AJ-543: duration support exchange calendar

Author: lucaijun

src/com/xxdb/data/BasicDuration.java

@@ -14,10 +14,21 @@ public class BasicDuration extends AbstractScalar implements Comparable<BasicDur
 
 	public BasicDuration(DURATION unit, int value){
 		this.value = value;
+		if (unit == DURATION.TDAY)
+			throw new RuntimeException("the exchange unit should be given when use exchange calendar.");
 		this.unit = unit;
 		this.exchange_ = unit.ordinal();
 	}
 
+	public BasicDuration(DURATION unit, int value, String exchangeUnit) {
+		this.value = value;
+		this.unit = unit;
+		if (this.unit == DURATION.TDAY)
+			this.exchange_ = getCodeNumber(exchangeUnit);
+		else
+			this.exchange_ = this.unit.ordinal();
+	}
+
 	public BasicDuration(String unit, int value) {
 		this.value = value;
 		int codeNumber = getCodeNumber(unit);
@@ -179,6 +190,8 @@ private int getCodeNumber(String unit) {
 		} else if (unit.length() == 4) {
 			int[] codes = new int[4];
 			for (int i = 0; i < 4; i++) {
+				if (Character.isLowerCase(unit.charAt(i)))
+					throw new RuntimeException("the exchange unit except all upper, got " + unit);
 				codes[i] = unit.charAt(i);
 			}
 			return (codes[0] << 24) + (codes[1] << 16) + (codes[2] << 8) + codes[3];