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* 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
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package org.apache.olingo.odata2.core.edm;
import java.math.BigDecimal;
import java.util.Locale;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.apache.olingo.odata2.api.edm.EdmFacets;
import org.apache.olingo.odata2.api.edm.EdmLiteralKind;
import org.apache.olingo.odata2.api.edm.EdmSimpleType;
import org.apache.olingo.odata2.api.edm.EdmSimpleTypeException;
/**
* Implementation of the EDM simple type Double.
*
*/
public class EdmDouble extends AbstractSimpleType {
// value-range limitations according to the CSDL document
private static final int MAX_PRECISION = 15;
private static final int MAX_SCALE = 308;
private static final Pattern PATTERN = Pattern.compile(
"(?:\\+|-)?\\p{Digit}+(?:\\.\\p{Digit}+)?(?:(?:E|e)(?:\\+|-)?\\p{Digit}{1,3})?(D|d)?");
private static final EdmDouble instance = new EdmDouble();
public static EdmDouble getInstance() {
return instance;
}
@Override
public boolean isCompatible(final EdmSimpleType simpleType) {
return simpleType instanceof Bit
|| simpleType instanceof Uint7
|| simpleType instanceof EdmByte
|| simpleType instanceof EdmSByte
|| simpleType instanceof EdmInt16
|| simpleType instanceof EdmInt32
|| simpleType instanceof EdmInt64
|| simpleType instanceof EdmSingle
|| simpleType instanceof EdmDouble;
}
@Override
public Class<?> getDefaultType() {
return Double.class;
}
@Override
protected <T> T internalValueOfString(final String value, final EdmLiteralKind literalKind, final EdmFacets facets,
final Class<T> returnType) throws EdmSimpleTypeException {
String valueString = value;
Double result = null;
// Handle special values first.
if (value.equals("-INF")) {
result = Double.NEGATIVE_INFINITY;
} else if (value.equals("INF")) {
result = Double.POSITIVE_INFINITY;
} else if (value.equals("NaN")) {
result = Double.NaN;
} else {
// Now only "normal" numbers remain.
final Matcher matcher = PATTERN.matcher(value);
if (!matcher.matches()
|| (literalKind == EdmLiteralKind.URI) == (matcher.group(1) == null)) {
throw new EdmSimpleTypeException(EdmSimpleTypeException.LITERAL_ILLEGAL_CONTENT.addContent(value));
}
if (literalKind == EdmLiteralKind.URI) {
valueString = value.substring(0, value.length() - 1);
}
// The number format is checked above, so we don't have to catch NumberFormatException.
result = Double.valueOf(valueString);
// "Real" infinite values have been treated already above, so we can throw an exception
// if the conversion to a float results in an infinite value.
if (result.isInfinite()) {
throw new EdmSimpleTypeException(EdmSimpleTypeException.LITERAL_ILLEGAL_CONTENT.addContent(value));
}
}
if (returnType.isAssignableFrom(Double.class)) {
return returnType.cast(result);
} else if (returnType.isAssignableFrom(Float.class)) {
if (result.floatValue() == result) {
return returnType.cast(result.floatValue());
} else {
throw new EdmSimpleTypeException(EdmSimpleTypeException.LITERAL_UNCONVERTIBLE_TO_VALUE_TYPE.addContent(value,
returnType));
}
} else if (result.isInfinite() || result.isNaN()) {
throw new EdmSimpleTypeException(EdmSimpleTypeException.LITERAL_UNCONVERTIBLE_TO_VALUE_TYPE.addContent(value,
returnType));
} else {
try {
final BigDecimal valueBigDecimal = new BigDecimal(valueString);
if (returnType.isAssignableFrom(BigDecimal.class)) {
return returnType.cast(valueBigDecimal);
} else if (returnType.isAssignableFrom(Long.class)) {
return returnType.cast(valueBigDecimal.longValueExact());
} else if (returnType.isAssignableFrom(Integer.class)) {
return returnType.cast(valueBigDecimal.intValueExact());
} else if (returnType.isAssignableFrom(Short.class)) {
return returnType.cast(valueBigDecimal.shortValueExact());
} else if (returnType.isAssignableFrom(Byte.class)) {
return returnType.cast(valueBigDecimal.byteValueExact());
} else {
throw new EdmSimpleTypeException(EdmSimpleTypeException.VALUE_TYPE_NOT_SUPPORTED.addContent(returnType));
}
} catch (final ArithmeticException e) {
throw new EdmSimpleTypeException(EdmSimpleTypeException.LITERAL_UNCONVERTIBLE_TO_VALUE_TYPE.addContent(value,
returnType), e);
}
}
}
@Override
protected <T> String internalValueToString(final T value, final EdmLiteralKind literalKind, final EdmFacets facets)
throws EdmSimpleTypeException {
if (value instanceof Long) {
if (Math.abs((Long) value) < Math.pow(10, MAX_PRECISION)) {
return value.toString();
} else {
throw new EdmSimpleTypeException(EdmSimpleTypeException.VALUE_ILLEGAL_CONTENT.addContent(value));
}
} else if (value instanceof Integer || value instanceof Short || value instanceof Byte) {
return value.toString();
} else if (value instanceof Double) {
final String result = value.toString();
return ((Double) value).isInfinite() ? result.toUpperCase(Locale.ROOT)
.substring(0, value.toString().length() - 5) : result;
} else if (value instanceof Float) {
final String result = value.toString();
return ((Float) value).isInfinite() ? result.toUpperCase(Locale.ROOT).substring(0, value.toString().length() - 5)
: result;
} else if (value instanceof BigDecimal) {
if (((BigDecimal) value).precision() <= MAX_PRECISION && Math.abs(((BigDecimal) value).scale()) <= MAX_SCALE) {
return ((BigDecimal) value).toString();
} else {
throw new EdmSimpleTypeException(EdmSimpleTypeException.VALUE_ILLEGAL_CONTENT.addContent(value));
}
} else {
throw new EdmSimpleTypeException(EdmSimpleTypeException.VALUE_TYPE_NOT_SUPPORTED.addContent(value.getClass()));
}
}
@Override
public String toUriLiteral(final String literal) {
return literal.equals("-INF") || literal.equals("INF") || literal.equals("NaN") ?
literal : literal + "D";
}
}