| /* |
| * 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.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 Double. |
| */ |
| public final class EdmDouble extends SingletonPrimitiveType { |
| |
| protected static final String NEGATIVE_INFINITY = "-INF"; |
| |
| protected static final String POSITIVE_INFINITY = "INF"; |
| |
| protected static final String NaN = "NaN"; |
| |
| private static final Pattern PATTERN = Pattern.compile( |
| "(?:\\+|-)?\\p{Digit}+(?:\\.\\p{Digit}+)?(?:(?:E|e)(?:\\+|-)?\\p{Digit}{1,3})?"); |
| |
| private static final EdmDouble INSTANCE = new EdmDouble(); |
| |
| public static EdmDouble 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; |
| } |
| |
| @Override |
| public Class<?> getDefaultType() { |
| return Double.class; |
| } |
| |
| @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 { |
| |
| Double result = null; |
| BigDecimal bigDecimalValue = null; |
| // Handle special values first. |
| if (value.equals(NEGATIVE_INFINITY)) { |
| result = Double.NEGATIVE_INFINITY; |
| } else if (value.equals(POSITIVE_INFINITY)) { |
| result = Double.POSITIVE_INFINITY; |
| } else if (value.equals(NaN)) { |
| result = Double.NaN; |
| } else { |
| // Now only "normal" numbers remain. |
| if (!PATTERN.matcher(value).matches()) { |
| throw new EdmPrimitiveTypeException("The literal '" + value + "' has illegal content."); |
| } |
| |
| // The number format is checked above, so we don't have to catch NumberFormatException. |
| bigDecimalValue = new BigDecimal(value); |
| result = bigDecimalValue.doubleValue(); |
| // "Real" infinite values have been treated already above, so we can throw an exception |
| // if the conversion to a double results in an infinite value. |
| if (result.isInfinite() || BigDecimal.valueOf(result).compareTo(bigDecimalValue) != 0) { |
| throw new EdmPrimitiveTypeException("The literal '" + value + "' has illegal content."); |
| } |
| } |
| |
| if (returnType.isAssignableFrom(Double.class)) { |
| return returnType.cast(result); |
| } else if (result.isInfinite() || result.isNaN()) { |
| if (returnType.isAssignableFrom(Float.class)) { |
| return returnType.cast(result.floatValue()); |
| } else { |
| throw new EdmPrimitiveTypeException("The literal '" + value |
| + "' cannot be converted to value type " + returnType + "."); |
| } |
| } else { |
| try { |
| return EdmDecimal.convertDecimal(bigDecimalValue, 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); |
| } |
| } |
| } |
| |
| @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 { |
| if (value instanceof Long) { |
| if (Math.abs((Long) value) < 1L << 51) { |
| return value.toString(); |
| } else { |
| throw new EdmPrimitiveTypeException("The value '" + value + "' is not valid."); |
| } |
| } else if (value instanceof Integer || value instanceof Short || value instanceof Byte) { |
| return value.toString(); |
| } else if (value instanceof Double) { |
| return (Double) value == Double.NEGATIVE_INFINITY ? NEGATIVE_INFINITY |
| : (Double) value == Double.POSITIVE_INFINITY ? POSITIVE_INFINITY : value.toString(); |
| } else if (value instanceof Float) { |
| return (Float) value == Float.NEGATIVE_INFINITY ? NEGATIVE_INFINITY |
| : (Float) value == Float.POSITIVE_INFINITY ? POSITIVE_INFINITY : value.toString(); |
| } else if (value instanceof BigDecimal) { |
| final double doubleValue = ((BigDecimal) value).doubleValue(); |
| if (!Double.isInfinite(doubleValue) && BigDecimal.valueOf(doubleValue).compareTo((BigDecimal) value) == 0) { |
| return value.toString(); |
| } else { |
| throw new EdmPrimitiveTypeException("The value '" + value + "' is not valid."); |
| } |
| } else { |
| throw new EdmPrimitiveTypeException("The value type " + value.getClass() + " is not supported."); |
| } |
| } |
| } |