com.ezylang.evalex.data.conversion.DefaultEvaluationValueConverter Maven / Gradle / Ivy
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EvalEx is a handy expression evaluator for Java, that allows to evaluate
expressions.
/*
Copyright 2012-2023 Udo Klimaschewski
Licensed 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 com.ezylang.evalex.data.conversion;
import com.ezylang.evalex.config.ExpressionConfiguration;
import com.ezylang.evalex.data.EvaluationValue;
import java.util.Arrays;
import java.util.List;
/**
* The default implementation of the {@link EvaluationValueConverterIfc}, used in the standard
* configuration.
*
*
*
* Input type Converter used
*
* BigDecimal NumberConverter Long, long NumberConverter Integer, int NumberConverter Short, short NumberConverter Byte, byte NumberConverter Double, double NumberConverter * Float, float NumberConverter * CharSequence , String StringConverter Boolean, boolean BooleanConverter Instant DateTimeConverter Date DateTimeConverter Calendar DateTimeConverter ZonedDateTime DateTimeConverter LocalDate DateTimeConverter - the configured zone ID will be used for conversion LocalDateTime DateTimeConverter - the configured zone ID will be used for conversion OffsetDateTime DateTimeConverter Duration DurationConverter ASTNode ASTNode List<?> ArrayConverter - each entry will be converted Map<?,?> StructureConverter - each entry will be converted
*
* * Be careful with conversion problems when using float or double, which are fractional
* numbers. A (float)0.1 is e.g. converted to 0.10000000149011612
*/
public class DefaultEvaluationValueConverter implements EvaluationValueConverterIfc {
static final List converters =
Arrays.asList(
new NumberConverter(),
new StringConverter(),
new BooleanConverter(),
new DateTimeConverter(),
new DurationConverter(),
new ExpressionNodeConverter(),
new ArrayConverter(),
new StructureConverter());
@Override
public EvaluationValue convertObject(Object object, ExpressionConfiguration configuration) {
if (object == null) {
return EvaluationValue.NULL_VALUE;
}
if (object instanceof EvaluationValue) {
return (EvaluationValue) object;
}
for (ConverterIfc converter : converters) {
if (converter.canConvert(object)) {
return converter.convert(object, configuration);
}
}
if (configuration.isBinaryAllowed()) {
return EvaluationValue.binaryValue(object);
}
throw new IllegalArgumentException(
"Unsupported data type '" + object.getClass().getName() + "'");
}
}