Package org.mvel2.ast

Examples of org.mvel2.ast.Function

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    private void buildMixinMethods( ClassWriter cw, String wrapperName, String mixin, Class mixinClass, Collection<Method> mixinMethods ) {
        for ( Method method : mixinMethods ) {
            String signature = TraitFactory.buildSignature( method );
            {
                MethodVisitor mv = cw.visitMethod( ACC_PUBLIC,
                        method.getName(),
                        signature,
                        null,
                        null );
                mv.visitCode();
                mv.visitVarInsn( ALOAD, 0 );
                mv.visitFieldInsn( GETFIELD, BuildUtils.getInternalType( wrapperName ), mixin, Type.getDescriptor(mixinClass) );
                int j = 1;
                for ( Class arg : method.getParameterTypes() ) {
                    mv.visitVarInsn( BuildUtils.varType( arg.getName() ), j++ );
                }
                mv.visitMethodInsn( INVOKEVIRTUAL,
                        Type.getInternalName(mixinClass),
                        method.getName(),
                        signature );

                mv.visitInsn( BuildUtils.returnType( method.getReturnType().getName() ) );
                int stack = TraitFactory.getStackSize( method ) ;
//                mv.visitMaxs( stack, stack );
                mv.visitMaxs( 0, 0 );
                mv.visitEnd();
            }
        }

    }
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        String fieldName = field.getName();
        String fieldType = field.getTypeName();

        String getter = BuildUtils.getterName( fieldName, fieldType );

        MethodVisitor mv = cw.visitMethod( ACC_PUBLIC, getter, "()" + BuildUtils.getTypeDescriptor( fieldType ), null, null );
        mv.visitCode();

        mv.visitVarInsn( ALOAD, 0 );
        mv.visitFieldInsn( GETFIELD, BuildUtils.getInternalType( proxy ), "object", Type.getDescriptor( core.getDefinedClass() ) );
        mv.visitTypeInsn( CHECKCAST, Type.getInternalName( TraitableBean.class ) );
        mv.visitMethodInsn( INVOKEINTERFACE, Type.getInternalName( TraitableBean.class ), "_getFieldTMS", Type.getMethodDescriptor( Type.getType( TraitFieldTMS.class ), new Type[] {} ) );

        mv.visitLdcInsn( field.resolveAlias() );
        if ( BuildUtils.isPrimitive( fieldType ) ) {
            //            mv.visitFieldInsn( GETSTATIC, BuildUtils.getInternalType( BuildUtils.box( fieldType ) ), "TYPE", Type.getDescriptor( Class.class ) );
            mv.visitLdcInsn( Type.getType( BuildUtils.getTypeDescriptor( BuildUtils.box( field.getTypeName() ) ) ) );
        } else {
            mv.visitLdcInsn( Type.getType( Type.getDescriptor( field.getType() ) ) );
        }
        mv.visitMethodInsn( INVOKEINTERFACE,
                            Type.getInternalName( TraitFieldTMS.class ),
                            "get",
                            Type.getMethodDescriptor( Type.getType( Object.class ), new Type[] { Type.getType( String.class ), Type.getType( Class.class ) } ) );

        mv.visitVarInsn( ASTORE, 1 );
        mv.visitVarInsn( ALOAD, 1 );

        if ( BuildUtils.isPrimitive( fieldType ) ) {
            Label l0 = new Label();
            mv.visitJumpInsn( IFNULL, l0 );
            mv.visitVarInsn( ALOAD, 1 );
            Label l1 = new Label();
            mv.visitJumpInsn( GOTO, l1 );
            mv.visitLabel( l0 );
            mv.visitInsn( BuildUtils.zero( fieldType ) );
            mv.visitMethodInsn( Opcodes.INVOKESTATIC,
                                BuildUtils.getInternalType( BuildUtils.box( fieldType ) ),
                                "valueOf",
                                Type.getMethodDescriptor( Type.getType( BuildUtils.getTypeDescriptor( BuildUtils.box( fieldType ) ) ), new Type[] { Type.getType( BuildUtils.getTypeDescriptor( fieldType ) ) } ) );
            mv.visitLabel( l1 );

            mv.visitTypeInsn( CHECKCAST, BuildUtils.getInternalType( BuildUtils.box( fieldType ) ) );
            mv.visitMethodInsn( INVOKEVIRTUAL,
                                BuildUtils.getInternalType( BuildUtils.box( fieldType ) ),
                                BuildUtils.numericMorph( BuildUtils.box( fieldType ) ),
                                Type.getMethodDescriptor( Type.getType( field.getType() ), new Type[] {} ) );
            mv.visitInsn( BuildUtils.returnType( fieldType ) );
        } else {
            mv.visitTypeInsn( CHECKCAST, BuildUtils.getInternalType( fieldType ) );
            mv.visitInsn( ARETURN );
        }

        mv.visitMaxs( 0, 0 );
        mv.visitEnd();
    }
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    protected void buildHardGetter( ClassVisitor cw, FieldDefinition field, String masterName, ClassDefinition proxy, ClassDefinition core, String getterName, boolean protect ) {       
        Class fieldType = field.getType();


        MethodVisitor mv = cw.visitMethod( protect ? ACC_PROTECTED : ACC_PUBLIC,
                getterName,
                "()" + Type.getDescriptor( fieldType ),
                null,
                null);
        mv.visitCode();

        TraitFactory.invokeExtractor( mv, masterName, proxy, core, field );

        if ( ! BuildUtils.isPrimitive( field.getTypeName() ) ) {
            mv.visitTypeInsn( CHECKCAST, Type.getInternalName( fieldType ) );
        }

        mv.visitInsn( BuildUtils.returnType ( fieldType.getName() ) );
//        mv.visitMaxs( 2, 1 );
        mv.visitMaxs( 0, 0 );
        mv.visitEnd();

    }
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    }

    protected void buildHardSetter( ClassVisitor cw, FieldDefinition field, String masterName, ClassDefinition trait, ClassDefinition core, String setterName, boolean protect ) {
        Class fieldType = field.getType();

        MethodVisitor mv = cw.visitMethod( protect ? ACC_PROTECTED : ACC_PUBLIC,
                                           setterName,
                                           "(" + Type.getDescriptor( field.getType() ) + ")V",
                                           null,
                                           null );
        mv.visitCode();

        if ( core.isFullTraiting() ) {
            // The trait field update will be done by the core setter. However, types may mismatch here
            FieldDefinition hardField = core.getFieldByAlias( field.resolveAlias() );
            if ( ! field.getType().isPrimitive() && ! field.getTypeName().equals( hardField.getTypeName() ) ) {
                boolean isCoreTrait = hardField.getType().getAnnotation( Trait.class ) != null;
                boolean isTraitTrait = field.getType().getAnnotation( Trait.class ) != null;

                Label l0 = new Label();
                mv.visitVarInsn( ALOAD, 1 );
                mv.visitJumpInsn( IFNULL, l0 );
                if ( isCoreTrait && ! isTraitTrait ) {
                    mv.visitVarInsn( ALOAD, 1 );
                    mv.visitTypeInsn( CHECKCAST, Type.getInternalName( TraitableBean.class ) );
                    mv.visitLdcInsn( hardField.getTypeName() );
                    mv.visitMethodInsn( INVOKEINTERFACE, Type.getInternalName( TraitableBean.class ), "getTrait", Type.getMethodDescriptor( Type.getType( Thing.class ), new Type[] { Type.getType( String.class ) } ) );
                    mv.visitVarInsn( ASTORE, 1 );
                } else if ( ! isCoreTrait && isTraitTrait ) {
                    mv.visitVarInsn( ALOAD, 1 );
                    mv.visitTypeInsn( CHECKCAST, Type.getInternalName( TraitProxy.class ) );
                    mv.visitMethodInsn( INVOKEVIRTUAL, Type.getInternalName( TraitProxy.class ), "getObject", Type.getMethodDescriptor( Type.getType( TraitableBean.class ), new Type[]{ } ) );
                    mv.visitVarInsn( ASTORE, 1 );
                } else if ( isCoreTrait && isTraitTrait ) {
                    mv.visitVarInsn( ALOAD, 1 );
                    mv.visitTypeInsn( CHECKCAST, Type.getInternalName( TraitProxy.class ) );
                    mv.visitMethodInsn( INVOKEVIRTUAL, Type.getInternalName( TraitProxy.class ), "getObject", Type.getMethodDescriptor( Type.getType( TraitableBean.class ), new Type[] {} ) );
                    mv.visitTypeInsn( CHECKCAST, Type.getInternalName( TraitableBean.class ) );
                    mv.visitLdcInsn( hardField.getTypeName() );
                    mv.visitMethodInsn( INVOKEINTERFACE, Type.getInternalName( TraitableBean.class ), "getTrait", Type.getMethodDescriptor( Type.getType( Thing.class ), new Type[] { Type.getType( String.class ) } ) );
                    mv.visitVarInsn( ASTORE, 1 );
                } else {
                    // handled by normal inheritance, exceptions should have been thrown
                    if ( ! hardField.getType().isAssignableFrom( field.getType() ) ) {
                        mv.visitInsn( RETURN );
                    }
                }
                Label l1 = new Label();
                mv.visitJumpInsn(GOTO, l1);

                mv.visitLabel( l0 );
                mv.visitInsn( ACONST_NULL );
                mv.visitVarInsn( ASTORE, 1 );
                mv.visitLabel( l1 );
            } else if ( field.getType().isPrimitive() ) {
                if ( ! hardField.getType().equals( field.getType() ) ) {
                    mv.visitInsn( RETURN );
                }
            }
        }

        TraitFactory.invokeInjector( mv, masterName, trait, core, field, false, 1 );

        mv.visitInsn( RETURN );
        mv.visitMaxs( 0, 0 );
        mv.visitEnd();

    }
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    protected void buildSoftSetter( ClassVisitor cw, FieldDefinition field, String proxy, ClassDefinition trait, ClassDefinition core, String setterName, boolean protect ) {
        String fieldName = field.getName();
        String type = field.getTypeName();

        MethodVisitor mv = cw.visitMethod( protect ? ACC_PROTECTED : ACC_PUBLIC,
                setterName,
                "(" + Type.getDescriptor( field.getType() ) + ")V",
                null,
                null );
        mv.visitCode();

        if ( core.isFullTraiting() ) {
            logicalSetter( mv, field, proxy, this.trait, core, true );
        }

        mv.visitVarInsn( ALOAD, 0 );
        mv.visitFieldInsn( GETFIELD, BuildUtils.getInternalType( proxy ), "store", Type.getDescriptor( TripleStore.class ) );
        mv.visitVarInsn( ALOAD, 0 );
        mv.visitLdcInsn( field.resolveAlias() );
        mv.visitVarInsn( BuildUtils.varType( type ), 1 );
        if ( BuildUtils.isPrimitive( type ) ) {
            TraitFactory.valueOf( mv, type );
        }
        mv.visitMethodInsn( INVOKEVIRTUAL, BuildUtils.getInternalType( proxy ), "property",
                            "(" + Type.getDescriptor( String.class ) + Type.getDescriptor( Object.class ) + ")" + Type.getDescriptor( Triple.class ) );
        mv.visitMethodInsn( INVOKEVIRTUAL, Type.getInternalName( TripleStore.class ), "put", "(" + Type.getDescriptor( Triple.class )+ ")Z" );

        mv.visitInsn( POP );
        mv.visitInsn( RETURN );
//        mv.visitMaxs( 3 + BuildUtils.sizeOf( type ), 1 + BuildUtils.sizeOf( type ) );
        mv.visitMaxs( 0, 0 );
        mv.visitEnd();

    }
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  }

  public Object getValue(Object ctx, Object elCtx, VariableResolverFactory variableFactory) {
    Object[] parms = null;

    Function function = (Function) ctx;

    if (parameters != null && parameters.length != 0) {
      parms = new Object[parameters.length];
      for (int i = 0; i < parms.length; i++) {
        parms[i] = parameters[i].getValue(ctx, elCtx, variableFactory);
      }
    }

    if (nextNode != null) {
      return nextNode.getValue(function.call(ctx, elCtx, variableFactory, parms), elCtx, variableFactory);
    }
    else {
      return function.call(ctx, elCtx, variableFactory, parms);
    }
  }
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    }

    /**
     * Produce the funciton node.
     */
    return new Function(name, expr, startCond, endCond - startCond, blockStart, blockEnd - blockStart, fields,
        pCtx == null ? pCtx = AbstractParser.getCurrentThreadParserContext() : pCtx);
  }
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        ctx = m.getDeclaringClass();
        name = m.getName();
      }
      else if (pCtx.hasFunction(name)) {
        resolvedExternally = false;
        Function f = pCtx.getFunction(name);
        f.checkArgumentCount(
            parseParameterList(
                (((cursor = balancedCapture(expr, cursor, end, '(')) - st) > 1 ?
                    ParseTools.subset(expr, st + 1, cursor - st - 1) : new char[0]), 0, -1).size());

        return f.getEgressType();
      }
      else if (pCtx.hasVarOrInput("this")) {
        if (pCtx.isStrictTypeEnforcement()) {
          recordTypeParmsForProperty("this");
        }
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        ctx = m.getDeclaringClass();
        name = m.getName();
      }
      else if (pCtx.hasFunction(name)) {
        resolvedExternally = false;
        Function f = pCtx.getFunction(name);
        f.checkArgumentCount(
            parseParameterList(
                (((cursor = balancedCapture(expr, cursor, end, '(')) - st) > 1 ?
                    ParseTools.subset(expr, st + 1, cursor - st - 1) : new char[0]), 0, -1).size());

        return f.getEgressType();
      }
      else if (pCtx.hasVarOrInput("this")) {
        if (pCtx.isStrictTypeEnforcement()) {
          recordTypeParmsForProperty("this");
        }
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    }

    /**
     * Produce the funciton node.
     */
    return new Function(name, expr, startCond, endCond - startCond, blockStart, blockEnd - blockStart, fields,
        pCtx == null ? pCtx = AbstractParser.getCurrentThreadParserContext() : pCtx);
  }
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