/**
*
*/
package ognl;
import ognl.enhance.UnsupportedCompilationException;
/**
* Base class for boolean expressions.
*
* @author jkuhnert
*/
public abstract class BooleanExpression extends ExpressionNode implements NodeType
{
protected Class _getterClass;
public BooleanExpression(int id) {
super(id);
}
public BooleanExpression(OgnlParser p, int id) {
super(p, id);
}
public Class getGetterClass()
{
return _getterClass;
}
public Class getSetterClass()
{
return null;
}
public String toGetSourceString(OgnlContext context, Object target)
{
try {
Object value = getValueBody(context, target);
if (value != null && Boolean.class.isAssignableFrom(value.getClass()))
_getterClass = Boolean.TYPE;
else if (value != null)
_getterClass = value.getClass();
else
_getterClass = Boolean.TYPE;
String ret = super.toGetSourceString(context, target);
if ("(false)".equals(ret))
return "false";
else if ("(true)".equals(ret))
return "true";
return ret;
} catch (NullPointerException e) {
// expected to happen in some instances
e.printStackTrace();
throw new UnsupportedCompilationException("evaluation resulted in null expression.");
} catch (Throwable t)
{
throw OgnlOps.castToRuntime(t);
}
}
}