com.nordea.oss.copybook.converters.IntegerToInteger 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 
 * Copyright (c) 2016. Nordea Bank AB
 * Licensed under the MIT license (LICENSE.txt)
 */

package com.nordea.oss.copybook.converters;

import com.nordea.oss.copybook.exceptions.TypeConverterException;
import com.nordea.oss.ByteUtils;

public class IntegerToInteger extends TypeConverterBase {
    @Override
    public void validate(Class type, int size, int decimal) {
        if(size > 9) {
            throw new TypeConverterException("int is not large enough to hold possible value");
        }
        if(!(Integer.class.equals(type) || Integer.TYPE.equals(type))) {
            throw new TypeConverterException("Only supports converting to and from int or Integer");
        }
    }

    @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 Integer.parseInt(this.defaultValue);

        } else {
            return Integer.parseInt(getIntegerString(bytes, offset, length, removePadding));
        }
    }

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

        int i = value != null ? (int) value : Integer.parseInt(this.defaultValue);
        if (i < 0) {
            throw new TypeConverterException("Number can not be negative");
        }

        byte[] strBytes = Integer.toString(i).getBytes(this.charset);
        if (strBytes.length > length) {
            throw new TypeConverterException("Field to small for value: " + length + " < " + strBytes.length);
        }
        if (addPadding) {
            strBytes = padBytes(strBytes, length);
        }

        return strBytes;

    }

    protected String getIntegerString(byte[] bytes, int offset, int length, boolean removePadding) {
        String strValue = getString(bytes, offset, length, removePadding, 1);
        if(strValue.startsWith("-") || strValue.endsWith("-")) {
            throw new TypeConverterException("Integer value can not start or end with -");
        }
        return strValue;
    }
}