package railo.transformer.bytecode.cast;
import org.objectweb.asm.Type;
import org.objectweb.asm.commons.GeneratorAdapter;
import org.objectweb.asm.commons.Method;
import railo.runtime.exp.TemplateException;
import railo.transformer.bytecode.BytecodeContext;
import railo.transformer.bytecode.BytecodeException;
import railo.transformer.bytecode.Literal;
import railo.transformer.bytecode.expression.ExprBoolean;
import railo.transformer.bytecode.expression.ExprDouble;
import railo.transformer.bytecode.expression.ExprString;
import railo.transformer.bytecode.expression.Expression;
import railo.transformer.bytecode.expression.ExpressionBase;
import railo.transformer.bytecode.literal.LitBoolean;
import railo.transformer.bytecode.util.Methods;
import railo.transformer.bytecode.util.Types;
/**
* Cast to a Boolean
*/
public final class CastBoolean extends ExpressionBase implements ExprBoolean,Cast {
/**
* @see java.lang.Object#toString()
*/
public String toString() {
return "(boolean)"+expr;
}
private Expression expr;
/**
* constructor of the class
* @param expr
*/
private CastBoolean(Expression expr) {
super(expr.getStart(),expr.getEnd());
this.expr=expr;
}
/**
* Create a String expression from a Expression
* @param expr
* @return String expression
* @throws TemplateException
*/
public static ExprBoolean toExprBoolean(Expression expr) {
if(expr instanceof ExprBoolean) return (ExprBoolean) expr;
if(expr instanceof Literal) {
Boolean bool = ((Literal)expr).getBoolean(null);
if(bool!=null) return new LitBoolean(bool.booleanValue(),expr.getStart(),expr.getEnd());
// TODO throw new TemplateException("can't cast value to a boolean value");
}
return new CastBoolean(expr);
}
/**
* @see railo.transformer.bytecode.expression.Expression#writeOut(org.objectweb.asm.commons.GeneratorAdapter, int)
*/
public Type _writeOut(BytecodeContext bc, int mode) throws BytecodeException {
GeneratorAdapter adapter = bc.getAdapter();
if(expr instanceof ExprDouble) {
expr.writeOut(bc,MODE_VALUE);
if(mode==MODE_VALUE)adapter.invokeStatic(Types.CASTER,Methods.METHOD_TO_BOOLEAN_VALUE_FROM_DOUBLE);
else adapter.invokeStatic(Types.CASTER,Methods.METHOD_TO_BOOLEAN_FROM_DOUBLE);
}
else if(expr instanceof ExprString) {
expr.writeOut(bc,MODE_REF);
if(mode==MODE_VALUE)adapter.invokeStatic(Types.CASTER,Methods.METHOD_TO_BOOLEAN_VALUE_FROM_STRING);
else adapter.invokeStatic(Types.CASTER,Methods.METHOD_TO_BOOLEAN_FROM_STRING);
}
else {
Type rtn = expr.writeOut(bc,mode);
if(mode==MODE_VALUE) {
if(!Types.isPrimitiveType(rtn)) {
adapter.invokeStatic(Types.CASTER,Methods.METHOD_TO_BOOLEAN_VALUE);
}
else if(Types.BOOLEAN_VALUE.equals(rtn)) {}
else if(Types.DOUBLE_VALUE.equals(rtn)) {
adapter.invokeStatic(Types.CASTER,Methods.METHOD_TO_BOOLEAN_VALUE_FROM_DOUBLE);
}
else {
adapter.invokeStatic(Types.CASTER,new Method("toRef",Types.toRefType(rtn),new Type[]{rtn}));
adapter.invokeStatic(Types.CASTER,Methods.METHOD_TO_BOOLEAN_VALUE);
}
//return Types.BOOLEAN_VALUE;
}
else {
if(Types.BOOLEAN.equals(rtn)) {}
else adapter.invokeStatic(Types.CASTER,Methods.METHOD_TO_BOOLEAN);
}
}
if(mode==MODE_VALUE)return Types.BOOLEAN_VALUE;
return Types.BOOLEAN;
}
@Override
public Expression getExpr() {
return expr;
}
}