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/Date4ParseInfo.java

@@ -0,0 +1,64 @@
+package com.solab.iso8583.parse;
+
+import java.text.ParseException;
+import java.util.Calendar;
+import java.util.Date;
+
+import com.solab.iso8583.CustomField;
+import com.solab.iso8583.IsoType;
+import com.solab.iso8583.IsoValue;
+
+/** This class is used to parse fields of type DATE4.
+ * 
+ * @author Enrique Zamudio
+ */
+public class Date4ParseInfo extends FieldParseInfo {
+
+	public Date4ParseInfo() {
+		super(IsoType.DATE4, 4);
+	}
+
+	@Override
+	public <T> 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+4 > buf.length) {
+			throw new ParseException(String.format("Insufficient data for DATE4 field, pos %d", pos), pos);
+		}
+		Calendar cal = Calendar.getInstance();
+		cal.set(Calendar.HOUR, 0);
+		cal.set(Calendar.MINUTE, 0);
+		cal.set(Calendar.SECOND, 0);
+		//Set the month in the date
+		cal.set(Calendar.MONTH, ((buf[pos] - 48) * 10) + buf[pos + 1] - 49);
+		cal.set(Calendar.DATE, ((buf[pos + 2] - 48) * 10) + buf[pos + 3] - 48);
+		if (cal.getTime().after(new Date())) {
+			cal.add(Calendar.YEAR, -1);
+		}
+		return new IsoValue<Date>(type, cal.getTime(), null);
+	}
+
+	@Override
+	public <T> IsoValue<?> parseBinary(byte[] buf, int pos,
+			CustomField<T> custom) throws ParseException {
+		int[] tens = new int[2];
+		int start = 0;
+		for (int i = pos; i < pos + tens.length; i++) {
+			tens[start++] = (((buf[i] & 0xf0) >> 4) * 10) + (buf[i] & 0x0f);
+		}
+		Calendar cal = Calendar.getInstance();
+		cal.set(Calendar.HOUR, 0);
+		cal.set(Calendar.MINUTE, 0);
+		cal.set(Calendar.SECOND, 0);
+		//Set the month in the date
+		cal.set(Calendar.MONTH, tens[0] - 1);
+		cal.set(Calendar.DATE, tens[1]);
+		if (cal.getTime().after(new Date())) {
+			cal.add(Calendar.YEAR, -1);
+		}
+		return new IsoValue<Date>(type, cal.getTime(), null);
+	}
+
+}