/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 org.apache.camel.component.quickfixj.examples.transform;
import java.util.Iterator;
import quickfix.ConfigError;
import quickfix.DataDictionary;
import quickfix.Field;
import quickfix.FieldMap;
import quickfix.FieldNotFound;
import quickfix.FieldType;
import quickfix.Group;
import quickfix.Message;
import quickfix.MessageUtils;
import quickfix.Session;
import quickfix.SessionID;
public class QuickfixjMessageJsonTransformer {
public String transform(Message message) throws FieldNotFound, ConfigError {
SessionID sessionID = MessageUtils.getSessionID(message);
Session session = Session.lookupSession(sessionID);
DataDictionary dataDictionary = session.getDataDictionary();
if (dataDictionary == null) {
throw new IllegalStateException("No Data Dictionary. Exchange must reference an existing session");
}
return transform(message, dataDictionary);
}
public String transform(Message message, DataDictionary dataDictionary) {
return transform(message, "", dataDictionary);
}
public String transform(Message message, String indent, DataDictionary dd) {
StringBuilder sb = new StringBuilder();
sb.append(indent).append("\"message\": ");
if (message == null) {
sb.append("null");
} else {
sb.append("{\n");
String contentIndent = indent + " ";
transform("header", message.getHeader(), sb, contentIndent, dd);
sb.append("\n");
transform("body", message, sb, contentIndent, dd);
sb.append("\n");
transform("trailer", message.getTrailer(), sb, contentIndent, dd);
sb.append("\n");
sb.append(indent).append("}");
}
return sb.toString();
}
private void transform(String name, FieldMap fieldMap, StringBuilder sb, String indent, DataDictionary dd) {
sb.append(indent).append("\"").append(name).append("\": {\n");
int fieldCount = 0;
Iterator<Field<?>> fieldIterator = fieldMap.iterator();
while (fieldIterator.hasNext()) {
if (fieldCount > 0) {
sb.append(",\n");
}
Field<?> field = fieldIterator.next();
sb.append(indent).append(" \"").append(dd.getFieldName(field.getField())).append("\": ");
if (dd.hasFieldValue(field.getField())) {
int tag = field.getField();
sb.append("[ \"").append(field.getObject().toString()).append("\", \"").
append(dd.getValueName(tag, field.getObject().toString())).
append("\" ]");
} else {
FieldType fieldType = dd.getFieldTypeEnum(field.getField());
if (Number.class.isAssignableFrom(fieldType.getJavaType())) {
sb.append(field.getObject());
} else {
sb.append("\"").append(field.getObject().toString()).append("\"");
}
}
fieldCount++;
}
sb.append("\n");
Iterator<Integer> groupKeys = fieldMap.groupKeyIterator();
while (groupKeys.hasNext()) {
int groupTag = groupKeys.next();
for (Group group : fieldMap.getGroups(groupTag)) {
String groupName = dd.getFieldName(groupTag);
transform(groupName, group, sb, indent + " ", dd);
}
}
sb.append(indent).append("}").append("\n");
}
}