001    package railo.transformer.bytecode.op;
002    
003    import org.objectweb.asm.Label;
004    import org.objectweb.asm.Opcodes;
005    import org.objectweb.asm.Type;
006    import org.objectweb.asm.commons.GeneratorAdapter;
007    
008    import railo.transformer.bytecode.BytecodeContext;
009    import railo.transformer.bytecode.BytecodeException;
010    import railo.transformer.bytecode.cast.CastBoolean;
011    import railo.transformer.bytecode.expression.ExprBoolean;
012    import railo.transformer.bytecode.expression.Expression;
013    import railo.transformer.bytecode.expression.ExpressionBase;
014    import railo.transformer.bytecode.util.ExpressionUtil;
015    import railo.transformer.bytecode.util.Types;
016    
017    public final class OpContional extends ExpressionBase {
018    
019        private ExprBoolean cont;
020        private Expression left;
021        private Expression right;
022    
023        /**
024         *
025         * @see railo.transformer.bytecode.expression.ExpressionBase#_writeOut(org.objectweb.asm.commons.GeneratorAdapter, int)
026         */
027        public Type _writeOut(BytecodeContext bc, int mode) throws BytecodeException {
028            GeneratorAdapter adapter = bc.getAdapter();
029            
030            
031            Label yes = new Label();
032            Label end = new Label();
033            
034            // cont
035            ExpressionUtil.visitLine(bc, cont.getStart());
036            cont.writeOut(bc, MODE_VALUE);
037            ExpressionUtil.visitLine(bc, cont.getEnd());
038            adapter.visitJumpInsn(Opcodes.IFEQ, yes);
039            
040            // left
041            ExpressionUtil.visitLine(bc, left.getStart());
042            left.writeOut(bc, MODE_REF);
043            ExpressionUtil.visitLine(bc, left.getEnd());
044            adapter.visitJumpInsn(Opcodes.GOTO, end);
045            
046            // right
047            ExpressionUtil.visitLine(bc, right.getStart());
048            adapter.visitLabel(yes);
049            right.writeOut(bc, MODE_REF);
050            ExpressionUtil.visitLine(bc, right.getEnd());
051            adapter.visitLabel(end);
052            
053            return Types.OBJECT;
054            
055        }
056        
057    
058        
059        
060        
061        
062        
063        private OpContional(Expression cont, Expression left, Expression right) {
064            super(left.getStart(),right.getEnd());
065            this.cont=CastBoolean.toExprBoolean(cont);
066            this.left=left;  
067            this.right=right;  
068        }
069        
070    
071        public static Expression toExpr(Expression cont, Expression left, Expression right) {
072            return new OpContional(cont,left,right);
073        }
074        
075    
076        /* *
077         * @see railo.transformer.bytecode.expression.Expression#getType()
078         * /
079        public int getType() {
080            return Types._BOOLEAN;
081        }*/
082    }
083