Repository: tinkerpop Updated Branches: refs/heads/TINKERPOP-1736-master [created] 8da3509c5
Merge branch 'TINKERPOP-1736-tp32' into TINKERPOP-1736-master Project: http://git-wip-us.apache.org/repos/asf/tinkerpop/repo Commit: http://git-wip-us.apache.org/repos/asf/tinkerpop/commit/8da3509c Tree: http://git-wip-us.apache.org/repos/asf/tinkerpop/tree/8da3509c Diff: http://git-wip-us.apache.org/repos/asf/tinkerpop/diff/8da3509c Branch: refs/heads/TINKERPOP-1736-master Commit: 8da3509c53722b93123d725471ab48212102aced Parents: fcd623c 131b007 Author: Daniel Kuppitz <[email protected]> Authored: Tue Jul 25 22:19:52 2017 +0200 Committer: Daniel Kuppitz <[email protected]> Committed: Tue Jul 25 22:19:52 2017 +0200 ---------------------------------------------------------------------- CHANGELOG.asciidoc | 6 +++++ .../tinkerpop/gremlin/util/NumberHelper.java | 16 +++++++++++++- .../traversal/step/sideEffect/SackTest.java | 23 +++++++++++++++++++- 3 files changed, 43 insertions(+), 2 deletions(-) ---------------------------------------------------------------------- http://git-wip-us.apache.org/repos/asf/tinkerpop/blob/8da3509c/CHANGELOG.asciidoc ---------------------------------------------------------------------- http://git-wip-us.apache.org/repos/asf/tinkerpop/blob/8da3509c/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/util/NumberHelper.java ---------------------------------------------------------------------- diff --cc gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/util/NumberHelper.java index 95ab189,0000000..b560df3 mode 100644,000000..100644 --- a/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/util/NumberHelper.java +++ b/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/util/NumberHelper.java @@@ -1,280 -1,0 +1,294 @@@ +/* + * 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.tinkerpop.gremlin.util; + +import java.math.BigDecimal; +import java.math.BigInteger; ++import java.math.MathContext; +import java.util.function.BiFunction; + +/** + * @author Daniel Kuppitz (http://gremlin.guru) + */ +public final class NumberHelper { + + static final NumberHelper BYTE_NUMBER_HELPER = new NumberHelper( + (a, b) -> a.byteValue() + b.byteValue(), + (a, b) -> a.byteValue() - b.byteValue(), + (a, b) -> a.byteValue() * b.byteValue(), + (a, b) -> a.byteValue() / b.byteValue(), + (a, b) -> { + final byte x = a.byteValue(), y = b.byteValue(); + return x <= y ? x : y; + }, + (a, b) -> { + final byte x = a.byteValue(), y = b.byteValue(); + return x >= y ? x : y; + }); + static final NumberHelper SHORT_NUMBER_HELPER = new NumberHelper( + (a, b) -> a.shortValue() + b.shortValue(), + (a, b) -> a.shortValue() - b.shortValue(), + (a, b) -> a.shortValue() * b.shortValue(), + (a, b) -> a.shortValue() / b.shortValue(), + (a, b) -> { + final short x = a.shortValue(), y = b.shortValue(); + return x <= y ? x : y; + }, + (a, b) -> { + final short x = a.shortValue(), y = b.shortValue(); + return x >= y ? x : y; + }); + static final NumberHelper INTEGER_NUMBER_HELPER = new NumberHelper( + (a, b) -> a.intValue() + b.intValue(), + (a, b) -> a.intValue() - b.intValue(), + (a, b) -> a.intValue() * b.intValue(), + (a, b) -> a.intValue() / b.intValue(), + (a, b) -> { + final int x = a.intValue(), y = b.intValue(); + return x <= y ? x : y; + }, + (a, b) -> { + final int x = a.intValue(), y = b.intValue(); + return x >= y ? x : y; + }); + static final NumberHelper LONG_NUMBER_HELPER = new NumberHelper( + (a, b) -> a.longValue() + b.longValue(), + (a, b) -> a.longValue() - b.longValue(), + (a, b) -> a.longValue() * b.longValue(), + (a, b) -> a.longValue() / b.longValue(), + (a, b) -> { + final long x = a.longValue(), y = b.longValue(); + return x <= y ? x : y; + }, + (a, b) -> { + final long x = a.longValue(), y = b.longValue(); + return x >= y ? x : y; + }); + static final NumberHelper BIG_INTEGER_NUMBER_HELPER = new NumberHelper( + (a, b) -> bigIntegerValue(a).add(bigIntegerValue(b)), + (a, b) -> bigIntegerValue(a).subtract(bigIntegerValue(b)), + (a, b) -> bigIntegerValue(a).multiply(bigIntegerValue(b)), + (a, b) -> bigIntegerValue(a).divide(bigIntegerValue(b)), + (a, b) -> { + final BigInteger x = bigIntegerValue(a), y = bigIntegerValue(b); + return x.compareTo(y) <= 0 ? x : y; + }, + (a, b) -> { + final BigInteger x = bigIntegerValue(a), y = bigIntegerValue(b); + return x.compareTo(y) >= 0 ? x : y; + }); + static final NumberHelper FLOAT_NUMBER_HELPER = new NumberHelper( + (a, b) -> a.floatValue() + b.floatValue(), + (a, b) -> a.floatValue() - b.floatValue(), + (a, b) -> a.floatValue() * b.floatValue(), + (a, b) -> a.floatValue() / b.floatValue(), + (a, b) -> { + final float x = a.floatValue(), y = b.floatValue(); + return x <= y ? x : y; + }, + (a, b) -> { + final float x = a.floatValue(), y = b.floatValue(); + return x >= y ? x : y; + }); + static final NumberHelper DOUBLE_NUMBER_HELPER = new NumberHelper( + (a, b) -> a.doubleValue() + b.doubleValue(), + (a, b) -> a.doubleValue() - b.doubleValue(), + (a, b) -> a.doubleValue() * b.doubleValue(), + (a, b) -> a.doubleValue() / b.doubleValue(), + (a, b) -> { + final double x = a.doubleValue(), y = b.doubleValue(); + return x <= y ? x : y; + }, + (a, b) -> { + final double x = a.doubleValue(), y = b.doubleValue(); + return x >= y ? x : y; + }); + static final NumberHelper BIG_DECIMAL_NUMBER_HELPER = new NumberHelper( + (a, b) -> bigDecimalValue(a).add(bigDecimalValue(b)), + (a, b) -> bigDecimalValue(a).subtract(bigDecimalValue(b)), + (a, b) -> bigDecimalValue(a).multiply(bigDecimalValue(b)), - (a, b) -> bigDecimalValue(a).divide(bigDecimalValue(b)), ++ (a, b) -> { ++ final BigDecimal ba = bigDecimalValue(a); ++ final BigDecimal bb = bigDecimalValue(b); ++ try { ++ return ba.divide(bb); ++ } catch (ArithmeticException ignored) { ++ // set a default precision ++ final int precision = Math.max(ba.precision(),bb.precision()) + 10; ++ BigDecimal result = ba.divide(bb, new MathContext(precision)); ++ final int scale = Math.max(Math.max(ba.scale(), bb.scale()), 10); ++ if (result.scale() > scale) result = result.setScale(scale, BigDecimal.ROUND_HALF_UP); ++ return result; ++ } ++ }, + (a, b) -> { + final BigDecimal x = bigDecimalValue(a), y = bigDecimalValue(b); + return x.compareTo(y) <= 0 ? x : y; + }, + (a, b) -> { + final BigDecimal x = bigDecimalValue(a), y = bigDecimalValue(b); + return x.compareTo(y) >= 0 ? x : y; + }); + public final BiFunction<Number, Number, Number> add; + public final BiFunction<Number, Number, Number> sub; + public final BiFunction<Number, Number, Number> mul; + public final BiFunction<Number, Number, Number> div; + public final BiFunction<Number, Number, Number> min; + public final BiFunction<Number, Number, Number> max; + + private NumberHelper(final BiFunction<Number, Number, Number> add, + final BiFunction<Number, Number, Number> sub, + final BiFunction<Number, Number, Number> mul, + final BiFunction<Number, Number, Number> div, + final BiFunction<Number, Number, Number> min, + final BiFunction<Number, Number, Number> max + ) { + this.add = add; + this.sub = sub; + this.mul = mul; + this.div = div; + this.min = min; + this.max = max; + } + + public static Class<? extends Number> getHighestCommonNumberClass(final Number... numbers) { + return getHighestCommonNumberClass(false, numbers); + } + + public static Class<? extends Number> getHighestCommonNumberClass(final boolean forceFloatingPoint, final Number... numbers) { + int bits = 8; + boolean fp = forceFloatingPoint; + for (final Number number : numbers) { + if (number == null) continue; + final Class<? extends Number> clazz = number.getClass(); + if (clazz.equals(Byte.class)) continue; + if (clazz.equals(Short.class)) { + bits = bits < 16 ? 16 : bits; + } else if (clazz.equals(Integer.class)) { + bits = bits < 32 ? 32 : bits; + } else if (clazz.equals(Long.class)) { + bits = bits < 64 ? 64 : bits; + } else if (clazz.equals(BigInteger.class)) { + bits = bits < 128 ? 128 : bits; + } else if (clazz.equals(Float.class)) { + bits = bits < 32 ? 32 : bits; + fp = true; + } else if (clazz.equals(Double.class)) { + bits = bits < 64 ? 64 : bits; + fp = true; + } else /*if (clazz.equals(BigDecimal.class))*/ { + bits = bits < 128 ? 128 : bits; + fp = true; + break; // maxed out, no need to check remaining numbers + } + } + return determineNumberClass(bits, fp); + } + + public static Number add(final Number a, final Number b) { + final Class<? extends Number> clazz = getHighestCommonNumberClass(a, b); + return getHelper(clazz).add.apply(a, b); + } + + public static Number sub(final Number a, final Number b) { + final Class<? extends Number> clazz = getHighestCommonNumberClass(a, b); + return getHelper(clazz).sub.apply(a, b); + } + + public static Number mul(final Number a, final Number b) { + final Class<? extends Number> clazz = getHighestCommonNumberClass(a, b); + return getHelper(clazz).mul.apply(a, b); + } + + public static Number div(final Number a, final Number b) { + return div(a, b, false); + } + + public static Number div(final Number a, final Number b, final boolean forceFloatingPoint) { + final Class<? extends Number> clazz = getHighestCommonNumberClass(forceFloatingPoint, a, b); + return getHelper(clazz).div.apply(a, b); + } + + public static Number min(final Number a, final Number b) { + final Class<? extends Number> clazz = getHighestCommonNumberClass(a, b); + return getHelper(clazz).min.apply(a, b); + } + + public static Number max(final Number a, final Number b) { + final Class<? extends Number> clazz = getHighestCommonNumberClass(a, b); + return getHelper(clazz).max.apply(a, b); + } + + private static NumberHelper getHelper(final Class<? extends Number> clazz) { + if (clazz.equals(Byte.class)) { + return BYTE_NUMBER_HELPER; + } + if (clazz.equals(Short.class)) { + return SHORT_NUMBER_HELPER; + } + if (clazz.equals(Integer.class)) { + return INTEGER_NUMBER_HELPER; + } + if (clazz.equals(Long.class)) { + return LONG_NUMBER_HELPER; + } + if (clazz.equals(BigInteger.class)) { + return BIG_INTEGER_NUMBER_HELPER; + } + if (clazz.equals(Float.class)) { + return FLOAT_NUMBER_HELPER; + } + if (clazz.equals(Double.class)) { + return DOUBLE_NUMBER_HELPER; + } + if (clazz.equals(BigDecimal.class)) { + return BIG_DECIMAL_NUMBER_HELPER; + } + throw new IllegalArgumentException("Unsupported numeric type: " + clazz); + } + + private static BigInteger bigIntegerValue(final Number number) { + if (number == null) return null; + if (number instanceof BigInteger) return (BigInteger) number; + return BigInteger.valueOf(number.longValue()); + } + + private static BigDecimal bigDecimalValue(final Number number) { + if (number == null) return null; + if (number instanceof BigDecimal) return (BigDecimal) number; + if (number instanceof BigInteger) return new BigDecimal((BigInteger) number); + return (number instanceof Double || number instanceof Float) + ? BigDecimal.valueOf(number.doubleValue()) + : BigDecimal.valueOf(number.longValue()); + } + + private static Class<? extends Number> determineNumberClass(final int bits, final boolean floatingPoint) { + if (floatingPoint) { + if (bits <= 32) return Float.class; + if (bits <= 64) return Double.class; + return BigDecimal.class; + } else { + if (bits <= 8) return Byte.class; + if (bits <= 16) return Short.class; + if (bits <= 32) return Integer.class; + if (bits <= 64) return Long.class; + return BigInteger.class; + } + } +} http://git-wip-us.apache.org/repos/asf/tinkerpop/blob/8da3509c/gremlin-test/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/sideEffect/SackTest.java ----------------------------------------------------------------------
