Examples of org.apache.tapestry5.ioc.util.BodyBuilder

org.apache.tapestry5.ioc.util.BodyBuilder
Utility class for assembling the body used with Javassist when defining a method or constructor. Basically, assists with formatting and with indentation. This makes the code that assembles a method body much simpler ... and it makes the result neater, which will be easier to debug (debugging dynamically generated code is hard enough that it should be easy to read the input code before worrying about why it doesn't compile or execute properly).
This class is not threadsafe.
Most of the methods return the BodyBuilder, to form a fluent interface. @deprecated In 5.3/0, to be removed in a later release

    {
        String defaultFieldName = transformation.addField(Modifier.PRIVATE, fieldType, fieldName + "_default");


        String invariantFieldName = transformation.addField(Modifier.PRIVATE, "boolean", fieldName + "_invariant");


        BodyBuilder builder = new BodyBuilder();
        builder.begin();


        addDefaultBindingSetup(parameterName, defaultPrefix, defaultBinding, resourcesFieldName, transformation,
                               builder);


        builder.addln("%s = %s.isInvariant(\"%s\");", invariantFieldName, resourcesFieldName, parameterName);


        // Store the current value of the field into the default field. This value will
        // be used to reset the field after rendering.


        builder.addln("%s = %s;", defaultFieldName, fieldName);
        builder.end();


        transformation.extendMethod(TransformConstants.CONTAINING_PAGE_DID_LOAD_SIGNATURE, builder
                .toString());


        // Now, when the component completes rendering, ensure that any variant parameters are
        // are returned to default value. This isn't necessary when the parameter is not cached,
        // because (unless the binding is invariant), there's no value to get rid of (and if it is
        // invariant, there's no need to get rid of it).


        if (cache)
        {
            builder.clear();


            builder.addln("if (! %s)", invariantFieldName);
            builder.begin();
            builder.addln("%s = %s;", fieldName, defaultFieldName);
            builder.addln("%s = false;", cachedFieldName);
            builder.end();


            transformation.extendMethod(TransformConstants.POST_RENDER_CLEANUP_SIGNATURE, builder
                    .toString());
        }


        return invariantFieldName;
    }

View Full Code Here

                                                                 advisedMethod.getMethodName() + "Info",
                                                                 info);


        String componentResourcesField = transformation.getResourcesFieldName();


        BodyBuilder builder = new BodyBuilder().begin();


        builder.addln("%s invocation = new %<s(%s, %s, $$);", invocationClassName, methodInfoField,
                      componentResourcesField);


        // Off into the first MethodAdvice


        builder.addln("invocation.proceed();");


        String[] exceptionTypes = advisedMethod.getExceptionTypes();
        int exceptionCount = exceptionTypes.length;


        if (exceptionCount > 0)
        {
            for (int i = 0; i < exceptionCount; i++)
            {
                String type = exceptionTypes[i];
                String name = "ex" + i;


                builder.addln("%s %s = (%1$s) invocation.getThrown(%s.getExceptionType(%d));",
                              type, name, methodInfoField, i);
                builder.addln("if (%s != null) throw %<s;", name);
            }
        }


        String returnType = advisedMethod.getReturnType();


        if (!returnType.equals("void"))
        {
            builder.addln("return %s;",
                          ClassFabUtils.castReference("invocation.getResult()", returnType));
        }




        builder.end();


        /** Replace the original method with the new implementation. */
        transformation.addMethod(advisedMethod, builder.toString());
    }

View Full Code Here

        transformation.addMethod(advisedMethod, builder.toString());
    }


    private void implementInvokeAdvisedMethod(String advisedMethodName) throws CannotCompileException
    {
        BodyBuilder builder = new BodyBuilder().begin();


        boolean isVoid = advisedMethod.getReturnType().equals("void");


        builder.addln("%s component = (%<s) getComponentResources().getComponent();", transformation.getClassName());


        String[] exceptionTypes = advisedMethod.getExceptionTypes();
        int exceptionCount = exceptionTypes.length;


        if (exceptionCount > 0)
            builder.add("try").begin();


        if (!isVoid) builder.add("overrideResult(($w) ");


        builder.add("component.%s(", advisedMethodName);


        for (int i = 0; i < advisedMethod.getParameterTypes().length; i++)
        {
            if (i > 0) builder.add(", ");


            builder.add("%s%d", FIELD_NAME, i);
        }


        builder.add(")");


        if (!isVoid) builder.add(")");


        builder.addln(";");


        if (exceptionCount > 0)
        {
            builder.end(); // try


            for (int i = 0; i < exceptionCount; i++)
            {
                builder.addln("catch (%s ex) { overrideThrown(ex); }", exceptionTypes[i]);
            }
        }


        builder.end();


        CtMethod method = new CtMethod(CtClass.voidType, "invokeAdvisedMethod",
                                       new CtClass[0], invocationCtClass);


        method.setModifiers(PROTECTED_FINAL);
        method.setBody(builder.toString());


        invocationCtClass.addMethod(method);
    }

View Full Code Here

        CtClass[] parameterTypes = new CtClass[parameterCount + 2];


        parameterTypes[0] = toCtClass(MethodInvocationInfo.class);
        parameterTypes[1] = toCtClass(ComponentResources.class);


        BodyBuilder builder = new BodyBuilder().begin().addln("super($1,$2);");


        for (int i = 0; i < parameterCount; i++)
        {
            String name = FIELD_NAME + i;


            String parameterTypeName = advisedMethod.getParameterTypes()[i];


            CtClass parameterType = classSource.toCtClass(parameterTypeName);


            CtField field = new CtField(parameterType, name, invocationCtClass);
            field.setModifiers(Modifier.PRIVATE);
            invocationCtClass.addField(field);


            parameterTypes[2 + i] = parameterType;


            builder.addln("%s = $%d;", name, 3 + i);
        }


        builder.end();


        CtConstructor constructor = new CtConstructor(parameterTypes, invocationCtClass);
        constructor.setBody(builder.toString());


        invocationCtClass.addConstructor(constructor);


    }

View Full Code Here

        return classSource.toCtClass(input);
    }


    private void implementOverride() throws CannotCompileException
    {
        BodyBuilder builder = new BodyBuilder().begin();


        builder.addln("switch ($1)").begin();


        int count = advisedMethod.getParameterTypes().length;


        for (int i = 0; i < count; i++)
        {
            String type = advisedMethod.getParameterTypes()[i];


            builder.addln("case %d: %s = %s; break;", i, FIELD_NAME + i, ClassFabUtils.castReference("$2", type));
        }


        builder.addln("default: throw new IllegalArgumentException(\"Index out of range.\");");


        builder.end().end();


        CtMethod method = new CtMethod(CtClass.voidType, "override",
                                       new CtClass[] { CtClass.intType, toCtClass(Object.class) }, invocationCtClass);


        method.setModifiers(PUBLIC_FINAL);
        method.setBody(builder.toString());


        invocationCtClass.addMethod(method);
    }

View Full Code Here

        invocationCtClass.addMethod(method);
    }


    private void implementGetParameter() throws CannotCompileException
    {
        BodyBuilder builder = new BodyBuilder().begin();


        builder.addln("switch ($1)").begin();


        int count = advisedMethod.getParameterTypes().length;


        for (int i = 0; i < count; i++)
        {
            builder.addln("case %d: return ($w) %s;", i, FIELD_NAME + i);
        }


        builder.addln("default: throw new IllegalArgumentException(\"Index out of range.\");");


        builder.end().end();


        CtMethod method = new CtMethod(toCtClass(Object.class), "getParameter",
                                       new CtClass[] { CtClass.intType }, invocationCtClass);


        method.setModifiers(PUBLIC_FINAL);
        method.setBody(builder.toString());


        invocationCtClass.addMethod(method);
    }

View Full Code Here

        }


        cf.addInterface(commandInterface);
        cf.addField("_commands", Modifier.PRIVATE | Modifier.FINAL, array);


        BodyBuilder builder = new BodyBuilder();
        builder.addln("_commands = (%s[]) $1.toArray(new %<s[0]);", commandInterface.getName());


        cf.addConstructor(new Class[] { List.class }, null, builder.toString());
    }

View Full Code Here

            return;
        }


        String defaultValue = defaultForReturnType(returnType);


        BodyBuilder builder = new BodyBuilder();
        builder.begin();


        builder.addln("%s result = %s;", ClassFabUtils.toJavaClassName(returnType), defaultValue);
        builder.addln("for (int i = 0; i < _commands.length; i++)");


        builder.begin();
        builder.addln("result = _commands[i].%s($$);", sig.getName());


        builder.addln("if (result != %s) break;", defaultValue);


        builder.end();


        builder.addln("return result;");
        builder.end();


        cf.addMethod(Modifier.PUBLIC, sig, builder.toString());
    }

View Full Code Here

        return "0";
    }


    private void addVoidMethod(ClassFab cf, Class commandInterface, MethodSignature sig)
    {
        BodyBuilder builder = new BodyBuilder();


        builder.begin();


        builder.addln("for (int i = 0; i < _commands.length; i++)");
        builder.addln("  _commands[i].%s($$);", sig.getName());


        builder.end();


        cf.addMethod(Modifier.PUBLIC, sig, builder.toString());
    }

View Full Code Here


        ct.addMethod(reader, "return 66;");


        ct.replaceReadAccess("_targetField", "read_target_value");


        BodyBuilder builder = new BodyBuilder();
        builder.begin();
        builder.addln("%s.run();", name);
        builder.addln("return $_ + 1;");
        builder.end();


        ct.extendExistingMethod(sig, builder.toString());


        ct.finish();


        Object target = instantiate(MethodPrefixTarget.class, ct, null);

View Full Code Here

0 1 2 3 4 5 6 7 8 9

TOP

Related Classes of org.apache.tapestry5.ioc.util.BodyBuilder

org.apache.tapestry5.Asset

org.apache.tapestry5.BooleanHook

org.apache.tapestry5.ContentType

org.apache.tapestry5.corelib.components.Form

org.apache.tapestry5.corelib.components.Palette

org.apache.tapestry5.corelib.components.Select

org.apache.tapestry5.corelib.components.Tree

org.apache.tapestry5.corelib.internal.FormSupportImpl

org.apache.tapestry5.corelib.pages.ComponentLibraries

org.apache.tapestry5.corelib.pages.PropertyEditBlocks

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.