/**
* Copyright (C) 2010 dennis zhuang (killme2008@gmail.com)
*
* This library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
**/
package com.googlecode.aviator.runtime.type;
import java.util.Map;
import com.googlecode.aviator.exception.ExpressionRuntimeException;
/**
* Aviator boolean type
*
* @author dennis
*
*/
public class AviatorBoolean extends AviatorObject {
Boolean value;
public static final AviatorBoolean TRUE = new AviatorBoolean(Boolean.TRUE);
public static final AviatorBoolean FALSE = new AviatorBoolean(Boolean.FALSE);
@Override
public AviatorObject not(Map<String, Object> env) {
return this.value.booleanValue() ? FALSE : TRUE;
}
@Override
public final boolean booleanValue(Map<String, Object> env) {
return value.booleanValue();
}
@Override
public AviatorObject add(AviatorObject other, Map<String, Object> env) {
switch (other.getAviatorType()) {
case String:
return new AviatorString(this.value.toString() + ((AviatorString) other).lexeme);
case JavaType:
AviatorJavaType javaType = (AviatorJavaType) other;
final Object otherJavaValue = javaType.getValue(env);
if (otherJavaValue instanceof String || otherJavaValue instanceof Character) {
return new AviatorString(this.value.toString() + otherJavaValue.toString());
}
else {
return super.add(other, env);
}
default:
return super.add(other, env);
}
}
@Override
public AviatorType getAviatorType() {
return AviatorType.Boolean;
}
@Override
public final Object getValue(Map<String, Object> env) {
return this.value;
}
private AviatorBoolean(Boolean value) {
super();
this.value = value;
}
public static AviatorBoolean valueOf(boolean b) {
return b ? AviatorBoolean.TRUE : AviatorBoolean.FALSE;
}
@Override
public int compare(AviatorObject other, Map<String, Object> env) {
switch (other.getAviatorType()) {
case Boolean:
AviatorBoolean otherBoolean = (AviatorBoolean) other;
return this.value.compareTo(otherBoolean.value);
case JavaType:
AviatorJavaType javaType = (AviatorJavaType) other;
final Object otherValue = javaType.getValue(env);
if (otherValue == null) {
return 1;
}
if (otherValue instanceof Boolean) {
return this.value.compareTo((Boolean) otherValue);
}
else {
throw new ExpressionRuntimeException("Could not compare " + desc(env) + " with " + other.desc(env));
}
case Nil:
return 1;
default:
throw new ExpressionRuntimeException("Could not compare " + this.desc(env) + " with " + other.desc(env));
}
}
}