com.credibledoc.iso8583packer.dump.DumpService Maven / Gradle / Ivy
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Helps to define message structure in ISO 8583 and other formats.
package com.credibledoc.iso8583packer.dump;
import com.credibledoc.iso8583packer.bitmap.BitmapService;
import com.credibledoc.iso8583packer.exception.PackerRuntimeException;
import com.credibledoc.iso8583packer.hex.HexService;
import com.credibledoc.iso8583packer.masking.Masker;
import com.credibledoc.iso8583packer.message.MsgField;
import com.credibledoc.iso8583packer.message.MsgPair;
import com.credibledoc.iso8583packer.message.MsgValue;
import com.credibledoc.iso8583packer.navigator.Navigator;
import com.credibledoc.iso8583packer.navigator.NavigatorService;
import com.credibledoc.iso8583packer.string.StringUtils;
import com.credibledoc.iso8583packer.stringer.StringStringer;
import com.credibledoc.iso8583packer.stringer.Stringer;
import com.credibledoc.iso8583packer.tag.TagPacker;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.ByteArrayOutputStream;
import java.io.PrintStream;
import java.nio.charset.StandardCharsets;
import java.util.BitSet;
import java.util.List;
import java.util.Objects;
/**
* The service creates the String representation of the {@link MsgField}s and {@link MsgValue}s for logging and debugging purposes.
*
* @author Kyrylo Semenko
*/
public class DumpService implements Visualizer {
private static final Logger logger = LoggerFactory.getLogger(DumpService.class);
public static final String FOR_SPACES = " ";
private static final String VAL_ATTRIBUTE_PREFIX = " val=\"";
private static final String VAL_HEX_ATTRIBUTE_PREFIX = " valHex=\"";
protected static DumpService instance;
protected Navigator navigator;
/**
* Please use the {@link #getInstance()} method instead of this constructor.
*/
public DumpService() {
// empty
}
/**
* Static factory.
* @return The single instance of the {@link DumpService}.
*/
public static DumpService getInstance() {
if (instance == null) {
instance = new DumpService();
instance.createDefaultServices();
}
return instance;
}
/**
* Create instances of services used in the builder. The method may be overridden if needed.
*/
protected void createDefaultServices() {
navigator = NavigatorService.getInstance();
}
@Override
public String dumpMsgField(MsgField msgField) {
try {
final ByteArrayOutputStream baos = new ByteArrayOutputStream();
try (PrintStream printStream = new PrintStream(baos, true, "UTF-8")) {
dumpMsgField(msgField, printStream, null, " ");
}
return new String(baos.toByteArray(), StandardCharsets.UTF_8);
} catch (Exception e) {
String message = "Error in dump method.";
logger.error(message, e);
// Do nothing, it is logging only.
return message;
}
}
@Override
public String dumpMsgValue(MsgField msgField, MsgValue msgValue, boolean maskPrivateData) {
try {
final ByteArrayOutputStream baos = new ByteArrayOutputStream();
try (PrintStream printStream = new PrintStream(baos, true, "UTF-8")) {
dumpMsgValue(msgField, msgValue, printStream, null, " ", maskPrivateData);
}
return new String(baos.toByteArray(), StandardCharsets.UTF_8);
} catch (Exception e) {
String message = "Error in dump method.";
logger.error(message, e);
// Do nothing, it is logging only.
return message;
}
}
@Override
public void dumpMsgField(MsgField msgField, PrintStream printStream, String indent, String indentForChildren) {
if (indent == null) {
indent = "";
}
if (StringUtils.isEmpty(indentForChildren)) {
indentForChildren = " ";
}
String fieldNumString = getAttributeString(msgField.getFieldNum(), " fieldNum=\"");
String tagString = getAttributeString(msgField.getTag(), " tag=\"");
String nameString = getAttributeString(msgField.getName(), " name=\"");
String lengthPackerString = msgField.getLengthPacker() == null ?
"" : (" lengthPacker=\"" + msgField.getLengthPacker().getClass().getSimpleName() + "\"");
String isoBitMapPackerString = msgField.getBitMapPacker() == null ?
"" : (" bitMapPacker=\"" + msgField.getBitMapPacker().getClass().getSimpleName() + "\"");
String interpreterString = getBodyPackerString(msgField);
String maxLenString = getMaxLenString(msgField);
String lenString = getLenString(msgField);
String childTagPackerString = getChildTagPackerString(msgField);
String tagPackerString = msgField.getTagPacker() == null ? "" :
" tagPacker=\"" + msgField.getTagPacker().getClass().getSimpleName() + "\"";
String typeString = " type=\"" + msgField.getType() + "\"";
printStream.print(indent + "");
for (MsgField child : msgField.getChildren()) {
dumpMsgField(child, printStream, indent + indentForChildren, indentForChildren);
}
printStream.println(indent + "");
} else {
printStream.println("/>");
}
}
protected String getChildTagPackerString(MsgField msgField) {
String childTagPackerString;
TagPacker tagPacker = msgField.getChildrenTagPacker();
if (tagPacker != null) {
childTagPackerString = " childTagPacker=\"" + tagPacker.getClass().getSimpleName() +
"(" + tagPacker.getPackedLength() + ")\"";
} else {
childTagPackerString = "";
}
return childTagPackerString;
}
protected String getLenString(MsgField msgField) {
String lenString;
if (msgField.getLen() != null) {
lenString = " len=\"" + msgField.getLen().toString() + "\"";
} else {
lenString = "";
}
return lenString;
}
protected String getMaxLenString(MsgField msgField) {
String maxLenString;
if (msgField.getMaxLen() != null) {
maxLenString = " maxLen=\"" + msgField.getMaxLen().toString() + "\"";
} else {
maxLenString = "";
}
return maxLenString;
}
protected String getBodyPackerString(MsgField msgField) {
String result = null;
if (msgField.getBodyPacker() != null) {
result = msgField.getBodyPacker().getClass().getSimpleName();
}
return result == null ? "" : " bodyPacker=\"" + result + "\"";
}
@Override
public void dumpMsgValue(MsgField msgField, MsgValue msgValue, PrintStream printStream, String indent,
String indentForChildren, boolean maskPrivateData) {
if (msgField != null && !Objects.equals(msgField.getName(), msgValue.getName())) {
msgValue = navigator.synchronizeMessageValue(msgField, msgValue);
}
navigator.validateSameNamesAndTags(new MsgPair(msgField, msgValue));
if (indent == null) {
indent = "";
}
if (StringUtils.isEmpty(indentForChildren)) {
indentForChildren = FOR_SPACES;
}
if (maskPrivateData && msgField == null) {
throw new PackerRuntimeException("Argument msgField cannot be 'null' when argument maskPrivateData is 'true'." +
" It used for masking of sensitive private data from the msgValue");
}
Masker masker = null;
if (msgField != null) {
masker = msgField.getMasker();
}
String valueHexString = getHexValueString(msgValue, maskPrivateData, masker);
String valueString = getValueString(msgField, msgValue, maskPrivateData, masker);
if (valueString.length() > 0 && valueHexString.length() > 0 &&
valueString.substring(VAL_ATTRIBUTE_PREFIX.length()).equals(valueHexString.substring(VAL_HEX_ATTRIBUTE_PREFIX.length()))) {
// do not print the same values of val and valHex.
valueHexString = "";
}
String fieldNumString = getAttributeString(msgValue.getFieldNum(), " fieldNum=\"");
String tagString = getAttributeString(msgValue.getTag(), " tag=\"");
String nameString = getAttributeString(msgValue.getName(), " name=\"");
String bitmapString = createBitmapString(msgField, msgValue);
String bitSetString = createBitSetString(msgField, msgValue);
String tagHexString = getTagHexString(msgValue);
String lenHexString = getLenHexString(msgValue);
String content;
String numNameValue = nameString + fieldNumString + tagString + valueString + bitmapString + bitSetString;
if (msgField != null) {
switch (msgField.getType()) {
case LEN_TAG_VAL:
case LEN_VAL:
case BIT_SET:
content = numNameValue + lenHexString + tagHexString + valueHexString;
break;
default: // TAG_LEN_VAL and others
content = numNameValue + tagHexString + lenHexString + valueHexString;
break;
}
} else {
content = numNameValue + tagHexString + lenHexString + valueHexString;
}
printContent(msgField, msgValue, printStream, indent, indentForChildren, maskPrivateData, content);
}
protected String getAttributeString(Object object, String attribute) {
return object == null ? "" : attribute + object + "\"";
}
protected String getValueString(MsgField msgField, MsgValue msgValue, boolean maskPrivateData, Masker masker) {
String valueString;
if (msgField != null) {
valueString = getValueString(msgValue, maskPrivateData, masker, msgField.getStringer());
} else {
valueString = getValueString(msgValue, false, null, StringStringer.getInstance());
}
return valueString;
}
protected String getHexValueString(MsgValue msgValue, boolean maskPrivateData, Masker masker) {
String valueHexString;
if (msgValue.getChildren() == null || msgValue.getChildren().isEmpty()) {
valueHexString = maskBodyBytes(msgValue, maskPrivateData, masker);
} else {
valueHexString = "";
}
return valueHexString;
}
protected String createBitmapString(MsgField msgField, MsgValue msgValue) {
String bitmapString;
BitSet bitSet = msgValue.getBitSet();
if (msgField != null && bitSet != null) {
byte[] bitmapHeader = BitmapService.bitSet2byte(bitSet, msgField.getBitMapPacker().getPackedBytesLength());
bitmapString = " bitmapHex=\"" + HexService.bytesToHex(bitmapHeader) + "\"";
} else {
bitmapString = "";
}
return bitmapString;
}
protected String createBitSetString(MsgField msgField, MsgValue msgValue) {
String bitSetString;
if (msgField != null && msgValue.getBitSet() != null) {
BitSet bitSet = msgValue.getBitSet();
bitSetString = " bitSet=\"" + bitSet + "\"";
} else {
bitSetString = "";
}
return bitSetString;
}
protected String getLenHexString(MsgValue msgValue) {
String length = null;
if (msgValue != null && msgValue.getLengthBytes() != null) {
length = HexService.bytesToHex(msgValue.getLengthBytes());
}
return length == null ? "" : (" lenHex=\"" + length + "\"");
}
protected String getTagHexString(MsgValue msgValue) {
String tag = null;
if (msgValue != null && msgValue.getTagBytes() != null) {
tag = HexService.bytesToHex(msgValue.getTagBytes());
}
return tag == null ? "" : (" tagHex=\"" + tag + "\"");
}
protected String getValueString(MsgValue msgValue, boolean maskPrivateData, Masker masker, Stringer stringer) {
if (msgValue.getChildren() != null || msgValue.getBodyValue() == null) {
return "";
}
return VAL_ATTRIBUTE_PREFIX + maskValue(msgValue, maskPrivateData, masker, stringer) + "\"";
}
protected String maskValue(MsgValue msgValue, boolean maskPrivateData, Masker masker, Stringer stringer) {
Object bodyValue = msgValue.getBodyValue();
if (maskPrivateData && masker != null) {
return masker.maskValue(bodyValue);
}
return stringer.convert(bodyValue);
}
protected String maskBodyBytes(MsgValue msgValue, boolean maskPrivateData, Masker masker) {
String valueHex = null;
if (msgValue.getBodyBytes() != null) {
String hex = HexService.bytesToHex(msgValue.getBodyBytes());
if (maskPrivateData && masker != null) {
hex = masker.maskHex(hex);
}
valueHex = hex;
}
return valueHex == null ? "" : (VAL_HEX_ATTRIBUTE_PREFIX + valueHex + "\"");
}
protected void printContent(MsgField msgField, MsgValue msgValue, PrintStream printStream, String indent,
String indentForChildren, boolean maskPrivateData, String content) {
printStream.print(indent + "");
List list = msgField.getChildren();
for (MsgValue childMsgValue : msgValue.getChildren()) {
MsgField childMsgField = navigator.findByName(list, childMsgValue.getName());
dumpMsgValue(childMsgField, childMsgValue, printStream, indent + indentForChildren, indentForChildren, maskPrivateData);
}
printStream.println(indent + "");
} else {
printStream.println("/>");
}
}
@Override
public void setNavigator(Navigator navigator) {
this.navigator = navigator;
}
}