feat: use appropriate methods to convert the numbers in XML

Conversion of the numbers using appropriate methods of each different type.

ING-3965

io/plugins/eu.esdihumboldt.hale.io.gml/src/eu/esdihumboldt/hale/io/gml/internal/simpletype/SimpleTypeUtil.java

@@ -16,6 +16,8 @@
 
 package eu.esdihumboldt.hale.io.gml.internal.simpletype;
 
+import java.math.BigDecimal;
+import java.text.DecimalFormat;
 import java.util.ArrayList;
 import java.util.Calendar;
 import java.util.HashMap;
@@ -29,6 +31,11 @@
 import org.apache.xmlbeans.XmlAnySimpleType;
 import org.apache.xmlbeans.XmlDate;
 import org.apache.xmlbeans.XmlDateTime;
+import org.apache.xmlbeans.XmlDecimal;
+import org.apache.xmlbeans.XmlDouble;
+import org.apache.xmlbeans.XmlFloat;
+import org.apache.xmlbeans.XmlInteger;
+import org.apache.xmlbeans.XmlLong;
 import org.apache.xmlbeans.XmlTime;
 import org.springframework.core.convert.ConversionException;
 import org.springframework.core.convert.ConversionService;
@@ -62,6 +69,12 @@ public class SimpleTypeUtil {
 		TYPE_MAP.put("dateTime", XmlDateTime.class); //$NON-NLS-1$
 		TYPE_MAP.put("date", XmlDate.class); //$NON-NLS-1$
 		TYPE_MAP.put("time", XmlTime.class); //$NON-NLS-1$
+
+		TYPE_MAP.put("integer", XmlInteger.class); //$NON-NLS-1$
+		TYPE_MAP.put("float", XmlFloat.class); //$NON-NLS-1$
+		TYPE_MAP.put("double", XmlDouble.class); //$NON-NLS-1$
+		TYPE_MAP.put("long", XmlLong.class); //$NON-NLS-1$
+		TYPE_MAP.put("decimal", XmlDecimal.class); //$NON-NLS-1$
 	}
 
 	/**
@@ -119,6 +132,31 @@ else if (simpleTypeValue instanceof XmlDateTime) {
 			}
 		}
 
+		if (value instanceof BigDecimal) {
+			// Create a DecimalFormat object without scientific notation
+			DecimalFormat decimalFormat = new DecimalFormat("0.##############");
+			// Format the BigDecimal
+			return decimalFormat.format(value);
+		}
+		else
+		// Handle primitive types
+		if (value instanceof Double || value instanceof Float || value instanceof Long
+				|| value instanceof Integer) {
+			return String.valueOf(value);
+		}
+		else if (value instanceof XmlAnySimpleType) {
+			Number numberValue = (Number) value;
+			if (value instanceof XmlDouble || value instanceof XmlFloat || value instanceof XmlLong
+					|| value instanceof XmlInteger) {
+				// Return the string value of the number
+				return String.valueOf(numberValue);
+			}
+			else if (value instanceof XmlDecimal) {
+				BigDecimal decimalValue = ((XmlDecimal) value).getBigDecimalValue();
+				return decimalValue.stripTrailingZeros().toPlainString();
+			}
+		}
+
 		// try to convert to string
 		try {
 			String stringValue = conversionService.convert(value, String.class);