130 lines
5.3 KiB
Java
130 lines
5.3 KiB
Java
/*
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j8583 A Java implementation of the ISO8583 protocol
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Copyright (C) 2011 Enrique Zamudio Lopez
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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package com.solab.iso8583.parse;
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import java.io.UnsupportedEncodingException;
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import java.text.ParseException;
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import com.solab.iso8583.CustomBinaryField;
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import com.solab.iso8583.CustomField;
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import com.solab.iso8583.IsoType;
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import com.solab.iso8583.IsoValue;
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import com.solab.iso8583.util.HexCodec;
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/** This class is used to parse fields of type LLBIN.
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*
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* @author Enrique Zamudio
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*/
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public class LlbinParseInfo extends FieldParseInfo {
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public LlbinParseInfo() {
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super(IsoType.LLBIN, 0);
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}
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@Override
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public <T> IsoValue<?> parse(final int field, final byte[] buf,
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final int pos, final CustomField<T> custom)
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throws ParseException, UnsupportedEncodingException {
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if (pos < 0) {
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throw new ParseException(String.format("Invalid LLBIN field %d position %d",
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field, pos), pos);
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} else if (pos+2 > buf.length) {
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throw new ParseException(String.format("Insufficient LLBIN header field %d",
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field), pos);
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}
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length = decodeLength(buf, pos, 2);
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if (length < 0) {
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throw new ParseException(String.format("Invalid LLBIN field %d length %d pos %d",
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field, length, pos), pos);
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}
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if (length+pos+2 > buf.length) {
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throw new ParseException(String.format(
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"Insufficient data for LLBIN field %d, pos %d (LEN states '%s')",
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field, pos, new String(buf, pos, 2)), pos);
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}
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byte[] binval = length == 0 ? new byte[0] : HexCodec.hexDecode(new String(buf, pos + 2, length));
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if (custom == null) {
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return new IsoValue<byte[]>(type, binval, binval.length, null);
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} else if (custom instanceof CustomBinaryField) {
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try {
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T dec = ((CustomBinaryField<T>)custom).decodeBinaryField(buf, pos + 2, length);
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return dec == null ? new IsoValue<byte[]>(type, binval, binval.length, null) :
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new IsoValue<T>(type, dec, 0, custom);
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} catch (IndexOutOfBoundsException ex) {
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throw new ParseException(String.format(
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"Insufficient data for LLBIN field %d, pos %d (LEN states '%s')",
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field, pos, new String(buf, pos, 2)), pos);
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}
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} else {
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try {
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T dec = custom.decodeField(new String(buf, pos + 2, length));
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return dec == null ? new IsoValue<byte[]>(type, binval, binval.length, null) :
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new IsoValue<T>(type, dec, binval.length, custom);
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} catch (IndexOutOfBoundsException ex) {
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throw new ParseException(String.format(
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"Insufficient data for LLBIN field %d, pos %d (LEN states '%s')",
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field, pos, new String(buf, pos, 2)), pos);
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}
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}
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}
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@Override
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public <T> IsoValue<?> parseBinary(final int field, final byte[] buf,
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final int pos, final CustomField<T> custom)
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throws ParseException {
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if (pos < 0) {
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throw new ParseException(String.format("Invalid bin LLBIN field %d position %d",
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field, pos), pos);
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} else if (pos+1 > buf.length) {
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throw new ParseException(String.format("Insufficient bin LLBIN header field %d",
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field), pos);
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}
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final int l = (((buf[pos] & 0xf0) >> 4) * 10) + (buf[pos] & 0x0f);
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if (l < 0) {
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throw new ParseException(String.format("Invalid bin LLBIN length %d pos %d", length, pos), pos);
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}
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if (l+pos+1 > buf.length) {
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throw new ParseException(String.format(
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"Insufficient data for bin LLBIN field %d, pos %d: need %d, only %d available",
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field, pos, l, buf.length), pos);
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}
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byte[] _v = new byte[l];
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System.arraycopy(buf, pos+1, _v, 0, l);
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if (custom == null) {
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return new IsoValue<byte[]>(type, _v, null);
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} else if (custom instanceof CustomBinaryField) {
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try {
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T dec = ((CustomBinaryField<T>)custom).decodeBinaryField(buf, pos + 1, l);
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return dec == null ? new IsoValue<byte[]>(type, _v, _v.length, null) :
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new IsoValue<T>(type, dec, l, custom);
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} catch (IndexOutOfBoundsException ex) {
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throw new ParseException(String.format(
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"Insufficient data for LLBIN field %d, pos %d length %d",
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field, pos, l), pos);
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}
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} else {
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T dec = custom.decodeField(HexCodec.hexEncode(_v, 0, _v.length));
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return dec == null ? new IsoValue<byte[]>(type, _v, null) :
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new IsoValue<T>(type, dec, custom);
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}
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}
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}
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