.
* @throws ISE if the input is not a string or a number.
*/
public static int parseInt(Object val)
{
if (val instanceof String) {
return Integer.parseInt((String) val);
} else if (val instanceof Number) {
return ((Number) val).intValue();
} else {
if (val == null) {
throw new NullPointerException("Input is null");
} else {
throw new ISE("Unknown type [%s]", val.getClass());
}
}
}
/**
* Parse the given object as a {@code boolean}. The input object can be a {@link String} or {@link Boolean}.
*
* @return {@code true} only if the input is a {@link Boolean} representing {@code true} or a {@link String} of
* {@code "true"}.
*
* @throws NullPointerException if the input is null.
* @throws ISE if the input is not a string or a number.
*/
public static boolean parseBoolean(Object val)
{
if (val instanceof String) {
return Boolean.parseBoolean((String) val);
} else if (val instanceof Boolean) {
return (boolean) val;
} else {
if (val == null) {
throw new NullPointerException("Input is null");
} else {
throw new ISE("Unknown type [%s]", val.getClass());
}
}
}
private Numbers()
{
}
}