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Posted to commits@commons.apache.org by gg...@apache.org on 2016/02/24 22:42:48 UTC
[1/2] [lang] Statement unnecessarily nested within else clause.
Repository: commons-lang
Updated Branches:
refs/heads/master 0432e83a4 -> ddcf6aa50
http://git-wip-us.apache.org/repos/asf/commons-lang/blob/ddcf6aa5/src/main/java/org/apache/commons/lang3/math/NumberUtils.java
----------------------------------------------------------------------
diff --git a/src/main/java/org/apache/commons/lang3/math/NumberUtils.java b/src/main/java/org/apache/commons/lang3/math/NumberUtils.java
index d9a569f..3ca1d3e 100644
--- a/src/main/java/org/apache/commons/lang3/math/NumberUtils.java
+++ b/src/main/java/org/apache/commons/lang3/math/NumberUtils.java
@@ -1,1593 +1,1592 @@
-/*
- * 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.commons.lang3.math;
-
-import java.lang.reflect.Array;
-import java.math.BigDecimal;
-import java.math.BigInteger;
-
-import org.apache.commons.lang3.StringUtils;
-import org.apache.commons.lang3.Validate;
-
-/**
- * <p>Provides extra functionality for Java Number classes.</p>
- *
- * @since 2.0
- */
-public class NumberUtils {
-
- /** Reusable Long constant for zero. */
- public static final Long LONG_ZERO = Long.valueOf(0L);
- /** Reusable Long constant for one. */
- public static final Long LONG_ONE = Long.valueOf(1L);
- /** Reusable Long constant for minus one. */
- public static final Long LONG_MINUS_ONE = Long.valueOf(-1L);
- /** Reusable Integer constant for zero. */
- public static final Integer INTEGER_ZERO = Integer.valueOf(0);
- /** Reusable Integer constant for one. */
- public static final Integer INTEGER_ONE = Integer.valueOf(1);
- /** Reusable Integer constant for minus one. */
- public static final Integer INTEGER_MINUS_ONE = Integer.valueOf(-1);
- /** Reusable Short constant for zero. */
- public static final Short SHORT_ZERO = Short.valueOf((short) 0);
- /** Reusable Short constant for one. */
- public static final Short SHORT_ONE = Short.valueOf((short) 1);
- /** Reusable Short constant for minus one. */
- public static final Short SHORT_MINUS_ONE = Short.valueOf((short) -1);
- /** Reusable Byte constant for zero. */
- public static final Byte BYTE_ZERO = Byte.valueOf((byte) 0);
- /** Reusable Byte constant for one. */
- public static final Byte BYTE_ONE = Byte.valueOf((byte) 1);
- /** Reusable Byte constant for minus one. */
- public static final Byte BYTE_MINUS_ONE = Byte.valueOf((byte) -1);
- /** Reusable Double constant for zero. */
- public static final Double DOUBLE_ZERO = Double.valueOf(0.0d);
- /** Reusable Double constant for one. */
- public static final Double DOUBLE_ONE = Double.valueOf(1.0d);
- /** Reusable Double constant for minus one. */
- public static final Double DOUBLE_MINUS_ONE = Double.valueOf(-1.0d);
- /** Reusable Float constant for zero. */
- public static final Float FLOAT_ZERO = Float.valueOf(0.0f);
- /** Reusable Float constant for one. */
- public static final Float FLOAT_ONE = Float.valueOf(1.0f);
- /** Reusable Float constant for minus one. */
- public static final Float FLOAT_MINUS_ONE = Float.valueOf(-1.0f);
-
- /**
- * <p><code>NumberUtils</code> instances should NOT be constructed in standard programming.
- * Instead, the class should be used as <code>NumberUtils.toInt("6");</code>.</p>
- *
- * <p>This constructor is public to permit tools that require a JavaBean instance
- * to operate.</p>
- */
- public NumberUtils() {
- super();
- }
-
- //-----------------------------------------------------------------------
- /**
- * <p>Convert a <code>String</code> to an <code>int</code>, returning
- * <code>zero</code> if the conversion fails.</p>
- *
- * <p>If the string is <code>null</code>, <code>zero</code> is returned.</p>
- *
- * <pre>
- * NumberUtils.toInt(null) = 0
- * NumberUtils.toInt("") = 0
- * NumberUtils.toInt("1") = 1
- * </pre>
- *
- * @param str the string to convert, may be null
- * @return the int represented by the string, or <code>zero</code> if
- * conversion fails
- * @since 2.1
- */
- public static int toInt(final String str) {
- return toInt(str, 0);
- }
-
- /**
- * <p>Convert a <code>String</code> to an <code>int</code>, returning a
- * default value if the conversion fails.</p>
- *
- * <p>If the string is <code>null</code>, the default value is returned.</p>
- *
- * <pre>
- * NumberUtils.toInt(null, 1) = 1
- * NumberUtils.toInt("", 1) = 1
- * NumberUtils.toInt("1", 0) = 1
- * </pre>
- *
- * @param str the string to convert, may be null
- * @param defaultValue the default value
- * @return the int represented by the string, or the default if conversion fails
- * @since 2.1
- */
- public static int toInt(final String str, final int defaultValue) {
- if(str == null) {
- return defaultValue;
- }
- try {
- return Integer.parseInt(str);
- } catch (final NumberFormatException nfe) {
- return defaultValue;
- }
- }
-
- /**
- * <p>Convert a <code>String</code> to a <code>long</code>, returning
- * <code>zero</code> if the conversion fails.</p>
- *
- * <p>If the string is <code>null</code>, <code>zero</code> is returned.</p>
- *
- * <pre>
- * NumberUtils.toLong(null) = 0L
- * NumberUtils.toLong("") = 0L
- * NumberUtils.toLong("1") = 1L
- * </pre>
- *
- * @param str the string to convert, may be null
- * @return the long represented by the string, or <code>0</code> if
- * conversion fails
- * @since 2.1
- */
- public static long toLong(final String str) {
- return toLong(str, 0L);
- }
-
- /**
- * <p>Convert a <code>String</code> to a <code>long</code>, returning a
- * default value if the conversion fails.</p>
- *
- * <p>If the string is <code>null</code>, the default value is returned.</p>
- *
- * <pre>
- * NumberUtils.toLong(null, 1L) = 1L
- * NumberUtils.toLong("", 1L) = 1L
- * NumberUtils.toLong("1", 0L) = 1L
- * </pre>
- *
- * @param str the string to convert, may be null
- * @param defaultValue the default value
- * @return the long represented by the string, or the default if conversion fails
- * @since 2.1
- */
- public static long toLong(final String str, final long defaultValue) {
- if (str == null) {
- return defaultValue;
- }
- try {
- return Long.parseLong(str);
- } catch (final NumberFormatException nfe) {
- return defaultValue;
- }
- }
-
- /**
- * <p>Convert a <code>String</code> to a <code>float</code>, returning
- * <code>0.0f</code> if the conversion fails.</p>
- *
- * <p>If the string <code>str</code> is <code>null</code>,
- * <code>0.0f</code> is returned.</p>
- *
- * <pre>
- * NumberUtils.toFloat(null) = 0.0f
- * NumberUtils.toFloat("") = 0.0f
- * NumberUtils.toFloat("1.5") = 1.5f
- * </pre>
- *
- * @param str the string to convert, may be <code>null</code>
- * @return the float represented by the string, or <code>0.0f</code>
- * if conversion fails
- * @since 2.1
- */
- public static float toFloat(final String str) {
- return toFloat(str, 0.0f);
- }
-
- /**
- * <p>Convert a <code>String</code> to a <code>float</code>, returning a
- * default value if the conversion fails.</p>
- *
- * <p>If the string <code>str</code> is <code>null</code>, the default
- * value is returned.</p>
- *
- * <pre>
- * NumberUtils.toFloat(null, 1.1f) = 1.0f
- * NumberUtils.toFloat("", 1.1f) = 1.1f
- * NumberUtils.toFloat("1.5", 0.0f) = 1.5f
- * </pre>
- *
- * @param str the string to convert, may be <code>null</code>
- * @param defaultValue the default value
- * @return the float represented by the string, or defaultValue
- * if conversion fails
- * @since 2.1
- */
- public static float toFloat(final String str, final float defaultValue) {
- if (str == null) {
- return defaultValue;
- }
- try {
- return Float.parseFloat(str);
- } catch (final NumberFormatException nfe) {
- return defaultValue;
- }
- }
-
- /**
- * <p>Convert a <code>String</code> to a <code>double</code>, returning
- * <code>0.0d</code> if the conversion fails.</p>
- *
- * <p>If the string <code>str</code> is <code>null</code>,
- * <code>0.0d</code> is returned.</p>
- *
- * <pre>
- * NumberUtils.toDouble(null) = 0.0d
- * NumberUtils.toDouble("") = 0.0d
- * NumberUtils.toDouble("1.5") = 1.5d
- * </pre>
- *
- * @param str the string to convert, may be <code>null</code>
- * @return the double represented by the string, or <code>0.0d</code>
- * if conversion fails
- * @since 2.1
- */
- public static double toDouble(final String str) {
- return toDouble(str, 0.0d);
- }
-
- /**
- * <p>Convert a <code>String</code> to a <code>double</code>, returning a
- * default value if the conversion fails.</p>
- *
- * <p>If the string <code>str</code> is <code>null</code>, the default
- * value is returned.</p>
- *
- * <pre>
- * NumberUtils.toDouble(null, 1.1d) = 1.1d
- * NumberUtils.toDouble("", 1.1d) = 1.1d
- * NumberUtils.toDouble("1.5", 0.0d) = 1.5d
- * </pre>
- *
- * @param str the string to convert, may be <code>null</code>
- * @param defaultValue the default value
- * @return the double represented by the string, or defaultValue
- * if conversion fails
- * @since 2.1
- */
- public static double toDouble(final String str, final double defaultValue) {
- if (str == null) {
- return defaultValue;
- }
- try {
- return Double.parseDouble(str);
- } catch (final NumberFormatException nfe) {
- return defaultValue;
- }
- }
-
- //-----------------------------------------------------------------------
- /**
- * <p>Convert a <code>String</code> to a <code>byte</code>, returning
- * <code>zero</code> if the conversion fails.</p>
- *
- * <p>If the string is <code>null</code>, <code>zero</code> is returned.</p>
- *
- * <pre>
- * NumberUtils.toByte(null) = 0
- * NumberUtils.toByte("") = 0
- * NumberUtils.toByte("1") = 1
- * </pre>
- *
- * @param str the string to convert, may be null
- * @return the byte represented by the string, or <code>zero</code> if
- * conversion fails
- * @since 2.5
- */
- public static byte toByte(final String str) {
- return toByte(str, (byte) 0);
- }
-
- /**
- * <p>Convert a <code>String</code> to a <code>byte</code>, returning a
- * default value if the conversion fails.</p>
- *
- * <p>If the string is <code>null</code>, the default value is returned.</p>
- *
- * <pre>
- * NumberUtils.toByte(null, 1) = 1
- * NumberUtils.toByte("", 1) = 1
- * NumberUtils.toByte("1", 0) = 1
- * </pre>
- *
- * @param str the string to convert, may be null
- * @param defaultValue the default value
- * @return the byte represented by the string, or the default if conversion fails
- * @since 2.5
- */
- public static byte toByte(final String str, final byte defaultValue) {
- if(str == null) {
- return defaultValue;
- }
- try {
- return Byte.parseByte(str);
- } catch (final NumberFormatException nfe) {
- return defaultValue;
- }
- }
-
- /**
- * <p>Convert a <code>String</code> to a <code>short</code>, returning
- * <code>zero</code> if the conversion fails.</p>
- *
- * <p>If the string is <code>null</code>, <code>zero</code> is returned.</p>
- *
- * <pre>
- * NumberUtils.toShort(null) = 0
- * NumberUtils.toShort("") = 0
- * NumberUtils.toShort("1") = 1
- * </pre>
- *
- * @param str the string to convert, may be null
- * @return the short represented by the string, or <code>zero</code> if
- * conversion fails
- * @since 2.5
- */
- public static short toShort(final String str) {
- return toShort(str, (short) 0);
- }
-
- /**
- * <p>Convert a <code>String</code> to an <code>short</code>, returning a
- * default value if the conversion fails.</p>
- *
- * <p>If the string is <code>null</code>, the default value is returned.</p>
- *
- * <pre>
- * NumberUtils.toShort(null, 1) = 1
- * NumberUtils.toShort("", 1) = 1
- * NumberUtils.toShort("1", 0) = 1
- * </pre>
- *
- * @param str the string to convert, may be null
- * @param defaultValue the default value
- * @return the short represented by the string, or the default if conversion fails
- * @since 2.5
- */
- public static short toShort(final String str, final short defaultValue) {
- if(str == null) {
- return defaultValue;
- }
- try {
- return Short.parseShort(str);
- } catch (final NumberFormatException nfe) {
- return defaultValue;
- }
- }
-
- //-----------------------------------------------------------------------
- // must handle Long, Float, Integer, Float, Short,
- // BigDecimal, BigInteger and Byte
- // useful methods:
- // Byte.decode(String)
- // Byte.valueOf(String,int radix)
- // Byte.valueOf(String)
- // Double.valueOf(String)
- // Float.valueOf(String)
- // Float.valueOf(String)
- // Integer.valueOf(String,int radix)
- // Integer.valueOf(String)
- // Integer.decode(String)
- // Integer.getInteger(String)
- // Integer.getInteger(String,int val)
- // Integer.getInteger(String,Integer val)
- // Integer.valueOf(String)
- // Double.valueOf(String)
- // new Byte(String)
- // Long.valueOf(String)
- // Long.getLong(String)
- // Long.getLong(String,int)
- // Long.getLong(String,Integer)
- // Long.valueOf(String,int)
- // Long.valueOf(String)
- // Short.valueOf(String)
- // Short.decode(String)
- // Short.valueOf(String,int)
- // Short.valueOf(String)
- // new BigDecimal(String)
- // new BigInteger(String)
- // new BigInteger(String,int radix)
- // Possible inputs:
- // 45 45.5 45E7 4.5E7 Hex Oct Binary xxxF xxxD xxxf xxxd
- // plus minus everything. Prolly more. A lot are not separable.
-
- /**
- * <p>Turns a string value into a java.lang.Number.</p>
- *
- * <p>If the string starts with {@code 0x} or {@code -0x} (lower or upper case) or {@code #} or {@code -#}, it
- * will be interpreted as a hexadecimal Integer - or Long, if the number of digits after the
- * prefix is more than 8 - or BigInteger if there are more than 16 digits.
- * </p>
- * <p>Then, the value is examined for a type qualifier on the end, i.e. one of
- * <code>'f','F','d','D','l','L'</code>. If it is found, it starts
- * trying to create successively larger types from the type specified
- * until one is found that can represent the value.</p>
- *
- * <p>If a type specifier is not found, it will check for a decimal point
- * and then try successively larger types from <code>Integer</code> to
- * <code>BigInteger</code> and from <code>Float</code> to
- * <code>BigDecimal</code>.</p>
- *
- * <p>
- * Integral values with a leading {@code 0} will be interpreted as octal; the returned number will
- * be Integer, Long or BigDecimal as appropriate.
- * </p>
- *
- * <p>Returns <code>null</code> if the string is <code>null</code>.</p>
- *
- * <p>This method does not trim the input string, i.e., strings with leading
- * or trailing spaces will generate NumberFormatExceptions.</p>
- *
- * @param str String containing a number, may be null
- * @return Number created from the string (or null if the input is null)
- * @throws NumberFormatException if the value cannot be converted
- */
- public static Number createNumber(final String str) throws NumberFormatException {
- if (str == null) {
- return null;
- }
- if (StringUtils.isBlank(str)) {
- throw new NumberFormatException("A blank string is not a valid number");
- }
- // Need to deal with all possible hex prefixes here
- final String[] hex_prefixes = {"0x", "0X", "-0x", "-0X", "#", "-#"};
- int pfxLen = 0;
- for(final String pfx : hex_prefixes) {
- if (str.startsWith(pfx)) {
- pfxLen += pfx.length();
- break;
- }
- }
- if (pfxLen > 0) { // we have a hex number
- char firstSigDigit = 0; // strip leading zeroes
- for(int i = pfxLen; i < str.length(); i++) {
- firstSigDigit = str.charAt(i);
- if (firstSigDigit == '0') { // count leading zeroes
- pfxLen++;
- } else {
- break;
- }
- }
- final int hexDigits = str.length() - pfxLen;
- if (hexDigits > 16 || (hexDigits == 16 && firstSigDigit > '7')) { // too many for Long
- return createBigInteger(str);
- }
- if (hexDigits > 8 || (hexDigits == 8 && firstSigDigit > '7')) { // too many for an int
- return createLong(str);
- }
- return createInteger(str);
- }
- final char lastChar = str.charAt(str.length() - 1);
- String mant;
- String dec;
- String exp;
- final int decPos = str.indexOf('.');
- final int expPos = str.indexOf('e') + str.indexOf('E') + 1; // assumes both not present
- // if both e and E are present, this is caught by the checks on expPos (which prevent IOOBE)
- // and the parsing which will detect if e or E appear in a number due to using the wrong offset
-
- int numDecimals = 0; // Check required precision (LANG-693)
- if (decPos > -1) { // there is a decimal point
-
- if (expPos > -1) { // there is an exponent
- if (expPos < decPos || expPos > str.length()) { // prevents double exponent causing IOOBE
- throw new NumberFormatException(str + " is not a valid number.");
- }
- dec = str.substring(decPos + 1, expPos);
- } else {
- dec = str.substring(decPos + 1);
- }
- mant = getMantissa(str, decPos);
- numDecimals = dec.length(); // gets number of digits past the decimal to ensure no loss of precision for floating point numbers.
- } else {
- if (expPos > -1) {
- if (expPos > str.length()) { // prevents double exponent causing IOOBE
- throw new NumberFormatException(str + " is not a valid number.");
- }
- mant = getMantissa(str, expPos);
- } else {
- mant = getMantissa(str);
- }
- dec = null;
- }
- if (!Character.isDigit(lastChar) && lastChar != '.') {
- if (expPos > -1 && expPos < str.length() - 1) {
- exp = str.substring(expPos + 1, str.length() - 1);
- } else {
- exp = null;
- }
- //Requesting a specific type..
- final String numeric = str.substring(0, str.length() - 1);
- final boolean allZeros = isAllZeros(mant) && isAllZeros(exp);
- switch (lastChar) {
- case 'l' :
- case 'L' :
- if (dec == null
- && exp == null
- && (numeric.charAt(0) == '-' && isDigits(numeric.substring(1)) || isDigits(numeric))) {
- try {
- return createLong(numeric);
- } catch (final NumberFormatException nfe) { // NOPMD
- // Too big for a long
- }
- return createBigInteger(numeric);
-
- }
- throw new NumberFormatException(str + " is not a valid number.");
- case 'f' :
- case 'F' :
- try {
- final Float f = NumberUtils.createFloat(numeric);
- if (!(f.isInfinite() || (f.floatValue() == 0.0F && !allZeros))) {
- //If it's too big for a float or the float value = 0 and the string
- //has non-zeros in it, then float does not have the precision we want
- return f;
- }
-
- } catch (final NumberFormatException nfe) { // NOPMD
- // ignore the bad number
- }
- //$FALL-THROUGH$
- case 'd' :
- case 'D' :
- try {
- final Double d = NumberUtils.createDouble(numeric);
- if (!(d.isInfinite() || (d.floatValue() == 0.0D && !allZeros))) {
- return d;
- }
- } catch (final NumberFormatException nfe) { // NOPMD
- // ignore the bad number
- }
- try {
- return createBigDecimal(numeric);
- } catch (final NumberFormatException e) { // NOPMD
- // ignore the bad number
- }
- //$FALL-THROUGH$
- default :
- throw new NumberFormatException(str + " is not a valid number.");
-
- }
- }
- //User doesn't have a preference on the return type, so let's start
- //small and go from there...
- if (expPos > -1 && expPos < str.length() - 1) {
- exp = str.substring(expPos + 1, str.length());
- } else {
- exp = null;
- }
- if (dec == null && exp == null) { // no decimal point and no exponent
- //Must be an Integer, Long, Biginteger
- try {
- return createInteger(str);
- } catch (final NumberFormatException nfe) { // NOPMD
- // ignore the bad number
- }
- try {
- return createLong(str);
- } catch (final NumberFormatException nfe) { // NOPMD
- // ignore the bad number
- }
- return createBigInteger(str);
- }
-
- //Must be a Float, Double, BigDecimal
- final boolean allZeros = isAllZeros(mant) && isAllZeros(exp);
- try {
- if(numDecimals <= 7){// If number has 7 or fewer digits past the decimal point then make it a float
- final Float f = createFloat(str);
- if (!(f.isInfinite() || (f.floatValue() == 0.0F && !allZeros))) {
- return f;
- }
- }
- } catch (final NumberFormatException nfe) { // NOPMD
- // ignore the bad number
- }
- try {
- if(numDecimals <= 16){// If number has between 8 and 16 digits past the decimal point then make it a double
- final Double d = createDouble(str);
- if (!(d.isInfinite() || (d.doubleValue() == 0.0D && !allZeros))) {
- return d;
- }
- }
- } catch (final NumberFormatException nfe) { // NOPMD
- // ignore the bad number
- }
-
- return createBigDecimal(str);
- }
-
- /**
- * <p>Utility method for {@link #createNumber(java.lang.String)}.</p>
- *
- * <p>Returns mantissa of the given number.</p>
- *
- * @param str the string representation of the number
- * @return mantissa of the given number
- */
- private static String getMantissa(final String str) {
- return getMantissa(str, str.length());
- }
-
- /**
- * <p>Utility method for {@link #createNumber(java.lang.String)}.</p>
- *
- * <p>Returns mantissa of the given number.</p>
- *
- * @param str the string representation of the number
- * @param stopPos the position of the exponent or decimal point
- * @return mantissa of the given number
- */
- private static String getMantissa(final String str, final int stopPos) {
- final char firstChar = str.charAt(0);
- final boolean hasSign = (firstChar == '-' || firstChar == '+');
-
- return hasSign ? str.substring(1, stopPos) : str.substring(0, stopPos);
- }
-
- /**
- * <p>Utility method for {@link #createNumber(java.lang.String)}.</p>
- *
- * <p>Returns <code>true</code> if s is <code>null</code>.</p>
- *
- * @param str the String to check
- * @return if it is all zeros or <code>null</code>
- */
- private static boolean isAllZeros(final String str) {
- if (str == null) {
- return true;
- }
- for (int i = str.length() - 1; i >= 0; i--) {
- if (str.charAt(i) != '0') {
- return false;
- }
- }
- return str.length() > 0;
- }
-
- //-----------------------------------------------------------------------
- /**
- * <p>Convert a <code>String</code> to a <code>Float</code>.</p>
- *
- * <p>Returns <code>null</code> if the string is <code>null</code>.</p>
- *
- * @param str a <code>String</code> to convert, may be null
- * @return converted <code>Float</code> (or null if the input is null)
- * @throws NumberFormatException if the value cannot be converted
- */
- public static Float createFloat(final String str) {
- if (str == null) {
- return null;
- }
- return Float.valueOf(str);
- }
-
- /**
- * <p>Convert a <code>String</code> to a <code>Double</code>.</p>
- *
- * <p>Returns <code>null</code> if the string is <code>null</code>.</p>
- *
- * @param str a <code>String</code> to convert, may be null
- * @return converted <code>Double</code> (or null if the input is null)
- * @throws NumberFormatException if the value cannot be converted
- */
- public static Double createDouble(final String str) {
- if (str == null) {
- return null;
- }
- return Double.valueOf(str);
- }
-
- /**
- * <p>Convert a <code>String</code> to a <code>Integer</code>, handling
- * hex (0xhhhh) and octal (0dddd) notations.
- * N.B. a leading zero means octal; spaces are not trimmed.</p>
- *
- * <p>Returns <code>null</code> if the string is <code>null</code>.</p>
- *
- * @param str a <code>String</code> to convert, may be null
- * @return converted <code>Integer</code> (or null if the input is null)
- * @throws NumberFormatException if the value cannot be converted
- */
- public static Integer createInteger(final String str) {
- if (str == null) {
- return null;
- }
- // decode() handles 0xAABD and 0777 (hex and octal) as well.
- return Integer.decode(str);
- }
-
- /**
- * <p>Convert a <code>String</code> to a <code>Long</code>;
- * since 3.1 it handles hex (0Xhhhh) and octal (0ddd) notations.
- * N.B. a leading zero means octal; spaces are not trimmed.</p>
- *
- * <p>Returns <code>null</code> if the string is <code>null</code>.</p>
- *
- * @param str a <code>String</code> to convert, may be null
- * @return converted <code>Long</code> (or null if the input is null)
- * @throws NumberFormatException if the value cannot be converted
- */
- public static Long createLong(final String str) {
- if (str == null) {
- return null;
- }
- return Long.decode(str);
- }
-
- /**
- * <p>Convert a <code>String</code> to a <code>BigInteger</code>;
- * since 3.2 it handles hex (0x or #) and octal (0) notations.</p>
- *
- * <p>Returns <code>null</code> if the string is <code>null</code>.</p>
- *
- * @param str a <code>String</code> to convert, may be null
- * @return converted <code>BigInteger</code> (or null if the input is null)
- * @throws NumberFormatException if the value cannot be converted
- */
- public static BigInteger createBigInteger(final String str) {
- if (str == null) {
- return null;
- }
- int pos = 0; // offset within string
- int radix = 10;
- boolean negate = false; // need to negate later?
- if (str.startsWith("-")) {
- negate = true;
- pos = 1;
- }
- if (str.startsWith("0x", pos) || str.startsWith("0X", pos)) { // hex
- radix = 16;
- pos += 2;
- } else if (str.startsWith("#", pos)) { // alternative hex (allowed by Long/Integer)
- radix = 16;
- pos ++;
- } else if (str.startsWith("0", pos) && str.length() > pos + 1) { // octal; so long as there are additional digits
- radix = 8;
- pos ++;
- } // default is to treat as decimal
-
- final BigInteger value = new BigInteger(str.substring(pos), radix);
- return negate ? value.negate() : value;
- }
-
- /**
- * <p>Convert a <code>String</code> to a <code>BigDecimal</code>.</p>
- *
- * <p>Returns <code>null</code> if the string is <code>null</code>.</p>
- *
- * @param str a <code>String</code> to convert, may be null
- * @return converted <code>BigDecimal</code> (or null if the input is null)
- * @throws NumberFormatException if the value cannot be converted
- */
- public static BigDecimal createBigDecimal(final String str) {
- if (str == null) {
- return null;
- }
- // handle JDK1.3.1 bug where "" throws IndexOutOfBoundsException
- if (StringUtils.isBlank(str)) {
- throw new NumberFormatException("A blank string is not a valid number");
- }
- if (str.trim().startsWith("--")) {
- // this is protection for poorness in java.lang.BigDecimal.
- // it accepts this as a legal value, but it does not appear
- // to be in specification of class. OS X Java parses it to
- // a wrong value.
- throw new NumberFormatException(str + " is not a valid number.");
- }
- return new BigDecimal(str);
- }
-
- // Min in array
- //--------------------------------------------------------------------
- /**
- * <p>Returns the minimum value in an array.</p>
- *
- * @param array an array, must not be null or empty
- * @return the minimum value in the array
- * @throws IllegalArgumentException if <code>array</code> is <code>null</code>
- * @throws IllegalArgumentException if <code>array</code> is empty
- * @since 3.4 Changed signature from min(long[]) to min(long...)
- */
- public static long min(final long... array) {
- // Validates input
- validateArray(array);
-
- // Finds and returns min
- long min = array[0];
- for (int i = 1; i < array.length; i++) {
- if (array[i] < min) {
- min = array[i];
- }
- }
-
- return min;
- }
-
- /**
- * <p>Returns the minimum value in an array.</p>
- *
- * @param array an array, must not be null or empty
- * @return the minimum value in the array
- * @throws IllegalArgumentException if <code>array</code> is <code>null</code>
- * @throws IllegalArgumentException if <code>array</code> is empty
- * @since 3.4 Changed signature from min(int[]) to min(int...)
- */
- public static int min(final int... array) {
- // Validates input
- validateArray(array);
-
- // Finds and returns min
- int min = array[0];
- for (int j = 1; j < array.length; j++) {
- if (array[j] < min) {
- min = array[j];
- }
- }
-
- return min;
- }
-
- /**
- * <p>Returns the minimum value in an array.</p>
- *
- * @param array an array, must not be null or empty
- * @return the minimum value in the array
- * @throws IllegalArgumentException if <code>array</code> is <code>null</code>
- * @throws IllegalArgumentException if <code>array</code> is empty
- * @since 3.4 Changed signature from min(short[]) to min(short...)
- */
- public static short min(final short... array) {
- // Validates input
- validateArray(array);
-
- // Finds and returns min
- short min = array[0];
- for (int i = 1; i < array.length; i++) {
- if (array[i] < min) {
- min = array[i];
- }
- }
-
- return min;
- }
-
- /**
- * <p>Returns the minimum value in an array.</p>
- *
- * @param array an array, must not be null or empty
- * @return the minimum value in the array
- * @throws IllegalArgumentException if <code>array</code> is <code>null</code>
- * @throws IllegalArgumentException if <code>array</code> is empty
- * @since 3.4 Changed signature from min(byte[]) to min(byte...)
- */
- public static byte min(final byte... array) {
- // Validates input
- validateArray(array);
-
- // Finds and returns min
- byte min = array[0];
- for (int i = 1; i < array.length; i++) {
- if (array[i] < min) {
- min = array[i];
- }
- }
-
- return min;
- }
-
- /**
- * <p>Returns the minimum value in an array.</p>
- *
- * @param array an array, must not be null or empty
- * @return the minimum value in the array
- * @throws IllegalArgumentException if <code>array</code> is <code>null</code>
- * @throws IllegalArgumentException if <code>array</code> is empty
- * @see IEEE754rUtils#min(double[]) IEEE754rUtils for a version of this method that handles NaN differently
- * @since 3.4 Changed signature from min(double[]) to min(double...)
- */
- public static double min(final double... array) {
- // Validates input
- validateArray(array);
-
- // Finds and returns min
- double min = array[0];
- for (int i = 1; i < array.length; i++) {
- if (Double.isNaN(array[i])) {
- return Double.NaN;
- }
- if (array[i] < min) {
- min = array[i];
- }
- }
-
- return min;
- }
-
- /**
- * <p>Returns the minimum value in an array.</p>
- *
- * @param array an array, must not be null or empty
- * @return the minimum value in the array
- * @throws IllegalArgumentException if <code>array</code> is <code>null</code>
- * @throws IllegalArgumentException if <code>array</code> is empty
- * @see IEEE754rUtils#min(float[]) IEEE754rUtils for a version of this method that handles NaN differently
- * @since 3.4 Changed signature from min(float[]) to min(float...)
- */
- public static float min(final float... array) {
- // Validates input
- validateArray(array);
-
- // Finds and returns min
- float min = array[0];
- for (int i = 1; i < array.length; i++) {
- if (Float.isNaN(array[i])) {
- return Float.NaN;
- }
- if (array[i] < min) {
- min = array[i];
- }
- }
-
- return min;
- }
-
- // Max in array
- //--------------------------------------------------------------------
- /**
- * <p>Returns the maximum value in an array.</p>
- *
- * @param array an array, must not be null or empty
- * @return the maximum value in the array
- * @throws IllegalArgumentException if <code>array</code> is <code>null</code>
- * @throws IllegalArgumentException if <code>array</code> is empty
- * @since 3.4 Changed signature from max(long[]) to max(long...)
- */
- public static long max(final long... array) {
- // Validates input
- validateArray(array);
-
- // Finds and returns max
- long max = array[0];
- for (int j = 1; j < array.length; j++) {
- if (array[j] > max) {
- max = array[j];
- }
- }
-
- return max;
- }
-
- /**
- * <p>Returns the maximum value in an array.</p>
- *
- * @param array an array, must not be null or empty
- * @return the maximum value in the array
- * @throws IllegalArgumentException if <code>array</code> is <code>null</code>
- * @throws IllegalArgumentException if <code>array</code> is empty
- * @since 3.4 Changed signature from max(int[]) to max(int...)
- */
- public static int max(final int... array) {
- // Validates input
- validateArray(array);
-
- // Finds and returns max
- int max = array[0];
- for (int j = 1; j < array.length; j++) {
- if (array[j] > max) {
- max = array[j];
- }
- }
-
- return max;
- }
-
- /**
- * <p>Returns the maximum value in an array.</p>
- *
- * @param array an array, must not be null or empty
- * @return the maximum value in the array
- * @throws IllegalArgumentException if <code>array</code> is <code>null</code>
- * @throws IllegalArgumentException if <code>array</code> is empty
- * @since 3.4 Changed signature from max(short[]) to max(short...)
- */
- public static short max(final short... array) {
- // Validates input
- validateArray(array);
-
- // Finds and returns max
- short max = array[0];
- for (int i = 1; i < array.length; i++) {
- if (array[i] > max) {
- max = array[i];
- }
- }
-
- return max;
- }
-
- /**
- * <p>Returns the maximum value in an array.</p>
- *
- * @param array an array, must not be null or empty
- * @return the maximum value in the array
- * @throws IllegalArgumentException if <code>array</code> is <code>null</code>
- * @throws IllegalArgumentException if <code>array</code> is empty
- * @since 3.4 Changed signature from max(byte[]) to max(byte...)
- */
- public static byte max(final byte... array) {
- // Validates input
- validateArray(array);
-
- // Finds and returns max
- byte max = array[0];
- for (int i = 1; i < array.length; i++) {
- if (array[i] > max) {
- max = array[i];
- }
- }
-
- return max;
- }
-
- /**
- * <p>Returns the maximum value in an array.</p>
- *
- * @param array an array, must not be null or empty
- * @return the maximum value in the array
- * @throws IllegalArgumentException if <code>array</code> is <code>null</code>
- * @throws IllegalArgumentException if <code>array</code> is empty
- * @see IEEE754rUtils#max(double[]) IEEE754rUtils for a version of this method that handles NaN differently
- * @since 3.4 Changed signature from max(double[]) to max(double...)
- */
- public static double max(final double... array) {
- // Validates input
- validateArray(array);
-
- // Finds and returns max
- double max = array[0];
- for (int j = 1; j < array.length; j++) {
- if (Double.isNaN(array[j])) {
- return Double.NaN;
- }
- if (array[j] > max) {
- max = array[j];
- }
- }
-
- return max;
- }
-
- /**
- * <p>Returns the maximum value in an array.</p>
- *
- * @param array an array, must not be null or empty
- * @return the maximum value in the array
- * @throws IllegalArgumentException if <code>array</code> is <code>null</code>
- * @throws IllegalArgumentException if <code>array</code> is empty
- * @see IEEE754rUtils#max(float[]) IEEE754rUtils for a version of this method that handles NaN differently
- * @since 3.4 Changed signature from max(float[]) to max(float...)
- */
- public static float max(final float... array) {
- // Validates input
- validateArray(array);
-
- // Finds and returns max
- float max = array[0];
- for (int j = 1; j < array.length; j++) {
- if (Float.isNaN(array[j])) {
- return Float.NaN;
- }
- if (array[j] > max) {
- max = array[j];
- }
- }
-
- return max;
- }
-
- /**
- * Checks if the specified array is neither null nor empty.
- *
- * @param array the array to check
- * @throws IllegalArgumentException if {@code array} is either {@code null} or empty
- */
- private static void validateArray(final Object array) {
- if (array == null) {
- throw new IllegalArgumentException("The Array must not be null");
- }
- Validate.isTrue(Array.getLength(array) != 0, "Array cannot be empty.");
- }
-
- // 3 param min
- //-----------------------------------------------------------------------
- /**
- * <p>Gets the minimum of three <code>long</code> values.</p>
- *
- * @param a value 1
- * @param b value 2
- * @param c value 3
- * @return the smallest of the values
- */
- public static long min(long a, final long b, final long c) {
- if (b < a) {
- a = b;
- }
- if (c < a) {
- a = c;
- }
- return a;
- }
-
- /**
- * <p>Gets the minimum of three <code>int</code> values.</p>
- *
- * @param a value 1
- * @param b value 2
- * @param c value 3
- * @return the smallest of the values
- */
- public static int min(int a, final int b, final int c) {
- if (b < a) {
- a = b;
- }
- if (c < a) {
- a = c;
- }
- return a;
- }
-
- /**
- * <p>Gets the minimum of three <code>short</code> values.</p>
- *
- * @param a value 1
- * @param b value 2
- * @param c value 3
- * @return the smallest of the values
- */
- public static short min(short a, final short b, final short c) {
- if (b < a) {
- a = b;
- }
- if (c < a) {
- a = c;
- }
- return a;
- }
-
- /**
- * <p>Gets the minimum of three <code>byte</code> values.</p>
- *
- * @param a value 1
- * @param b value 2
- * @param c value 3
- * @return the smallest of the values
- */
- public static byte min(byte a, final byte b, final byte c) {
- if (b < a) {
- a = b;
- }
- if (c < a) {
- a = c;
- }
- return a;
- }
-
- /**
- * <p>Gets the minimum of three <code>double</code> values.</p>
- *
- * <p>If any value is <code>NaN</code>, <code>NaN</code> is
- * returned. Infinity is handled.</p>
- *
- * @param a value 1
- * @param b value 2
- * @param c value 3
- * @return the smallest of the values
- * @see IEEE754rUtils#min(double, double, double) for a version of this method that handles NaN differently
- */
- public static double min(final double a, final double b, final double c) {
- return Math.min(Math.min(a, b), c);
- }
-
- /**
- * <p>Gets the minimum of three <code>float</code> values.</p>
- *
- * <p>If any value is <code>NaN</code>, <code>NaN</code> is
- * returned. Infinity is handled.</p>
- *
- * @param a value 1
- * @param b value 2
- * @param c value 3
- * @return the smallest of the values
- * @see IEEE754rUtils#min(float, float, float) for a version of this method that handles NaN differently
- */
- public static float min(final float a, final float b, final float c) {
- return Math.min(Math.min(a, b), c);
- }
-
- // 3 param max
- //-----------------------------------------------------------------------
- /**
- * <p>Gets the maximum of three <code>long</code> values.</p>
- *
- * @param a value 1
- * @param b value 2
- * @param c value 3
- * @return the largest of the values
- */
- public static long max(long a, final long b, final long c) {
- if (b > a) {
- a = b;
- }
- if (c > a) {
- a = c;
- }
- return a;
- }
-
- /**
- * <p>Gets the maximum of three <code>int</code> values.</p>
- *
- * @param a value 1
- * @param b value 2
- * @param c value 3
- * @return the largest of the values
- */
- public static int max(int a, final int b, final int c) {
- if (b > a) {
- a = b;
- }
- if (c > a) {
- a = c;
- }
- return a;
- }
-
- /**
- * <p>Gets the maximum of three <code>short</code> values.</p>
- *
- * @param a value 1
- * @param b value 2
- * @param c value 3
- * @return the largest of the values
- */
- public static short max(short a, final short b, final short c) {
- if (b > a) {
- a = b;
- }
- if (c > a) {
- a = c;
- }
- return a;
- }
-
- /**
- * <p>Gets the maximum of three <code>byte</code> values.</p>
- *
- * @param a value 1
- * @param b value 2
- * @param c value 3
- * @return the largest of the values
- */
- public static byte max(byte a, final byte b, final byte c) {
- if (b > a) {
- a = b;
- }
- if (c > a) {
- a = c;
- }
- return a;
- }
-
- /**
- * <p>Gets the maximum of three <code>double</code> values.</p>
- *
- * <p>If any value is <code>NaN</code>, <code>NaN</code> is
- * returned. Infinity is handled.</p>
- *
- * @param a value 1
- * @param b value 2
- * @param c value 3
- * @return the largest of the values
- * @see IEEE754rUtils#max(double, double, double) for a version of this method that handles NaN differently
- */
- public static double max(final double a, final double b, final double c) {
- return Math.max(Math.max(a, b), c);
- }
-
- /**
- * <p>Gets the maximum of three <code>float</code> values.</p>
- *
- * <p>If any value is <code>NaN</code>, <code>NaN</code> is
- * returned. Infinity is handled.</p>
- *
- * @param a value 1
- * @param b value 2
- * @param c value 3
- * @return the largest of the values
- * @see IEEE754rUtils#max(float, float, float) for a version of this method that handles NaN differently
- */
- public static float max(final float a, final float b, final float c) {
- return Math.max(Math.max(a, b), c);
- }
-
- //-----------------------------------------------------------------------
- /**
- * <p>Checks whether the <code>String</code> contains only
- * digit characters.</p>
- *
- * <p><code>Null</code> and empty String will return
- * <code>false</code>.</p>
- *
- * @param str the <code>String</code> to check
- * @return <code>true</code> if str contains only Unicode numeric
- */
- public static boolean isDigits(final String str) {
- return StringUtils.isNumeric(str);
- }
-
- /**
- * <p>Checks whether the String a valid Java number.</p>
- *
- * <p>Valid numbers include hexadecimal marked with the <code>0x</code> or
- * <code>0X</code> qualifier, octal numbers, scientific notation and numbers
- * marked with a type qualifier (e.g. 123L).</p>
- *
- * <p>Non-hexadecimal strings beginning with a leading zero are
- * treated as octal values. Thus the string <code>09</code> will return
- * <code>false</code>, since <code>9</code> is not a valid octal value.
- * However, numbers beginning with {@code 0.} are treated as decimal.</p>
- *
- * <p><code>null</code> and empty/blank {@code String} will return
- * <code>false</code>.</p>
- *
- * @param str the <code>String</code> to check
- * @return <code>true</code> if the string is a correctly formatted number
- * @since 3.3 the code supports hex {@code 0Xhhh} and octal {@code 0ddd} validation
- */
- public static boolean isNumber(final String str) {
- if (StringUtils.isEmpty(str)) {
- return false;
- }
- final char[] chars = str.toCharArray();
- int sz = chars.length;
- boolean hasExp = false;
- boolean hasDecPoint = false;
- boolean allowSigns = false;
- boolean foundDigit = false;
- // deal with any possible sign up front
- final int start = (chars[0] == '-') ? 1 : 0;
- if (sz > start + 1 && chars[start] == '0') { // leading 0
- if (
- (chars[start + 1] == 'x') ||
- (chars[start + 1] == 'X')
- ) { // leading 0x/0X
- int i = start + 2;
- if (i == sz) {
- return false; // str == "0x"
- }
- // checking hex (it can't be anything else)
- for (; i < chars.length; i++) {
- if ((chars[i] < '0' || chars[i] > '9')
- && (chars[i] < 'a' || chars[i] > 'f')
- && (chars[i] < 'A' || chars[i] > 'F')) {
- return false;
- }
- }
- return true;
- } else if (Character.isDigit(chars[start + 1])) {
- // leading 0, but not hex, must be octal
- int i = start + 1;
- for (; i < chars.length; i++) {
- if (chars[i] < '0' || chars[i] > '7') {
- return false;
- }
- }
- return true;
- }
- }
- sz--; // don't want to loop to the last char, check it afterwords
- // for type qualifiers
- int i = start;
- // loop to the next to last char or to the last char if we need another digit to
- // make a valid number (e.g. chars[0..5] = "1234E")
- while (i < sz || (i < sz + 1 && allowSigns && !foundDigit)) {
- if (chars[i] >= '0' && chars[i] <= '9') {
- foundDigit = true;
- allowSigns = false;
-
- } else if (chars[i] == '.') {
- if (hasDecPoint || hasExp) {
- // two decimal points or dec in exponent
- return false;
- }
- hasDecPoint = true;
- } else if (chars[i] == 'e' || chars[i] == 'E') {
- // we've already taken care of hex.
- if (hasExp) {
- // two E's
- return false;
- }
- if (!foundDigit) {
- return false;
- }
- hasExp = true;
- allowSigns = true;
- } else if (chars[i] == '+' || chars[i] == '-') {
- if (!allowSigns) {
- return false;
- }
- allowSigns = false;
- foundDigit = false; // we need a digit after the E
- } else {
- return false;
- }
- i++;
- }
- if (i < chars.length) {
- if (chars[i] >= '0' && chars[i] <= '9') {
- // no type qualifier, OK
- return true;
- }
- if (chars[i] == 'e' || chars[i] == 'E') {
- // can't have an E at the last byte
- return false;
- }
- if (chars[i] == '.') {
- if (hasDecPoint || hasExp) {
- // two decimal points or dec in exponent
- return false;
- }
- // single trailing decimal point after non-exponent is ok
- return foundDigit;
- }
- if (!allowSigns
- && (chars[i] == 'd'
- || chars[i] == 'D'
- || chars[i] == 'f'
- || chars[i] == 'F')) {
- return foundDigit;
- }
- if (chars[i] == 'l'
- || chars[i] == 'L') {
- // not allowing L with an exponent or decimal point
- return foundDigit && !hasExp && !hasDecPoint;
- }
- // last character is illegal
- return false;
- }
- // allowSigns is true iff the val ends in 'E'
- // found digit it to make sure weird stuff like '.' and '1E-' doesn't pass
- return !allowSigns && foundDigit;
- }
-
- /**
- * <p>Checks whether the given String is a parsable number.</p>
- *
- * <p>Parsable numbers include those Strings understood by {@link Integer#parseInt(String)},
- * {@link Long#parseLong(String)}, {@link Float#parseFloat(String)} or
- * {@link Double#parseDouble(String)}. This method can be used instead of catching {@link java.text.ParseException}
- * when calling one of those methods.</p>
- *
- * <p>Hexadecimal and scientific notations are <strong>not</strong> considered parsable.
- * See {@link #isNumber(String)} on those cases.</p>
- *
- * <p>{@code Null} and empty String will return <code>false</code>.</p>
- *
- * @param str the String to check.
- * @return {@code true} if the string is a parsable number.
- * @since 3.4
- */
- public static boolean isParsable(final String str) {
- if( StringUtils.endsWith( str, "." ) ) {
- return false;
- }
- if( StringUtils.startsWith( str, "-" ) ) {
- return isDigits( StringUtils.replaceOnce( str.substring(1), ".", StringUtils.EMPTY ) );
- } else {
- return isDigits( StringUtils.replaceOnce( str, ".", StringUtils.EMPTY ) );
- }
- }
-
- /**
- * <p>Compares two {@code int} values numerically. This is the same functionality as provided in Java 7.</p>
- *
- * @param x the first {@code int} to compare
- * @param y the second {@code int} to compare
- * @return the value {@code 0} if {@code x == y};
- * a value less than {@code 0} if {@code x < y}; and
- * a value greater than {@code 0} if {@code x > y}
- * @since 3.4
- */
- public static int compare(int x, int y) {
- if (x == y) {
- return 0;
- }
- if (x < y) {
- return -1;
- } else {
- return 1;
- }
- }
-
- /**
- * <p>Compares to {@code long} values numerically. This is the same functionality as provided in Java 7.</p>
- *
- * @param x the first {@code long} to compare
- * @param y the second {@code long} to compare
- * @return the value {@code 0} if {@code x == y};
- * a value less than {@code 0} if {@code x < y}; and
- * a value greater than {@code 0} if {@code x > y}
- * @since 3.4
- */
- public static int compare(long x, long y) {
- if (x == y) {
- return 0;
- }
- if (x < y) {
- return -1;
- } else {
- return 1;
- }
- }
-
- /**
- * <p>Compares to {@code short} values numerically. This is the same functionality as provided in Java 7.</p>
- *
- * @param x the first {@code short} to compare
- * @param y the second {@code short} to compare
- * @return the value {@code 0} if {@code x == y};
- * a value less than {@code 0} if {@code x < y}; and
- * a value greater than {@code 0} if {@code x > y}
- * @since 3.4
- */
- public static int compare(short x, short y) {
- if (x == y) {
- return 0;
- }
- if (x < y) {
- return -1;
- } else {
- return 1;
- }
- }
-
- /**
- * <p>Compares two {@code byte} values numerically. This is the same functionality as provided in Java 7.</p>
- *
- * @param x the first {@code byte} to compare
- * @param y the second {@code byte} to compare
- * @return the value {@code 0} if {@code x == y};
- * a value less than {@code 0} if {@code x < y}; and
- * a value greater than {@code 0} if {@code x > y}
- * @since 3.4
- */
- public static int compare(byte x, byte y) {
- return x-y;
- }
-}
+/*
+ * 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.commons.lang3.math;
+
+import java.lang.reflect.Array;
+import java.math.BigDecimal;
+import java.math.BigInteger;
+
+import org.apache.commons.lang3.StringUtils;
+import org.apache.commons.lang3.Validate;
+
+/**
+ * <p>Provides extra functionality for Java Number classes.</p>
+ *
+ * @since 2.0
+ */
+public class NumberUtils {
+
+ /** Reusable Long constant for zero. */
+ public static final Long LONG_ZERO = Long.valueOf(0L);
+ /** Reusable Long constant for one. */
+ public static final Long LONG_ONE = Long.valueOf(1L);
+ /** Reusable Long constant for minus one. */
+ public static final Long LONG_MINUS_ONE = Long.valueOf(-1L);
+ /** Reusable Integer constant for zero. */
+ public static final Integer INTEGER_ZERO = Integer.valueOf(0);
+ /** Reusable Integer constant for one. */
+ public static final Integer INTEGER_ONE = Integer.valueOf(1);
+ /** Reusable Integer constant for minus one. */
+ public static final Integer INTEGER_MINUS_ONE = Integer.valueOf(-1);
+ /** Reusable Short constant for zero. */
+ public static final Short SHORT_ZERO = Short.valueOf((short) 0);
+ /** Reusable Short constant for one. */
+ public static final Short SHORT_ONE = Short.valueOf((short) 1);
+ /** Reusable Short constant for minus one. */
+ public static final Short SHORT_MINUS_ONE = Short.valueOf((short) -1);
+ /** Reusable Byte constant for zero. */
+ public static final Byte BYTE_ZERO = Byte.valueOf((byte) 0);
+ /** Reusable Byte constant for one. */
+ public static final Byte BYTE_ONE = Byte.valueOf((byte) 1);
+ /** Reusable Byte constant for minus one. */
+ public static final Byte BYTE_MINUS_ONE = Byte.valueOf((byte) -1);
+ /** Reusable Double constant for zero. */
+ public static final Double DOUBLE_ZERO = Double.valueOf(0.0d);
+ /** Reusable Double constant for one. */
+ public static final Double DOUBLE_ONE = Double.valueOf(1.0d);
+ /** Reusable Double constant for minus one. */
+ public static final Double DOUBLE_MINUS_ONE = Double.valueOf(-1.0d);
+ /** Reusable Float constant for zero. */
+ public static final Float FLOAT_ZERO = Float.valueOf(0.0f);
+ /** Reusable Float constant for one. */
+ public static final Float FLOAT_ONE = Float.valueOf(1.0f);
+ /** Reusable Float constant for minus one. */
+ public static final Float FLOAT_MINUS_ONE = Float.valueOf(-1.0f);
+
+ /**
+ * <p><code>NumberUtils</code> instances should NOT be constructed in standard programming.
+ * Instead, the class should be used as <code>NumberUtils.toInt("6");</code>.</p>
+ *
+ * <p>This constructor is public to permit tools that require a JavaBean instance
+ * to operate.</p>
+ */
+ public NumberUtils() {
+ super();
+ }
+
+ //-----------------------------------------------------------------------
+ /**
+ * <p>Convert a <code>String</code> to an <code>int</code>, returning
+ * <code>zero</code> if the conversion fails.</p>
+ *
+ * <p>If the string is <code>null</code>, <code>zero</code> is returned.</p>
+ *
+ * <pre>
+ * NumberUtils.toInt(null) = 0
+ * NumberUtils.toInt("") = 0
+ * NumberUtils.toInt("1") = 1
+ * </pre>
+ *
+ * @param str the string to convert, may be null
+ * @return the int represented by the string, or <code>zero</code> if
+ * conversion fails
+ * @since 2.1
+ */
+ public static int toInt(final String str) {
+ return toInt(str, 0);
+ }
+
+ /**
+ * <p>Convert a <code>String</code> to an <code>int</code>, returning a
+ * default value if the conversion fails.</p>
+ *
+ * <p>If the string is <code>null</code>, the default value is returned.</p>
+ *
+ * <pre>
+ * NumberUtils.toInt(null, 1) = 1
+ * NumberUtils.toInt("", 1) = 1
+ * NumberUtils.toInt("1", 0) = 1
+ * </pre>
+ *
+ * @param str the string to convert, may be null
+ * @param defaultValue the default value
+ * @return the int represented by the string, or the default if conversion fails
+ * @since 2.1
+ */
+ public static int toInt(final String str, final int defaultValue) {
+ if(str == null) {
+ return defaultValue;
+ }
+ try {
+ return Integer.parseInt(str);
+ } catch (final NumberFormatException nfe) {
+ return defaultValue;
+ }
+ }
+
+ /**
+ * <p>Convert a <code>String</code> to a <code>long</code>, returning
+ * <code>zero</code> if the conversion fails.</p>
+ *
+ * <p>If the string is <code>null</code>, <code>zero</code> is returned.</p>
+ *
+ * <pre>
+ * NumberUtils.toLong(null) = 0L
+ * NumberUtils.toLong("") = 0L
+ * NumberUtils.toLong("1") = 1L
+ * </pre>
+ *
+ * @param str the string to convert, may be null
+ * @return the long represented by the string, or <code>0</code> if
+ * conversion fails
+ * @since 2.1
+ */
+ public static long toLong(final String str) {
+ return toLong(str, 0L);
+ }
+
+ /**
+ * <p>Convert a <code>String</code> to a <code>long</code>, returning a
+ * default value if the conversion fails.</p>
+ *
+ * <p>If the string is <code>null</code>, the default value is returned.</p>
+ *
+ * <pre>
+ * NumberUtils.toLong(null, 1L) = 1L
+ * NumberUtils.toLong("", 1L) = 1L
+ * NumberUtils.toLong("1", 0L) = 1L
+ * </pre>
+ *
+ * @param str the string to convert, may be null
+ * @param defaultValue the default value
+ * @return the long represented by the string, or the default if conversion fails
+ * @since 2.1
+ */
+ public static long toLong(final String str, final long defaultValue) {
+ if (str == null) {
+ return defaultValue;
+ }
+ try {
+ return Long.parseLong(str);
+ } catch (final NumberFormatException nfe) {
+ return defaultValue;
+ }
+ }
+
+ /**
+ * <p>Convert a <code>String</code> to a <code>float</code>, returning
+ * <code>0.0f</code> if the conversion fails.</p>
+ *
+ * <p>If the string <code>str</code> is <code>null</code>,
+ * <code>0.0f</code> is returned.</p>
+ *
+ * <pre>
+ * NumberUtils.toFloat(null) = 0.0f
+ * NumberUtils.toFloat("") = 0.0f
+ * NumberUtils.toFloat("1.5") = 1.5f
+ * </pre>
+ *
+ * @param str the string to convert, may be <code>null</code>
+ * @return the float represented by the string, or <code>0.0f</code>
+ * if conversion fails
+ * @since 2.1
+ */
+ public static float toFloat(final String str) {
+ return toFloat(str, 0.0f);
+ }
+
+ /**
+ * <p>Convert a <code>String</code> to a <code>float</code>, returning a
+ * default value if the conversion fails.</p>
+ *
+ * <p>If the string <code>str</code> is <code>null</code>, the default
+ * value is returned.</p>
+ *
+ * <pre>
+ * NumberUtils.toFloat(null, 1.1f) = 1.0f
+ * NumberUtils.toFloat("", 1.1f) = 1.1f
+ * NumberUtils.toFloat("1.5", 0.0f) = 1.5f
+ * </pre>
+ *
+ * @param str the string to convert, may be <code>null</code>
+ * @param defaultValue the default value
+ * @return the float represented by the string, or defaultValue
+ * if conversion fails
+ * @since 2.1
+ */
+ public static float toFloat(final String str, final float defaultValue) {
+ if (str == null) {
+ return defaultValue;
+ }
+ try {
+ return Float.parseFloat(str);
+ } catch (final NumberFormatException nfe) {
+ return defaultValue;
+ }
+ }
+
+ /**
+ * <p>Convert a <code>String</code> to a <code>double</code>, returning
+ * <code>0.0d</code> if the conversion fails.</p>
+ *
+ * <p>If the string <code>str</code> is <code>null</code>,
+ * <code>0.0d</code> is returned.</p>
+ *
+ * <pre>
+ * NumberUtils.toDouble(null) = 0.0d
+ * NumberUtils.toDouble("") = 0.0d
+ * NumberUtils.toDouble("1.5") = 1.5d
+ * </pre>
+ *
+ * @param str the string to convert, may be <code>null</code>
+ * @return the double represented by the string, or <code>0.0d</code>
+ * if conversion fails
+ * @since 2.1
+ */
+ public static double toDouble(final String str) {
+ return toDouble(str, 0.0d);
+ }
+
+ /**
+ * <p>Convert a <code>String</code> to a <code>double</code>, returning a
+ * default value if the conversion fails.</p>
+ *
+ * <p>If the string <code>str</code> is <code>null</code>, the default
+ * value is returned.</p>
+ *
+ * <pre>
+ * NumberUtils.toDouble(null, 1.1d) = 1.1d
+ * NumberUtils.toDouble("", 1.1d) = 1.1d
+ * NumberUtils.toDouble("1.5", 0.0d) = 1.5d
+ * </pre>
+ *
+ * @param str the string to convert, may be <code>null</code>
+ * @param defaultValue the default value
+ * @return the double represented by the string, or defaultValue
+ * if conversion fails
+ * @since 2.1
+ */
+ public static double toDouble(final String str, final double defaultValue) {
+ if (str == null) {
+ return defaultValue;
+ }
+ try {
+ return Double.parseDouble(str);
+ } catch (final NumberFormatException nfe) {
+ return defaultValue;
+ }
+ }
+
+ //-----------------------------------------------------------------------
+ /**
+ * <p>Convert a <code>String</code> to a <code>byte</code>, returning
+ * <code>zero</code> if the conversion fails.</p>
+ *
+ * <p>If the string is <code>null</code>, <code>zero</code> is returned.</p>
+ *
+ * <pre>
+ * NumberUtils.toByte(null) = 0
+ * NumberUtils.toByte("") = 0
+ * NumberUtils.toByte("1") = 1
+ * </pre>
+ *
+ * @param str the string to convert, may be null
+ * @return the byte represented by the string, or <code>zero</code> if
+ * conversion fails
+ * @since 2.5
+ */
+ public static byte toByte(final String str) {
+ return toByte(str, (byte) 0);
+ }
+
+ /**
+ * <p>Convert a <code>String</code> to a <code>byte</code>, returning a
+ * default value if the conversion fails.</p>
+ *
+ * <p>If the string is <code>null</code>, the default value is returned.</p>
+ *
+ * <pre>
+ * NumberUtils.toByte(null, 1) = 1
+ * NumberUtils.toByte("", 1) = 1
+ * NumberUtils.toByte("1", 0) = 1
+ * </pre>
+ *
+ * @param str the string to convert, may be null
+ * @param defaultValue the default value
+ * @return the byte represented by the string, or the default if conversion fails
+ * @since 2.5
+ */
+ public static byte toByte(final String str, final byte defaultValue) {
+ if(str == null) {
+ return defaultValue;
+ }
+ try {
+ return Byte.parseByte(str);
+ } catch (final NumberFormatException nfe) {
+ return defaultValue;
+ }
+ }
+
+ /**
+ * <p>Convert a <code>String</code> to a <code>short</code>, returning
+ * <code>zero</code> if the conversion fails.</p>
+ *
+ * <p>If the string is <code>null</code>, <code>zero</code> is returned.</p>
+ *
+ * <pre>
+ * NumberUtils.toShort(null) = 0
+ * NumberUtils.toShort("") = 0
+ * NumberUtils.toShort("1") = 1
+ * </pre>
+ *
+ * @param str the string to convert, may be null
+ * @return the short represented by the string, or <code>zero</code> if
+ * conversion fails
+ * @since 2.5
+ */
+ public static short toShort(final String str) {
+ return toShort(str, (short) 0);
+ }
+
+ /**
+ * <p>Convert a <code>String</code> to an <code>short</code>, returning a
+ * default value if the conversion fails.</p>
+ *
+ * <p>If the string is <code>null</code>, the default value is returned.</p>
+ *
+ * <pre>
+ * NumberUtils.toShort(null, 1) = 1
+ * NumberUtils.toShort("", 1) = 1
+ * NumberUtils.toShort("1", 0) = 1
+ * </pre>
+ *
+ * @param str the string to convert, may be null
+ * @param defaultValue the default value
+ * @return the short represented by the string, or the default if conversion fails
+ * @since 2.5
+ */
+ public static short toShort(final String str, final short defaultValue) {
+ if(str == null) {
+ return defaultValue;
+ }
+ try {
+ return Short.parseShort(str);
+ } catch (final NumberFormatException nfe) {
+ return defaultValue;
+ }
+ }
+
+ //-----------------------------------------------------------------------
+ // must handle Long, Float, Integer, Float, Short,
+ // BigDecimal, BigInteger and Byte
+ // useful methods:
+ // Byte.decode(String)
+ // Byte.valueOf(String,int radix)
+ // Byte.valueOf(String)
+ // Double.valueOf(String)
+ // Float.valueOf(String)
+ // Float.valueOf(String)
+ // Integer.valueOf(String,int radix)
+ // Integer.valueOf(String)
+ // Integer.decode(String)
+ // Integer.getInteger(String)
+ // Integer.getInteger(String,int val)
+ // Integer.getInteger(String,Integer val)
+ // Integer.valueOf(String)
+ // Double.valueOf(String)
+ // new Byte(String)
+ // Long.valueOf(String)
+ // Long.getLong(String)
+ // Long.getLong(String,int)
+ // Long.getLong(String,Integer)
+ // Long.valueOf(String,int)
+ // Long.valueOf(String)
+ // Short.valueOf(String)
+ // Short.decode(String)
+ // Short.valueOf(String,int)
+ // Short.valueOf(String)
+ // new BigDecimal(String)
+ // new BigInteger(String)
+ // new BigInteger(String,int radix)
+ // Possible inputs:
+ // 45 45.5 45E7 4.5E7 Hex Oct Binary xxxF xxxD xxxf xxxd
+ // plus minus everything. Prolly more. A lot are not separable.
+
+ /**
+ * <p>Turns a string value into a java.lang.Number.</p>
+ *
+ * <p>If the string starts with {@code 0x} or {@code -0x} (lower or upper case) or {@code #} or {@code -#}, it
+ * will be interpreted as a hexadecimal Integer - or Long, if the number of digits after the
+ * prefix is more than 8 - or BigInteger if there are more than 16 digits.
+ * </p>
+ * <p>Then, the value is examined for a type qualifier on the end, i.e. one of
+ * <code>'f','F','d','D','l','L'</code>. If it is found, it starts
+ * trying to create successively larger types from the type specified
+ * until one is found that can represent the value.</p>
+ *
+ * <p>If a type specifier is not found, it will check for a decimal point
+ * and then try successively larger types from <code>Integer</code> to
+ * <code>BigInteger</code> and from <code>Float</code> to
+ * <code>BigDecimal</code>.</p>
+ *
+ * <p>
+ * Integral values with a leading {@code 0} will be interpreted as octal; the returned number will
+ * be Integer, Long or BigDecimal as appropriate.
+ * </p>
+ *
+ * <p>Returns <code>null</code> if the string is <code>null</code>.</p>
+ *
+ * <p>This method does not trim the input string, i.e., strings with leading
+ * or trailing spaces will generate NumberFormatExceptions.</p>
+ *
+ * @param str String containing a number, may be null
+ * @return Number created from the string (or null if the input is null)
+ * @throws NumberFormatException if the value cannot be converted
+ */
+ public static Number createNumber(final String str) throws NumberFormatException {
+ if (str == null) {
+ return null;
+ }
+ if (StringUtils.isBlank(str)) {
+ throw new NumberFormatException("A blank string is not a valid number");
+ }
+ // Need to deal with all possible hex prefixes here
+ final String[] hex_prefixes = {"0x", "0X", "-0x", "-0X", "#", "-#"};
+ int pfxLen = 0;
+ for(final String pfx : hex_prefixes) {
+ if (str.startsWith(pfx)) {
+ pfxLen += pfx.length();
+ break;
+ }
+ }
+ if (pfxLen > 0) { // we have a hex number
+ char firstSigDigit = 0; // strip leading zeroes
+ for(int i = pfxLen; i < str.length(); i++) {
+ firstSigDigit = str.charAt(i);
+ if (firstSigDigit == '0') { // count leading zeroes
+ pfxLen++;
+ } else {
+ break;
+ }
+ }
+ final int hexDigits = str.length() - pfxLen;
+ if (hexDigits > 16 || (hexDigits == 16 && firstSigDigit > '7')) { // too many for Long
+ return createBigInteger(str);
+ }
+ if (hexDigits > 8 || (hexDigits == 8 && firstSigDigit > '7')) { // too many for an int
+ return createLong(str);
+ }
+ return createInteger(str);
+ }
+ final char lastChar = str.charAt(str.length() - 1);
+ String mant;
+ String dec;
+ String exp;
+ final int decPos = str.indexOf('.');
+ final int expPos = str.indexOf('e') + str.indexOf('E') + 1; // assumes both not present
+ // if both e and E are present, this is caught by the checks on expPos (which prevent IOOBE)
+ // and the parsing which will detect if e or E appear in a number due to using the wrong offset
+
+ int numDecimals = 0; // Check required precision (LANG-693)
+ if (decPos > -1) { // there is a decimal point
+
+ if (expPos > -1) { // there is an exponent
+ if (expPos < decPos || expPos > str.length()) { // prevents double exponent causing IOOBE
+ throw new NumberFormatException(str + " is not a valid number.");
+ }
+ dec = str.substring(decPos + 1, expPos);
+ } else {
+ dec = str.substring(decPos + 1);
+ }
+ mant = getMantissa(str, decPos);
+ numDecimals = dec.length(); // gets number of digits past the decimal to ensure no loss of precision for floating point numbers.
+ } else {
+ if (expPos > -1) {
+ if (expPos > str.length()) { // prevents double exponent causing IOOBE
+ throw new NumberFormatException(str + " is not a valid number.");
+ }
+ mant = getMantissa(str, expPos);
+ } else {
+ mant = getMantissa(str);
+ }
+ dec = null;
+ }
+ if (!Character.isDigit(lastChar) && lastChar != '.') {
+ if (expPos > -1 && expPos < str.length() - 1) {
+ exp = str.substring(expPos + 1, str.length() - 1);
+ } else {
+ exp = null;
+ }
+ //Requesting a specific type..
+ final String numeric = str.substring(0, str.length() - 1);
+ final boolean allZeros = isAllZeros(mant) && isAllZeros(exp);
+ switch (lastChar) {
+ case 'l' :
+ case 'L' :
+ if (dec == null
+ && exp == null
+ && (numeric.charAt(0) == '-' && isDigits(numeric.substring(1)) || isDigits(numeric))) {
+ try {
+ return createLong(numeric);
+ } catch (final NumberFormatException nfe) { // NOPMD
+ // Too big for a long
+ }
+ return createBigInteger(numeric);
+
+ }
+ throw new NumberFormatException(str + " is not a valid number.");
+ case 'f' :
+ case 'F' :
+ try {
+ final Float f = NumberUtils.createFloat(numeric);
+ if (!(f.isInfinite() || (f.floatValue() == 0.0F && !allZeros))) {
+ //If it's too big for a float or the float value = 0 and the string
+ //has non-zeros in it, then float does not have the precision we want
+ return f;
+ }
+
+ } catch (final NumberFormatException nfe) { // NOPMD
+ // ignore the bad number
+ }
+ //$FALL-THROUGH$
+ case 'd' :
+ case 'D' :
+ try {
+ final Double d = NumberUtils.createDouble(numeric);
+ if (!(d.isInfinite() || (d.floatValue() == 0.0D && !allZeros))) {
+ return d;
+ }
+ } catch (final NumberFormatException nfe) { // NOPMD
+ // ignore the bad number
+ }
+ try {
+ return createBigDecimal(numeric);
+ } catch (final NumberFormatException e) { // NOPMD
+ // ignore the bad number
+ }
+ //$FALL-THROUGH$
+ default :
+ throw new NumberFormatException(str + " is not a valid number.");
+
+ }
+ }
+ //User doesn't have a preference on the return type, so let's start
+ //small and go from there...
+ if (expPos > -1 && expPos < str.length() - 1) {
+ exp = str.substring(expPos + 1, str.length());
+ } else {
+ exp = null;
+ }
+ if (dec == null && exp == null) { // no decimal point and no exponent
+ //Must be an Integer, Long, Biginteger
+ try {
+ return createInteger(str);
+ } catch (final NumberFormatException nfe) { // NOPMD
+ // ignore the bad number
+ }
+ try {
+ return createLong(str);
+ } catch (final NumberFormatException nfe) { // NOPMD
+ // ignore the bad number
+ }
+ return createBigInteger(str);
+ }
+
+ //Must be a Float, Double, BigDecimal
+ final boolean allZeros = isAllZeros(mant) && isAllZeros(exp);
+ try {
+ if(numDecimals <= 7){// If number has 7 or fewer digits past the decimal point then make it a float
+ final Float f = createFloat(str);
+ if (!(f.isInfinite() || (f.floatValue() == 0.0F && !allZeros))) {
+ return f;
+ }
+ }
+ } catch (final NumberFormatException nfe) { // NOPMD
+ // ignore the bad number
+ }
+ try {
+ if(numDecimals <= 16){// If number has between 8 and 16 digits past the decimal point then make it a double
+ final Double d = createDouble(str);
+ if (!(d.isInfinite() || (d.doubleValue() == 0.0D && !allZeros))) {
+ return d;
+ }
+ }
+ } catch (final NumberFormatException nfe) { // NOPMD
+ // ignore the bad number
+ }
+
+ return createBigDecimal(str);
+ }
+
+ /**
+ * <p>Utility method for {@link #createNumber(java.lang.String)}.</p>
+ *
+ * <p>Returns mantissa of the given number.</p>
+ *
+ * @param str the string representation of the number
+ * @return mantissa of the given number
+ */
+ private static String getMantissa(final String str) {
+ return getMantissa(str, str.length());
+ }
+
+ /**
+ * <p>Utility method for {@link #createNumber(java.lang.String)}.</p>
+ *
+ * <p>Returns mantissa of the given number.</p>
+ *
+ * @param str the string representation of the number
+ * @param stopPos the position of the exponent or decimal point
+ * @return mantissa of the given number
+ */
+ private static String getMantissa(final String str, final int stopPos) {
+ final char firstChar = str.charAt(0);
+ final boolean hasSign = (firstChar == '-' || firstChar == '+');
+
+ return hasSign ? str.substring(1, stopPos) : str.substring(0, stopPos);
+ }
+
+ /**
+ * <p>Utility method for {@link #createNumber(java.lang.String)}.</p>
+ *
+ * <p>Returns <code>true</code> if s is <code>null</code>.</p>
+ *
+ * @param str the String to check
+ * @return if it is all zeros or <code>null</code>
+ */
+ private static boolean isAllZeros(final String str) {
+ if (str == null) {
+ return true;
+ }
+ for (int i = str.length() - 1; i >= 0; i--) {
+ if (str.charAt(i) != '0') {
+ return false;
+ }
+ }
+ return str.length() > 0;
+ }
+
+ //-----------------------------------------------------------------------
+ /**
+ * <p>Convert a <code>String</code> to a <code>Float</code>.</p>
+ *
+ * <p>Returns <code>null</code> if the string is <code>null</code>.</p>
+ *
+ * @param str a <code>String</code> to convert, may be null
+ * @return converted <code>Float</code> (or null if the input is null)
+ * @throws NumberFormatException if the value cannot be converted
+ */
+ public static Float createFloat(final String str) {
+ if (str == null) {
+ return null;
+ }
+ return Float.valueOf(str);
+ }
+
+ /**
+ * <p>Convert a <code>String</code> to a <code>Double</code>.</p>
+ *
+ * <p>Returns <code>null</code> if the string is <code>null</code>.</p>
+ *
+ * @param str a <code>String</code> to convert, may be null
+ * @return converted <code>Double</code> (or null if the input is null)
+ * @throws NumberFormatException if the value cannot be converted
+ */
+ public static Double createDouble(final String str) {
+ if (str == null) {
+ return null;
+ }
+ return Double.valueOf(str);
+ }
+
+ /**
+ * <p>Convert a <code>String</code> to a <code>Integer</code>, handling
+ * hex (0xhhhh) and octal (0dddd) notations.
+ * N.B. a leading zero means octal; spaces are not trimmed.</p>
+ *
+ * <p>Returns <code>null</code> if the string is <code>null</code>.</p>
+ *
+ * @param str a <code>String</code> to convert, may be null
+ * @return converted <code>Integer</code> (or null if the input is null)
+ * @throws NumberFormatException if the value cannot be converted
+ */
+ public static Integer createInteger(final String str) {
+ if (str == null) {
+ return null;
+ }
+ // decode() handles 0xAABD and 0777 (hex and octal) as well.
+ return Integer.decode(str);
+ }
+
+ /**
+ * <p>Convert a <code>String</code> to a <code>Long</code>;
+ * since 3.1 it handles hex (0Xhhhh) and octal (0ddd) notations.
+ * N.B. a leading zero means octal; spaces are not trimmed.</p>
+ *
+ * <p>Returns <code>null</code> if the string is <code>null</code>.</p>
+ *
+ * @param str a <code>String</code> to convert, may be null
+ * @return converted <code>Long</code> (or null if the input is null)
+ * @throws NumberFormatException if the value cannot be converted
+ */
+ public static Long createLong(final String str) {
+ if (str == null) {
+ return null;
+ }
+ return Long.decode(str);
+ }
+
+ /**
+ * <p>Convert a <code>String</code> to a <code>BigInteger</code>;
+ * since 3.2 it handles hex (0x or #) and octal (0) notations.</p>
+ *
+ * <p>Returns <code>null</code> if the string is <code>null</code>.</p>
+ *
+ * @param str a <code>String</code> to convert, may be null
+ * @return converted <code>BigInteger</code> (or null if the input is null)
+ * @throws NumberFormatException if the value cannot be converted
+ */
+ public static BigInteger createBigInteger(final String str) {
+ if (str == null) {
+ return null;
+ }
+ int pos = 0; // offset within string
+ int radix = 10;
+ boolean negate = false; // need to negate later?
+ if (str.startsWith("-")) {
+ negate = true;
+ pos = 1;
+ }
+ if (str.startsWith("0x", pos) || str.startsWith("0X", pos)) { // hex
+ radix = 16;
+ pos += 2;
+ } else if (str.startsWith("#", pos)) { // alternative hex (allowed by Long/Integer)
+ radix = 16;
+ pos ++;
+ } else if (str.startsWith("0", pos) && str.length() > pos + 1) { // octal; so long as there are additional digits
+ radix = 8;
+ pos ++;
+ } // default is to treat as decimal
+
+ final BigInteger value = new BigInteger(str.substring(pos), radix);
+ return negate ? value.negate() : value;
+ }
+
+ /**
+ * <p>Convert a <code>String</code> to a <code>BigDecimal</code>.</p>
+ *
+ * <p>Returns <code>null</code> if the string is <code>null</code>.</p>
+ *
+ * @param str a <code>String</code> to convert, may be null
+ * @return converted <code>BigDecimal</code> (or null if the input is null)
+ * @throws NumberFormatException if the value cannot be converted
+ */
+ public static BigDecimal createBigDecimal(final String str) {
+ if (str == null) {
+ return null;
+ }
+ // handle JDK1.3.1 bug where "" throws IndexOutOfBoundsException
+ if (StringUtils.isBlank(str)) {
+ throw new NumberF
<TRUNCATED>
[2/2] [lang] Statement unnecessarily nested within else clause.
Posted by gg...@apache.org.
Statement unnecessarily nested within else clause.
Project: http://git-wip-us.apache.org/repos/asf/commons-lang/repo
Commit: http://git-wip-us.apache.org/repos/asf/commons-lang/commit/ddcf6aa5
Tree: http://git-wip-us.apache.org/repos/asf/commons-lang/tree/ddcf6aa5
Diff: http://git-wip-us.apache.org/repos/asf/commons-lang/diff/ddcf6aa5
Branch: refs/heads/master
Commit: ddcf6aa50b2e4f0c432add091ed6ea44b7f12365
Parents: 0432e83
Author: ggregory <gg...@apache.org>
Authored: Wed Feb 24 13:42:45 2016 -0800
Committer: ggregory <gg...@apache.org>
Committed: Wed Feb 24 13:42:45 2016 -0800
----------------------------------------------------------------------
.../apache/commons/lang3/math/NumberUtils.java | 3185 +++++++++---------
1 file changed, 1592 insertions(+), 1593 deletions(-)
----------------------------------------------------------------------