com.speedment.runtime.typemapper.other.BinaryToBigIntegerMapper Maven / Gradle / Ivy

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A Speedment bundle that shades all dependencies into one jar. This is useful when deploying an application on a server.

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/*
 *
 * Copyright (c) 2006-2019, Speedment, Inc. All Rights Reserved.
 *
 * 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.speedment.runtime.typemapper.other;

import com.speedment.runtime.config.Column;
import com.speedment.runtime.typemapper.TypeMapper;
import com.speedment.runtime.typemapper.exception.SpeedmentTypeMapperException;

import java.lang.reflect.Type;
import java.math.BigDecimal;
import java.math.BigInteger;

import static java.lang.String.format;

/**
 * Maps between a large integer stored in binary form into a java
 * {@link BigDecimal}.
 *
 * @author Emil Forslund
 * @since  3.0.23
 */
public final class BinaryToBigIntegerMapper
implements TypeMapper {

    @Override
    public String getLabel() {
        return "BINARY to BigInteger Mapper";
    }

    @Override
    public Type getJavaType(Column column) {
        return BigInteger.class;
    }

    @Override
    public Category getJavaTypeCategory(Column column) {
        return Category.COMPARABLE;
    }

    @Override
    public BigInteger toJavaType(Column column, Class entityType, Object value) {
        if (value == null) return null;

        try {
            final byte[] bytes = (byte[]) value;
            return new BigInteger(bytes);
        } catch (final ClassCastException ex) {
            throw new SpeedmentTypeMapperException(format(
                "Expected input type to be a byte[], but was %s.",
                value.getClass().getName()), ex);
        }
    }

    @Override
    public Object toDatabaseType(BigInteger value) {
        if (value == null) return null;
        else return value.toByteArray();
    }

    @Override
    public Ordering getOrdering() {
        return Ordering.UNSPECIFIED;
    }
}