diff -r 000000000000 -r 724f3e1ea53e emul/compact/src/main/java/java/math/RoundingMode.java
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/emul/compact/src/main/java/java/math/RoundingMode.java Sat Sep 07 13:51:24 2013 +0200
@@ -0,0 +1,349 @@
+/*
+ * Copyright (c) 2003, 2011, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation. Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code 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
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * Portions Copyright IBM Corporation, 2001. All Rights Reserved.
+ */
+package java.math;
+
+/**
+ * Specifies a rounding behavior for numerical operations
+ * capable of discarding precision. Each rounding mode indicates how
+ * the least significant returned digit of a rounded result is to be
+ * calculated. If fewer digits are returned than the digits needed to
+ * represent the exact numerical result, the discarded digits will be
+ * referred to as the discarded fraction regardless the digits'
+ * contribution to the value of the number. In other words,
+ * considered as a numerical value, the discarded fraction could have
+ * an absolute value greater than one.
+ *
+ * Each rounding mode description includes a table listing how
+ * different two-digit decimal values would round to a one digit
+ * decimal value under the rounding mode in question. The result
+ * column in the tables could be gotten by creating a
+ * {@code BigDecimal} number with the specified value, forming a
+ * {@link MathContext} object with the proper settings
+ * ({@code precision} set to {@code 1}, and the
+ * {@code roundingMode} set to the rounding mode in question), and
+ * calling {@link BigDecimal#round round} on this number with the
+ * proper {@code MathContext}. A summary table showing the results
+ * of these rounding operations for all rounding modes appears below.
+ *
+ *
+ *
+ * Summary of Rounding Operations Under Different Rounding Modes
+ * | Result of rounding input to one digit with the given
+ * rounding mode |
+ *
|---|
+ * | Input Number | {@code UP} |
+ * {@code DOWN} |
+ * {@code CEILING} |
+ * {@code FLOOR} |
+ * {@code HALF_UP} |
+ * {@code HALF_DOWN} |
+ * {@code HALF_EVEN} |
+ * {@code UNNECESSARY} |
+ *
+ *
| 5.5 | 6 | 5 | 6 | 5 | 6 | 5 | 6 | throw {@code ArithmeticException} |
+ *
| 2.5 | 3 | 2 | 3 | 2 | 3 | 2 | 2 | throw {@code ArithmeticException} |
+ *
| 1.6 | 2 | 1 | 2 | 1 | 2 | 2 | 2 | throw {@code ArithmeticException} |
+ *
| 1.1 | 2 | 1 | 2 | 1 | 1 | 1 | 1 | throw {@code ArithmeticException} |
+ *
| 1.0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
+ *
| -1.0 | -1 | -1 | -1 | -1 | -1 | -1 | -1 | -1 |
+ *
| -1.1 | -2 | -1 | -1 | -2 | -1 | -1 | -1 | throw {@code ArithmeticException} |
+ *
| -1.6 | -2 | -1 | -1 | -2 | -2 | -2 | -2 | throw {@code ArithmeticException} |
+ *
| -2.5 | -3 | -2 | -2 | -3 | -3 | -2 | -2 | throw {@code ArithmeticException} |
+ *
| -5.5 | -6 | -5 | -5 | -6 | -6 | -5 | -6 | throw {@code ArithmeticException} |
+ *
+ *
+ *
+ * This {@code enum} is intended to replace the integer-based
+ * enumeration of rounding mode constants in {@link BigDecimal}
+ * ({@link BigDecimal#ROUND_UP}, {@link BigDecimal#ROUND_DOWN},
+ * etc. ).
+ *
+ * @see BigDecimal
+ * @see MathContext
+ * @author Josh Bloch
+ * @author Mike Cowlishaw
+ * @author Joseph D. Darcy
+ * @since 1.5
+ */
+public enum RoundingMode {
+
+ /**
+ * Rounding mode to round away from zero. Always increments the
+ * digit prior to a non-zero discarded fraction. Note that this
+ * rounding mode never decreases the magnitude of the calculated
+ * value.
+ *
+ *
Example:
+ *
+ *| Input Number |
+ * Input rounded to one digit
with {@code UP} rounding
+ * |
|---|
| 5.5 | 6 |
+ *
| 2.5 | 3 |
+ *
| 1.6 | 2 |
+ *
| 1.1 | 2 |
+ *
| 1.0 | 1 |
+ *
| -1.0 | -1 |
+ *
| -1.1 | -2 |
+ *
| -1.6 | -2 |
+ *
| -2.5 | -3 |
+ *
| -5.5 | -6 |
+ *
+ */
+ UP(BigDecimal.ROUND_UP),
+
+ /**
+ * Rounding mode to round towards zero. Never increments the digit
+ * prior to a discarded fraction (i.e., truncates). Note that this
+ * rounding mode never increases the magnitude of the calculated value.
+ *
+ *Example:
+ *
+ *| Input Number |
+ * Input rounded to one digit
with {@code DOWN} rounding
+ * |
|---|
| 5.5 | 5 |
+ *
| 2.5 | 2 |
+ *
| 1.6 | 1 |
+ *
| 1.1 | 1 |
+ *
| 1.0 | 1 |
+ *
| -1.0 | -1 |
+ *
| -1.1 | -1 |
+ *
| -1.6 | -1 |
+ *
| -2.5 | -2 |
+ *
| -5.5 | -5 |
+ *
+ */
+ DOWN(BigDecimal.ROUND_DOWN),
+
+ /**
+ * Rounding mode to round towards positive infinity. If the
+ * result is positive, behaves as for {@code RoundingMode.UP};
+ * if negative, behaves as for {@code RoundingMode.DOWN}. Note
+ * that this rounding mode never decreases the calculated value.
+ *
+ *Example:
+ *
+ *| Input Number |
+ * Input rounded to one digit
with {@code CEILING} rounding
+ * |
|---|
| 5.5 | 6 |
+ *
| 2.5 | 3 |
+ *
| 1.6 | 2 |
+ *
| 1.1 | 2 |
+ *
| 1.0 | 1 |
+ *
| -1.0 | -1 |
+ *
| -1.1 | -1 |
+ *
| -1.6 | -1 |
+ *
| -2.5 | -2 |
+ *
| -5.5 | -5 |
+ *
+ */
+ CEILING(BigDecimal.ROUND_CEILING),
+
+ /**
+ * Rounding mode to round towards negative infinity. If the
+ * result is positive, behave as for {@code RoundingMode.DOWN};
+ * if negative, behave as for {@code RoundingMode.UP}. Note that
+ * this rounding mode never increases the calculated value.
+ *
+ *Example:
+ *
+ *| Input Number |
+ * Input rounded to one digit
with {@code FLOOR} rounding
+ * |
|---|
| 5.5 | 5 |
+ *
| 2.5 | 2 |
+ *
| 1.6 | 1 |
+ *
| 1.1 | 1 |
+ *
| 1.0 | 1 |
+ *
| -1.0 | -1 |
+ *
| -1.1 | -2 |
+ *
| -1.6 | -2 |
+ *
| -2.5 | -3 |
+ *
| -5.5 | -6 |
+ *
+ */
+ FLOOR(BigDecimal.ROUND_FLOOR),
+
+ /**
+ * Rounding mode to round towards {@literal "nearest neighbor"}
+ * unless both neighbors are equidistant, in which case round up.
+ * Behaves as for {@code RoundingMode.UP} if the discarded
+ * fraction is ≥ 0.5; otherwise, behaves as for
+ * {@code RoundingMode.DOWN}. Note that this is the rounding
+ * mode commonly taught at school.
+ *
+ *Example:
+ *
+ *| Input Number |
+ * Input rounded to one digit
with {@code HALF_UP} rounding
+ * |
|---|
| 5.5 | 6 |
+ *
| 2.5 | 3 |
+ *
| 1.6 | 2 |
+ *
| 1.1 | 1 |
+ *
| 1.0 | 1 |
+ *
| -1.0 | -1 |
+ *
| -1.1 | -1 |
+ *
| -1.6 | -2 |
+ *
| -2.5 | -3 |
+ *
| -5.5 | -6 |
+ *
+ */
+ HALF_UP(BigDecimal.ROUND_HALF_UP),
+
+ /**
+ * Rounding mode to round towards {@literal "nearest neighbor"}
+ * unless both neighbors are equidistant, in which case round
+ * down. Behaves as for {@code RoundingMode.UP} if the discarded
+ * fraction is > 0.5; otherwise, behaves as for
+ * {@code RoundingMode.DOWN}.
+ *
+ *Example:
+ *
+ *| Input Number |
+ * Input rounded to one digit
with {@code HALF_DOWN} rounding
+ * |
|---|
| 5.5 | 5 |
+ *
| 2.5 | 2 |
+ *
| 1.6 | 2 |
+ *
| 1.1 | 1 |
+ *
| 1.0 | 1 |
+ *
| -1.0 | -1 |
+ *
| -1.1 | -1 |
+ *
| -1.6 | -2 |
+ *
| -2.5 | -2 |
+ *
| -5.5 | -5 |
+ *
+ */
+ HALF_DOWN(BigDecimal.ROUND_HALF_DOWN),
+
+ /**
+ * Rounding mode to round towards the {@literal "nearest neighbor"}
+ * unless both neighbors are equidistant, in which case, round
+ * towards the even neighbor. Behaves as for
+ * {@code RoundingMode.HALF_UP} if the digit to the left of the
+ * discarded fraction is odd; behaves as for
+ * {@code RoundingMode.HALF_DOWN} if it's even. Note that this
+ * is the rounding mode that statistically minimizes cumulative
+ * error when applied repeatedly over a sequence of calculations.
+ * It is sometimes known as {@literal "Banker's rounding,"} and is
+ * chiefly used in the USA. This rounding mode is analogous to
+ * the rounding policy used for {@code float} and {@code double}
+ * arithmetic in Java.
+ *
+ *Example:
+ *
+ *| Input Number |
+ * Input rounded to one digit
with {@code HALF_EVEN} rounding
+ * |
|---|
| 5.5 | 6 |
+ *
| 2.5 | 2 |
+ *
| 1.6 | 2 |
+ *
| 1.1 | 1 |
+ *
| 1.0 | 1 |
+ *
| -1.0 | -1 |
+ *
| -1.1 | -1 |
+ *
| -1.6 | -2 |
+ *
| -2.5 | -2 |
+ *
| -5.5 | -6 |
+ *
+ */
+ HALF_EVEN(BigDecimal.ROUND_HALF_EVEN),
+
+ /**
+ * Rounding mode to assert that the requested operation has an exact
+ * result, hence no rounding is necessary. If this rounding mode is
+ * specified on an operation that yields an inexact result, an
+ * {@code ArithmeticException} is thrown.
+ *Example:
+ *
+ *| Input Number |
+ * Input rounded to one digit
with {@code UNNECESSARY} rounding
+ * |
|---|
| 5.5 | throw {@code ArithmeticException} |
+ *
| 2.5 | throw {@code ArithmeticException} |
+ *
| 1.6 | throw {@code ArithmeticException} |
+ *
| 1.1 | throw {@code ArithmeticException} |
+ *
| 1.0 | 1 |
+ *
| -1.0 | -1 |
+ *
| -1.1 | throw {@code ArithmeticException} |
+ *
| -1.6 | throw {@code ArithmeticException} |
+ *
| -2.5 | throw {@code ArithmeticException} |
+ *
| -5.5 | throw {@code ArithmeticException} |
+ *
+ */
+ UNNECESSARY(BigDecimal.ROUND_UNNECESSARY);
+
+ // Corresponding BigDecimal rounding constant
+ final int oldMode;
+
+ /**
+ * Constructor
+ *
+ * @param oldMode The {@code BigDecimal} constant corresponding to
+ * this mode
+ */
+ private RoundingMode(int oldMode) {
+ this.oldMode = oldMode;
+ }
+
+ /**
+ * Returns the {@code RoundingMode} object corresponding to a
+ * legacy integer rounding mode constant in {@link BigDecimal}.
+ *
+ * @param rm legacy integer rounding mode to convert
+ * @return {@code RoundingMode} corresponding to the given integer.
+ * @throws IllegalArgumentException integer is out of range
+ */
+ public static RoundingMode valueOf(int rm) {
+ switch(rm) {
+
+ case BigDecimal.ROUND_UP:
+ return UP;
+
+ case BigDecimal.ROUND_DOWN:
+ return DOWN;
+
+ case BigDecimal.ROUND_CEILING:
+ return CEILING;
+
+ case BigDecimal.ROUND_FLOOR:
+ return FLOOR;
+
+ case BigDecimal.ROUND_HALF_UP:
+ return HALF_UP;
+
+ case BigDecimal.ROUND_HALF_DOWN:
+ return HALF_DOWN;
+
+ case BigDecimal.ROUND_HALF_EVEN:
+ return HALF_EVEN;
+
+ case BigDecimal.ROUND_UNNECESSARY:
+ return UNNECESSARY;
+
+ default:
+ throw new IllegalArgumentException("argument out of range");
+ }
+ }
+}