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Fixed accidental use of JDK 1.7+ Integer/Long.compare methods 

Issue: SPR-11319
This commit is contained in:
Juergen Hoeller 2014-01-16 16:54:40 +01:00
parent 11bc9d0aeb
commit 838855b1aa
1 changed files with 36 additions and 29 deletions
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65
spring-expression/src/main/java/org/springframework/expression/spel/support/StandardTypeComparator.java
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@ -24,8 +24,8 @@ import org.springframework.expression.spel.SpelMessage;
import org.springframework.util.NumberUtils;
/**
* A simple basic TypeComparator implementation. It supports comparison of numbers and
* types implementing Comparable.
* A simple basic {@link TypeComparator} implementation.
* It supports comparison of Numbers and types implementing Comparable.
*
* @author Andy Clement
* @author Juergen Hoeller
@ -34,15 +34,29 @@ import org.springframework.util.NumberUtils;
*/
public class StandardTypeComparator implements TypeComparator {
@Override
public boolean canCompare(Object left, Object right) {
if (left == null || right == null) {
return true;
}
if (left instanceof Number && right instanceof Number) {
return true;
}
if (left instanceof Comparable) {
return true;
}
return false;
}
@Override
@SuppressWarnings("unchecked")
public int compare(Object left, Object right) throws SpelEvaluationException {
// If one is null, check if the other is
if (left == null) {
return right == null ? 0 : -1;
return (right == null ? 0 : -1);
}
else if (right == null) {
return 1; // left cannot be null
return 1; // left cannot be null at this point
}
// Basic number comparisons
@ -55,48 +69,41 @@ public class StandardTypeComparator implements TypeComparator {
BigDecimal rightBigDecimal = NumberUtils.convertNumberToTargetClass(rightNumber, BigDecimal.class);
return leftBigDecimal.compareTo(rightBigDecimal);
}
if (leftNumber instanceof Double || rightNumber instanceof Double) {
else if (leftNumber instanceof Double || rightNumber instanceof Double) {
return Double.compare(leftNumber.doubleValue(), rightNumber.doubleValue());
}
if (leftNumber instanceof Float || rightNumber instanceof Float) {
else if (leftNumber instanceof Float || rightNumber instanceof Float) {
return Float.compare(leftNumber.floatValue(), rightNumber.floatValue());
}
if (leftNumber instanceof Long || rightNumber instanceof Long) {
return Long.compare(leftNumber.longValue(), rightNumber.longValue());
else if (leftNumber instanceof Long || rightNumber instanceof Long) {
// Don't call Long.compare here - only available on JDK 1.7+
return compare(leftNumber.longValue(), rightNumber.longValue());
}
else {
// Don't call Integer.compare here - only available on JDK 1.7+
return compare(leftNumber.intValue(), rightNumber.intValue());
}
return Integer.compare(leftNumber.intValue(), rightNumber.intValue());
}
try {
if (left instanceof Comparable) {
return ((Comparable<Object>) left).compareTo(right);
return ((Comparable) left).compareTo(right);
}
} catch (ClassCastException cce) {
throw new SpelEvaluationException(cce, SpelMessage.NOT_COMPARABLE, left.getClass(), right.getClass());
}
catch (ClassCastException ex) {
throw new SpelEvaluationException(ex, SpelMessage.NOT_COMPARABLE, left.getClass(), right.getClass());
}
throw new SpelEvaluationException(SpelMessage.NOT_COMPARABLE, left.getClass(), right.getClass());
}
@Override
public boolean canCompare(Object left, Object right) {
if (left == null || right == null) {
return true;
}
if (left instanceof Number && right instanceof Number) {
return true;
}
private static int compare(int x, int y) {
return (x < y ? -1 : (x > y ? 1 : 0));
}
if (left instanceof Comparable) {
return true;
}
return false;
private static int compare(long x, long y) {
return (x < y ? -1 : (x > y ? 1 : 0));
}
}