Bug correction : For write parsers, the write variable name must be readed in...

Bug correction : For write parsers, the write variable name must be readed in the constructor before the expresions are initialized.

pom.xml

@@ -12,7 +12,7 @@
 	
 	<groupId>fr.soleil.deviceservers</groupId>
 	<artifactId>TangoParser</artifactId>
-	<version>3.3.7</version>
+	<version>3.3.8</version>
 	<name>TangoParser</name>
 	<description>TangoParser Device</description>
 	

src/main/java/fr/soleil/tango/parser/JepParserWrite.java

@@ -47,6 +47,19 @@ public final class JepParserWrite extends AJepParser {
 		super(deviceName, name, expression, variables, variablesJepToRead, dataSource);
 		this.expression = expression.trim();
 		this.variables = variables;
+		int equalIndex = expression.indexOf('=');
+		if (equalIndex < 1) {
+			// The equal symbol cannot be absent or the first character.
+			throw DevFailedUtils.newDevFailed("The equal symbol cannot be absent or the first character.",
+					"The symbol '=' is absent or is the first character.\nThe expression should be like x = f(y).");
+		}
+		resultSymbol = expression.substring(0, equalIndex).trim();
+		if (resultSymbol.isEmpty()) {
+			// The result symbol is the name of the writer, it's mandatory.
+			throw DevFailedUtils.newDevFailed("The result symbol is missing.",
+					"A result symbol is required before the '='.");
+		}
+		logger.debug("resultSymbol is {} for {} ", resultSymbol, expression);
 	}
 
 	@Override