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package com.sun.el.parser;
import java.math.BigDecimal;
import java.math.BigInteger;
import javax.el.ELException;
import com.sun.el.lang.EvaluationContext;
/**
* @author Jacob Hookom [[email protected]]
* @version $Change: 181177 $$DateTime: 2001/06/26 08:45:09 $$Author: tcfujii $
*/
public final class AstNegative extends SimpleNode {
public AstNegative(int id) {
super(id);
}
public Class getType(EvaluationContext ctx)
throws ELException {
return Number.class;
}
public Object getValue(EvaluationContext ctx)
throws ELException {
Object obj = this.children[0].getValue(ctx);
if (obj == null) {
return Long.valueOf(0);
}
if (obj instanceof BigDecimal) {
return ((BigDecimal) obj).negate();
}
if (obj instanceof BigInteger) {
return ((BigInteger) obj).negate();
}
if (obj instanceof String) {
if (isStringFloat((String) obj)) {
return Double.valueOf(-Double.parseDouble((String) obj));
}
return Long.valueOf(-Long.parseLong((String) obj));
}
Class type = obj.getClass();
if (obj instanceof Long || Long.TYPE == type) {
return Long.valueOf(-((Long) obj).longValue());
}
if (obj instanceof Double || Double.TYPE == type) {
return Double.valueOf(-((Double) obj).doubleValue());
}
if (obj instanceof Integer || Integer.TYPE == type) {
return Integer.valueOf(-((Integer) obj).intValue());
}
if (obj instanceof Float || Float.TYPE == type) {
return Float.valueOf(-((Float) obj).floatValue());
}
if (obj instanceof Short || Short.TYPE == type) {
return Short.valueOf((short) -((Short) obj).shortValue());
}
if (obj instanceof Byte || Byte.TYPE == type) {
return Byte.valueOf((byte) -((Byte) obj).byteValue());
}
Long num = (Long) coerceToNumber(obj, Long.class);
return Long.valueOf(-num.longValue());
}
}