ca.uhn.hl7v2.hoh.encoder.EncodingStyle Maven / Gradle / Ivy
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package ca.uhn.hl7v2.hoh.encoder;
import java.util.HashMap;
import java.util.Map;
public enum EncodingStyle {
/**
*
* ER7 (Pipe and Hat, or Vertical Bar encoding)
*
*
* Content type: application/hl7-v2
*
*/
ER7("application/hl7-v2"),
/**
*
* XML encoding
*
*
* Content type: application/hl7-v2+xml
*
*/
XML("application/hl7-v2+xml");
private static final Map ourContentTypeToEncodingStyles = new HashMap<>();
static {
for (EncodingStyle next : values()) {
ourContentTypeToEncodingStyles.put(next.myContentType, next);
}
}
private final String myContentType;
EncodingStyle(String theContentType) {
myContentType = theContentType;
}
/**
* Returns the encoding style (e.g. ER7) for a given content type (e.g.
* application/hl7-v2), or null if content type does not match
* an HL7 definition.
*
* @param theContentType
* The content type (case insensitive)
* @return Returns null if no matching
* @throws NullPointerException
* If theContentType is null
*/
public static EncodingStyle getEncodingStyleForContentType(String theContentType) {
return ourContentTypeToEncodingStyles.get(theContentType.toLowerCase());
}
/**
* Detect the encoding style of a given message
*
* @throws NullPointerException If theMessage is null
* @throws IllegalArgumentException If the message is not ER7 or XML
*/
public static EncodingStyle detect(String theMessage) {
if (theMessage == null) {
throw new NullPointerException("Message can not be null");
}
for (int i = 0; i < theMessage.length(); i++) {
char nextChar = theMessage.charAt(i);
if (Character.isLetter(nextChar)) {
return ER7;
}
if (Character.isWhitespace(nextChar)) {
continue;
}
if (nextChar == '<') {
return XML;
}
}
throw new IllegalArgumentException("Message does not appear to be ER7 or XML");
}
/**
* Returns the MIME type (content-type) associated with this encoding
*/
public String getContentType() {
return myContentType;
}
}