FieldParseInfo is now an abstract class, with a concrete subclass for each IsoType. This greatly improves the parsing speed.

git-svn-id: https://j8583.svn.sourceforge.net/svnroot/j8583/j8583@66 db60a039-f72e-0410-b1d2-baa000846441

src/main/java/com/solab/iso8583/parse/AlphaNumericFieldParseInfo.java

@@ -0,0 +1,39 @@
+package com.solab.iso8583.parse;
+
+import java.text.ParseException;
+
+import com.solab.iso8583.CustomField;
+import com.solab.iso8583.IsoType;
+import com.solab.iso8583.IsoValue;
+
+/** This is the common abstract superclass to parse ALPHA and NUMERIC field types.
+ * 
+ * @author Enrique Zamudio
+ */
+public abstract class AlphaNumericFieldParseInfo extends FieldParseInfo {
+
+	public AlphaNumericFieldParseInfo(IsoType t, int len) {
+		super(t, len);
+	}
+
+	public <T extends Object> IsoValue<?> parse(byte[] buf, int pos, CustomField<T> custom) throws ParseException {
+		if (pos < 0) {
+			throw new ParseException(String.format("Invalid position %d", pos), pos);
+		}
+		if (pos+length > buf.length) {
+			throw new ParseException(String.format("Insufficient data for %s field of length %d, pos %d",
+				type, length, pos), pos);
+		}
+		if (custom == null) {
+			System.out.printf("Parseando tipo %s largo %s pos %s: '%s'%n", type, length, pos, new String(buf, pos, length));
+			return new IsoValue<String>(type, new String(buf, pos, length), length, null);
+		} else {
+			IsoValue<T> v = new IsoValue<T>(type, custom.decodeField(new String(buf, pos, length)), length, custom);
+			if (v.getValue() == null) {
+				return new IsoValue<String>(type, new String(buf, pos, length), length, null);
+			}
+			return v;
+		}
+	}
+
+}