dk.nversion.copybook.converters.SignedIntegerToLong Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of copybook4java Show documentation

CopyBook serializer and deserializer for Java where CopyBook lines are used to annotate a normal Java class

The newest version!

/*
 * Copyright (c) 2015. Troels Liebe Bentsen 
 * Licensed under the MIT license (LICENSE.txt)
 */

package dk.nversion.copybook.converters;

import dk.nversion.ByteUtils;
import dk.nversion.copybook.exceptions.TypeConverterException;
import dk.nversion.copybook.serializers.CopyBookFieldSigningType;

public class SignedIntegerToLong extends SignedIntegerToInteger {
    @Override
    public void validate(Class type, int size, int decimals) {
        if(size > 22 && (this.signingType == CopyBookFieldSigningType.PREFIX || this.signingType == CopyBookFieldSigningType.POSTFIX)) {
            throw new TypeConverterException("long is not large enough to hold possible value");
        }
        if(size > 21 && (this.signingType == CopyBookFieldSigningType.LAST_BYTE_BIT8 || this.signingType == CopyBookFieldSigningType.LAST_BYTE_EBCDIC_BIT5)) {
            throw new TypeConverterException("long is not large enough to hold possible value");
        }

        if(!(Long.class.equals(type) || Long.TYPE.equals(type))) {
            throw new TypeConverterException("Only supports converting to and from long or Long");
        }
    }

    @Override
    public Object to(byte[] bytes, int offset, int length, int decimals, boolean removePadding) {
        if(this.defaultValue != null && ByteUtils.allEquals(bytes, this.nullFillerByte, offset, bytes.length)) { // All of value is null filler
            return Long.parseLong(defaultValue);
        } else {
            return Long.parseLong(getSignedIntegerString(bytes, offset, length, removePadding));
        }
    }

    @Override
    public byte[] from(Object value, int length, int decimals, boolean addPadding) {
        if(value == null && this.defaultValue == null) {
            return null;
        }

        long i = value != null ? (long)value : Long.parseLong(this.defaultValue);
        byte[] strBytes = getSignedBytes(Long.toString(Math.abs(i)), i < 0L);
        if(strBytes.length > length) {
            throw new TypeConverterException("Field to small for value: " + length + " < " + strBytes.length);
        }
        if(addPadding) {
            strBytes = padBytes(strBytes, length);
        }
        return strBytes;
    }
}