| /* |
| * 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.olingo.commons.core.edm.primitivetype; |
| |
| import java.math.BigDecimal; |
| import java.math.BigInteger; |
| import java.util.regex.Matcher; |
| import java.util.regex.Pattern; |
| |
| import org.apache.olingo.commons.api.edm.EdmPrimitiveType; |
| import org.apache.olingo.commons.api.edm.EdmPrimitiveTypeException; |
| |
| /** |
| * Implementation of the EDM primitive type Decimal. |
| */ |
| public final class EdmDecimal extends SingletonPrimitiveType { |
| |
| private static final Pattern PATTERN = Pattern.compile( |
| "(?:\\+|-)?(?:0*(\\p{Digit}+?))(?:\\.(\\p{Digit}+?)0*)?((?:E|e)(?:\\+|-)?\\p{Digit}+)?"); |
| |
| private static final EdmDecimal INSTANCE = new EdmDecimal(); |
| |
| public static EdmDecimal getInstance() { |
| return INSTANCE; |
| } |
| |
| @Override |
| public boolean isCompatible(final EdmPrimitiveType primitiveType) { |
| return primitiveType instanceof EdmByte |
| || primitiveType instanceof EdmSByte |
| || primitiveType instanceof EdmInt16 |
| || primitiveType instanceof EdmInt32 |
| || primitiveType instanceof EdmInt64 |
| || primitiveType instanceof EdmSingle |
| || primitiveType instanceof EdmDouble |
| || primitiveType instanceof EdmDecimal; |
| } |
| |
| @Override |
| public Class<?> getDefaultType() { |
| return BigDecimal.class; |
| } |
| |
| @Override |
| public boolean validate(final String value, |
| final Boolean isNullable, final Integer maxLength, final Integer precision, |
| final Integer scale, final Boolean isUnicode) { |
| |
| return value == null |
| ? isNullable == null || isNullable |
| : validateLiteral(value) && validatePrecisionAndScale(value, precision, scale); |
| } |
| |
| private static boolean validateLiteral(final String value) { |
| return PATTERN.matcher(value).matches(); |
| } |
| |
| private static boolean validatePrecisionAndScale(final String value, final Integer precision, |
| final Integer scale) { |
| |
| Matcher matcher = PATTERN.matcher(value); |
| matcher.matches(); |
| if (matcher.group(3) != null) { |
| String plainValue = new BigDecimal(value).toPlainString(); |
| matcher = PATTERN.matcher(plainValue); |
| matcher.matches(); |
| } |
| final int significantIntegerDigits = "0".equals(matcher.group(1)) ? 0 : matcher.group(1).length(); |
| final int decimals = matcher.group(2) == null ? 0 : matcher.group(2).length(); |
| return (precision == null || (significantIntegerDigits >= 0 && |
| significantIntegerDigits <= precision - ((scale == null) ? 0 : scale))) && |
| (decimals >= 0 && decimals <= ((scale == null) ? 0 : scale)); |
| } |
| |
| @Override |
| public boolean validateDecimals(final String value, |
| final Boolean isNullable, final Integer maxLength, final Integer precision, |
| final String scale, final Boolean isUnicode) { |
| |
| return value == null |
| ? isNullable == null || isNullable |
| : validateLiteral(value) && validatePrecisionAndScale(value, precision, scale); |
| } |
| |
| private boolean validatePrecisionAndScale(String value, Integer precision, String scale) { |
| Matcher matcher = PATTERN.matcher(value); |
| matcher.matches(); |
| if (matcher.group(3) != null) { |
| String plainValue = new BigDecimal(value).toPlainString(); |
| matcher = PATTERN.matcher(plainValue); |
| matcher.matches(); |
| } |
| int significantIntegerDigits = "0".equals(matcher.group(1)) ? 0 : matcher.group(1).length(); |
| int decimals = matcher.group(2) == null ? 0 : matcher.group(2).length(); |
| |
| try { |
| int scaleValue = (scale == null) ? 0 : Integer.parseInt(scale); |
| return (precision == null || (significantIntegerDigits >= 0 && |
| significantIntegerDigits <= precision - scaleValue)) && |
| (decimals >= 0 && decimals <= scaleValue); |
| } catch(NumberFormatException e) { |
| String scaleValue = (scale == null) ? String.valueOf(0) : scale; |
| if (scaleValue.equals("variable")) { |
| return (precision == null || |
| (significantIntegerDigits >= 0 && |
| (significantIntegerDigits <= precision - decimals))) && |
| (decimals >= 0 && decimals <= ((precision == null) ? 0 : precision)); |
| } else if (scaleValue.equals("floating")) { |
| Matcher matcher1 = PATTERN.matcher(value); |
| matcher1.matches(); |
| significantIntegerDigits = "0".equals(matcher1.group(1)) ? 0 : matcher1.group(1).length(); |
| decimals = matcher1.group(2) == null ? 0 : matcher1.group(2).length(); |
| int exponents = 0; |
| if (matcher1.group(3) != null) { |
| exponents = Integer.parseInt(matcher1.group(3).substring(1)); |
| if (exponents < -95 || exponents > 96) { |
| if (String.valueOf(exponents).startsWith("-")) { |
| significantIntegerDigits += Integer.parseInt(String.valueOf(exponents + 95).substring(1)); |
| exponents = -95; |
| } |
| } |
| return (significantIntegerDigits + decimals) <= 7 && (exponents >= -95 && exponents <= 96); |
| } |
| } else { |
| return false; |
| } |
| } |
| return false; |
| } |
| |
| @Override |
| protected <T> T internalValueOfString(final String value, |
| final Boolean isNullable, final Integer maxLength, final Integer precision, |
| final Integer scale, final Boolean isUnicode, final Class<T> returnType) throws EdmPrimitiveTypeException { |
| |
| if (!validateLiteral(value)) { |
| throw new EdmPrimitiveTypeException("The literal '" + value + "' has illegal content."); |
| } |
| if (!validatePrecisionAndScale(value, precision, scale)) { |
| throw new EdmPrimitiveTypeException("The literal '" + value + "' does not match the facets' constraints."); |
| } |
| |
| try { |
| return convertDecimal(new BigDecimal(value), returnType); |
| } catch (final IllegalArgumentException e) { |
| throw new EdmPrimitiveTypeException("The literal '" + value |
| + "' cannot be converted to value type " + returnType + ".", e); |
| } catch (final ClassCastException e) { |
| throw new EdmPrimitiveTypeException("The value type " + returnType + " is not supported.", e); |
| } |
| } |
| |
| /** |
| * Converts a {@link BigDecimal} value into the requested return type if possible. |
| * |
| * @param value the value |
| * @param returnType the class of the returned value; it must be one of {@link BigDecimal}, {@link Double}, |
| * {@link Float}, {@link BigInteger}, {@link Long}, {@link Integer}, {@link Short}, or {@link Byte} |
| * @return the converted value |
| * @throws IllegalArgumentException if the conversion is not possible or would lead to loss of data |
| * @throws ClassCastException if the return type is not allowed |
| */ |
| protected static <T> T convertDecimal(final BigDecimal value, final Class<T> returnType) |
| throws IllegalArgumentException, ClassCastException { |
| |
| if (returnType.isAssignableFrom(BigDecimal.class)) { |
| return returnType.cast(value); |
| } else if (returnType.isAssignableFrom(Double.class)) { |
| final double doubleValue = value.doubleValue(); |
| if (BigDecimal.valueOf(doubleValue).compareTo(value) == 0) { |
| return returnType.cast(doubleValue); |
| } else { |
| throw new IllegalArgumentException(); |
| } |
| } else if (returnType.isAssignableFrom(Float.class)) { |
| final Float floatValue = value.floatValue(); |
| if (BigDecimal.valueOf(floatValue).compareTo(value) == 0) { |
| return returnType.cast(floatValue); |
| } else { |
| throw new IllegalArgumentException(); |
| } |
| } else { |
| try { |
| if (returnType.isAssignableFrom(BigInteger.class)) { |
| return returnType.cast(value.toBigIntegerExact()); |
| } else if (returnType.isAssignableFrom(Long.class)) { |
| return returnType.cast(value.longValueExact()); |
| } else if (returnType.isAssignableFrom(Integer.class)) { |
| return returnType.cast(value.intValueExact()); |
| } else if (returnType.isAssignableFrom(Short.class)) { |
| return returnType.cast(value.shortValueExact()); |
| } else if (returnType.isAssignableFrom(Byte.class)) { |
| return returnType.cast(value.byteValueExact()); |
| } else { |
| throw new ClassCastException("unsupported return type " + returnType.getSimpleName()); |
| } |
| } catch (final ArithmeticException e) { |
| throw new IllegalArgumentException(e); |
| } |
| } |
| } |
| |
| @Override |
| protected <T> String internalValueToString(final T value, |
| final Boolean isNullable, final Integer maxLength, final Integer precision, |
| final Integer scale, final Boolean isUnicode) throws EdmPrimitiveTypeException { |
| |
| String result; |
| if (value instanceof Long || value instanceof Integer || value instanceof Short |
| || value instanceof Byte || value instanceof BigInteger) { |
| result = value.toString(); |
| final int digits = result.startsWith("-") ? result.length() - 1 : result.length(); |
| if (precision != null && precision < digits) { |
| throw new EdmPrimitiveTypeException("The value '" + value + "' does not match the facets' constraints."); |
| } |
| |
| } else if (value instanceof Double || value instanceof Float || value instanceof BigDecimal) { |
| BigDecimal bigDecimalValue; |
| try { |
| bigDecimalValue = value instanceof Double ? BigDecimal.valueOf((Double) value) |
| : value instanceof Float ? BigDecimal.valueOf((Float) value) : (BigDecimal) value; |
| } catch (final NumberFormatException e) { |
| throw new EdmPrimitiveTypeException("The value '" + value + "' is not valid.", e); |
| } |
| |
| final int digits = bigDecimalValue.scale() >= 0 |
| ? Math.max(bigDecimalValue.precision(), bigDecimalValue.scale()) |
| : bigDecimalValue.precision() - bigDecimalValue.scale(); |
| if ((precision == null || precision >= digits) && (bigDecimalValue.scale() <= (scale == null ? 0 : scale))) { |
| result = bigDecimalValue.toPlainString(); |
| } else { |
| throw new EdmPrimitiveTypeException("The value '" + value + "' does not match the facets' constraints."); |
| } |
| |
| } else { |
| throw new EdmPrimitiveTypeException("The value type " + value.getClass() + " is not supported."); |
| } |
| |
| return result; |
| } |
| } |