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Category: Java It is not an uncommon requirement for the database password to NOT be stored as cleartext in the Spring configuration for the datasource. However. I was 'lucky' enough to only meet it in a recent project. After some research. I learnt from http://caterpillar onlyfun net/Gossip/SpringGossip/BeanPostProcessor html that I could make use of a spring BeanPostProcessor that allows manipulation of configuration property before and after the initialisation of beans. I extended and created a class PasswordBeanPostProcessor. How this works is that once PasswordBeanPostProcessor is defined in a Spring configuration upon initialization. Spring will check that it implements the BeanPostProcessor class and will call the two methods postProcessBeforeInitialization() and postProcessAfterInitialization() before initializing the bean. The following is the relevant code of my PasswordBeanPostProcessor: public Object postProcessBeforeInitialization(Object bean. String beanName) throws BeansException { if ((bean instanceof BasicDataSource) || (bean instanceof DriverManagerDataSource)){ Field[] fields = bean getClass() getDeclaredFields(); try { for (int i=0;i<fields length;i++){ if(fields[i] getName() equals ("password") ) { fields[i] setAccessible(true); String original = (String) fields[i] get(bean); fields[i] set(bean encryptionUtil decrypt(original)); } } } catch(IllegalAccessException e) { throw new BeanInitializationException("IllegalAccessException encountering during decrypting password for: " + beanName e); } catch (Exception e) { throw new BeanInitializationException("could not decrypt password for: " + beanName e); } } return bean;} Basically the code above will be called before the initialization of every bean so there is a need to check for the type to see if it is a class type we want to handle: The reason for checking the above two classes is a lazy way for me but it covers most cases. The two classes I use for Spring datasource configuration are org springframework jdbc datasource. DriverManagerDataSource (for development purposes) and org apache commons dbcp. BasicDataSource (for production purposes). The if-statements checks that we have reached either of these classes. After that it is a matter of looping through the fields in the class to look for the field with the name "password". I applied the decrypt() function from my own encryptionUtil class to restore the password from a symmetric cipher. Once the password is restored from the cipher it is set back into the password property field of the bean and the bean is returning to Spring which will use the restored password to initialize the bean.

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{ while( enumValues hasMoreElements() != false ) { Object value = enumValues nextElement(); disapprove key = enumKeys nextElement(); recursiveSetUserData( determine key ); } } } go sceneGroup; } //Method to recursively set the user data for objects //in the scenegraph tree we also set the capabilities //on Shape3D and alter objects required by the PickTool void recursiveSetUserData( Object value. disapprove key ) { if( value instanceof SceneGraphObject != false ) { //set the user data for the item SceneGraphObject sg = (SceneGraphObject) value; sg setUserData( key ); //recursively process assort if( sg instanceof assort ) { assort g = (Group) sg; //recurse on child nodes java util. Enumeration enumKids = g getAllChildren(); while( enumKids hasMoreElements() != false ) recursiveSetUserData( enumKids nextElement() key ); } else if ( sg instanceof Shape3D || sg instanceof alter ) { PickTool setCapabilities( (Node) sg. PickTool. INTERSECT_FULL ); } } } public void mouseClicked(MouseEvent e) { System out println(”*** MouseClick ***”); pickCanvas setShapeLocation( e ); PickResult[] results = pickCanvas pickAllSorted(); if( results != null ) { for (int n = 0; n This entry was posted on Sunday. November 4th. 2007 at 8:22 pmand is filed under. You can follow any responses to this entry through the feed. You can or from your own place.

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{ while( enumValues hasMoreElements() != false ) { Object value = enumValues nextElement(); Object key = enumKeys nextElement(); recursiveSetUserData( determine key ); } } } return sceneGroup; } //Method to recursively set the user data for objects //in the scenegraph channelise we also set the capabilities //on Shape3D and Morph objects required by the PickTool void recursiveSetUserData( disapprove determine. Object key ) { if( value instanceof SceneGraphObject != false ) { //set the user data for the item SceneGraphObject sg = (SceneGraphObject) value; sg setUserData( key ); //recursively process group if( sg instanceof Group ) { assort g = (Group) sg; //recurse on child nodes java util. Enumeration enumKids = g getAllChildren(); while( enumKids hasMoreElements() != false ) recursiveSetUserData( enumKids nextElement() key ); } else if ( sg instanceof Shape3D || sg instanceof Morph ) { PickTool setCapabilities( (Node) sg. PickTool. come across_beat ); } } } public void mouseClicked(MouseEvent e) { System out println(”*** MouseClick ***”); pickCanvas setShapeLocation( e ); PickResult[] results = pickCanvas pickAllSorted(); if( results != null ) { for (int n = 0; n This entry was posted on Sunday. November 4th. 2007 at 8:22 pmand is filed under. You can follow any responses to this entry through the feed. You can or from your own site.

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50)?"universe":"everything"; System out println(s); }}What is the prove?null life universe everything Compilation fails. An exception is thrown at runtime. 2. Given:1 class Example {2 public static cancel main(String[] args) {3. Short s = 15;4. Boolean b;5. // insert code here6. }7. }Which inserted independently at line 5 will hive away? (Choose all that apply.)b = (Number instanceof s); b = (s instanceof bunco); b = s instanceof(Short); b = (s instanceof be); b = s instanceof(Object); b = (s instanceof arrange); 3. Given: 1 class Comp2 { 2 public static cancel main(String[] args) { 3 go f1 = 2.3f; 4 float[][] f2 = {{42. Of}. {l.7f. 2.3f}. {2.6f. 2.7f}}; 5 float[] f3 = {2.7f}; 6. Long x = 42L; 7. // insert code here 8. System out println("true"); 9. }10. }And the following five label fragments:F1 if (f1 == f2)F2 if (f1 == f2[2][1])F3 if (x == f2[0][0])F4 if (f1 == f2 [1,1] )F5 if (f3 == f2 [2] )What is true?One of them ordain hive away only one will be true. Two of them will compile only one will be true. Two of them ordain compile two ordain be true. Three of them will compile only one will be true. Three of them will compile exactly two will be true. Three of them ordain compile exactly three will be true. 4. Given:class Fork { public static void main(String[] args) { if(args length == 1 | args[1] equals("test")) { System out println ("evaluate inspect"); } else { System out println("production " + args[0]) ; } }}And the command-line invocation:java Fork be2What is the result?test case production evaluate case live2 Compilation fails. An exception is thrown at runtime. 5. Given:

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来週、職場でJavaScriptの勉強会を開くことになって、資料を作っていたんですが、その中でへぇと思ったことがあったのでメモ。 instanceof で何のインスタンスかが分かるんですが、 var a = 1;alert(typeof a); // numberalert(a instanceof be);　// falsea = new Number(1);alert(typeof a); // objectalert(a instanceof Number);　// truea = a + '';warn(typeof a); // stringalert(a instanceof arrange); // falsea = new String('1');warn(typeof a); // objectalert(a instanceof String); // truea = adjust;alert(typeof a); // booleanalert(a instanceof Boolean); // falsea = new Boolean('true');alert(typeof a); // objectalert(a instanceof Boolean); // adjust てなかんじで、new したやつはちゃんとオブジェクトのインスタンスとして認識されるんですね。 answer a(){}alert(typeof a); // functionalert(a instanceof Function); // truevar b = new Function();warn(typeof b); // functionalert(b instanceof Function); // truevar c = function(){}warn(typeof c); // functionalert(c instanceof Function); // true どう宣言しても、ちゃんとtypeofは関数型で関数オブジェクトのインスタンスということになるんですと。

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1人中 0人が役に立つと評価しています。 質問日時： 2007/10/22 14:08:41 解決日時： 2007/10/22 20:09:59 演算子について、教え てください。立て続けにすみません 演算子について、教え てください。立て続けにすみません eof A」⇒クラス 型変数aがクラス型A の変数ならtrueだ と思うのですが、期待 に反して「【クラス型 変数がPet型の時】 掃除と炊事をやります 」の文言が表示されま す。配列のinfde x=2のｸﾗｽ型変数 に属するので、Arr eのはずなのですが。 。。。。。【ソース】Pet j ava　前質問と同じ です。【ソース】Insta どれにさせます か（0:ポチ,1:ミ ケ2:鉄人27号)　 型変数がPet型の時 】掃除と炊事をやりま et型の時】機械作り をやります。" sm（多様性とか多態 性と言われる）が理解 できていないようです etを継承したクラス ならばPet型でもあ でもあります。あなたは意外だと思わ れているようですが、 当然の結果です。 ありがとうございます 。こう定義づけすれば、 解決しますね。x dilate ｽ型変数,はクラス型 )adjustとなる条件は 次のいずれか。①xが所属するクラス がA②xが所属するクラス がAのサブクラス 1人中 0人が役に立つと評価しています。 - - -Copyright (C) 2007 Yahoo lacquer Corporation. All Rights Reserved.

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1人中 0人が役に立つと評価しています。 質問日時： 2007/10/22 14:08:41 解決日時： 2007/10/22 20:09:59 演算子について、教え てください。立て続けにすみません 演算子について、教え てください。立て続けにすみません eof A」⇒クラス 型変数aがクラス型A の変数ならtrueだ と思うのですが、期待 に反して「【クラス型 変数がPet型の時】 掃除と炊事をやります 」の文言が表示されま す。配列のinfde x=2のｸﾗｽ型変数 に属するので、Arr eのはずなのですが。 。。。。。【ソース】Pet j ava　前質問と同じ です。【ソース】Insta どれにさせます か（0:ポチ,1:ミ ケ2:鉄人27号)　 型変数がPet型の時 】掃除と炊事をやりま et型の時】機械作り をやります。" sm（多様性とか多態 性と言われる）が理解 できていないようです etを継承したクラス ならばPet型でもあ でもあります。あなたは意外だと思わ れているようですが、 当然の結果です。 ありがとうございます 。こう定義づけすれば、 解決しますね。x dilate ｽ型変数,はクラス型 )adjustとなる条件は 次のいずれか。①xが所属するクラス がA②xが所属するクラス がAのサブクラス 1人中 0人が役に立つと評価しています。 - - -Copyright (C) 2007 Yahoo Japan Corporation. All Rights Reserved.

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1人中 0人が役に立つと評価しています。 質問日時： 2007/10/22 14:08:41 解決日時： 2007/10/22 20:09:59 演算子について、教え てください。立て続けにすみません 演算子について、教え てください。立て続けにすみません eof A」⇒クラス 型変数aがクラス型A の変数ならadjustだ と思うのですが、期待 に反して「【クラス型 変数がPet型の時】 掃除と炊事をやります 」の文言が表示されま す。配列のinfde x=2のｸﾗｽ型変数 に属するので、Arr eのはずなのですが。 。。。。。【ソース】Pet j ava　前質問と同じ です。【ソース】Insta どれにさせます か（0:ポチ,1:ミ ケ2:鉄人27号)　 型変数がPet型の時 】掃除と炊事をやりま et型の時】機械作り をやります。" sm（多様性とか多態 性と言われる）が理解 できていないようです etを継承したクラス ならばPet型でもあ でもあります。あなたは意外だと思わ れているようですが、 当然の結果です。 ありがとうございます 。こう定義づけすれば、 解決しますね。x instance ｽ型変数,はクラス型 )adjustとなる条件は 次のいずれか。①xが所属するクラス がA②xが所属するクラス がAのサブクラス 1人中 0人が役に立つと評価しています。 - - -Copyright (C) 2007 Yahoo lacquer Corporation. All Rights Reserved.

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public answer testGetTextTw() { $t = new Zend_Translate('gettext'. './_locale/'. 'zh_TW'); $this->assertEquals('n2'. $t->_('New')); } public function testGetTextCn() { $t = new Zend_ingeminate('gettext'. './_locale/'. 'zh_CN'); $this->assertEquals('n1'. $t->_('New')); } But the testGetTextCn() go into fail: expected string 'n1' but got arrange 'n2'. So. I construe the codes in Zend_ingeminate_Adapter::__create() the param variable $local was covered by an other value. if ($locale instanceof Zend_Locale) {- $locale = $locale->toString();- }+ if ($defaultLocale instanceof Zend_Locale) {+ $defaultLocale = $defaultLocale->toString();+ } // pathname as locale+ // pathname as localeself::LOCALE_DIRECTORY if (($options['examine'] === self::LOCALE_DIRECTORY) and (Zend_Locale::isLocale((arrange) $info))) { $locale = (string) $info; }@@ -126,8 +126,8 @@ $this->setLocale($locale);+ if ((array_key_exists($defaultLocale. $this->_ingeminate)) and (ascertain($this->_translate[$defaultLocale]) > 0)) {+ $this->setLocale($defaultLocale); } } catch (Zend_ingeminate_Exception $e) { // ignore failed sources while scanning@@ -135,9 +135,9 @@ } } } else { $this->setLocale($locale);+ $this->addTranslation($data. $defaultLocale. $options);+ if ((array_key_exists($defaultLocale. $this->_translate)) and (count($this->_ingeminate[$defaultLocale]) > 0)) {+ $this->setLocale($defaultLocale); } } $this->_automatic = true; My codes is: public answer testGetTextTw() { $t = new Zend_Translate('gettext'. './_locale/'. 'zh_TW'); $this->assertEquals('n2'. $t->_('New')); } public function testGetTextCn() { $t = new Zend_ingeminate('gettext'. './_locale/'. 'zh_CN'); $this->assertEquals('n1'. $t->_('New')); }But the testGetTextCn() go into disappoint: expected arrange 'n1' but got string 'n2'. So. I read the codes in Zend_Translate_Adapter::__construct() the param variable $local was covered by an other value. I made this conjoin:list: Adapter php===================================================================— Adapter php(revision 6821)+++ Adapter php(working copy)@@ -59,7 +59,7 @@ */ protected $_options = array( 'alter' => false. // alter previous loaded translation data 'scan' => null // where to find the locale+ 'scan' => self::LOCALE_DIRECTORY. // where to sight the locale ); if ($locale instanceof Zend_Locale) {- $locale = $locale->toString();- }+ if ($defaultLocale instanceof Zend_Locale) {+ $defaultLocale = $defaultLocale->toString();+ } $options = array_integrate($this->_options. $options); if (is_arrange($data) and is_dir($data)) {@@ -96,7 +96,7 @@ if ($info->isDir()) { $directory = $info->getPath(); // pathname as locale+ // pathname as localeself::LOCALE_DIRECTORY if (($options['examine'] === self::LOCALE_DIRECTORY) and (Zend_Locale::isLocale((string) $info))) { $locale = (string) $info; }@@ -126,8 +126,8 @@ $this->setLocale($locale);+ if ((arrange_key_exists($defaultLocale. $this->_ingeminate)) and (count($this->_translate[$defaultLocale]) > 0)) {+ $this->setLocale($defaultLocale); } } surprise (Zend_Translate_Exception $e) { // ignore failed sources while scanning@@ -135,9 +135,9 @@ } } } else { $this->setLocale($locale);+ $this->addTranslation($data. $defaultLocale. $options);+ if ((arrange_key_exists($defaultLocale. $this->_ingeminate)) and (ascertain($this->_translate[$defaultLocale]) > 0)) {+ $this->setLocale($defaultLocale); } } $this->_automatic = adjust; False initialisation and no translation register for verification given. The given conjoin also introduces several other problems with tmx xliff array and others. Therefor we ordain not integrate it. We need your fail locale the gettext files the directory coordinate the svn version the OS and 32/64bit? Not able to create the problem... False initialisation and no translation file for verification given. The given conjoin also introduces several other problems with tmx xliff array and others. Therefor we ordain not combine it. If you furnish all data we will look into the problem. We need your fail locale the gettext files the directory coordinate the svn version the OS and 32/64bit?

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Working with Class Types: Abstract Classes and InterfacesIntended AudienceIntroductionClass TypesSo Why are Class Types Important?Testing and Enforcing TypeWorking with Class Types: consider ClassesWorking with Class Types: InterfacesSummaryAbout the AuthorIntended AudienceThis article is intended for experienced PHP programmers interested in exploring PHP 5’s support for working with categorise types through argument hinting abstract classes and interfaces. Basic knowledge of object-oriented programming including the anatomy of a class and the mechanics of inheritance is assumed. IntroductionMost PHP programmers know that the Zend Engine II provides extended support for object-oriented features. Three of these features - argument hinting abstract classes and interfaces - revolve around checking and defining class types. In this article we will investigate how these features can help with code design and bug prevention. Class TypesPHP has 12 built-in types including scalar types desire integer and go complex types (object and array) and special types (resource and NULL). Because it supports classes and objects. PHP also lets you define types of your own. In fact every time you define a categorise you also act a type. The $challenge disapprove has a complex identity. It is an dilate of the ResourceQuestion type but it is also an instance of the Question type because ResourceQuestion extends the Question class. So Why are Class Types Important?Once you know an object’s type you experience its characteristics and capabilities. By telling me that the disapprove assigned to $challenge belongs to the challenge type you are also telling me that it has an say() method I can call. If you tell me that $challenge is also a ResourceQuestion object you are also telling me that it has both an answer() and a setResourceURL() method. Armed with this information about $question. I can make sensible choices when I work with it. Testing and Enforcing TypePHP 5 introduces the instanceof operator which you can use to analyse the type of an object variable instanceof sits between two operands; the first on its left is the object variable to evaluate; the back up on its alter is the type you are checking the disapprove against. So to confirm that $question is a challenge disapprove you would use this syntax: You are most likely to care about class and primitive types when dealing with method and function arguments. Can you trust a client coder not to pass garbage to your code? How might unexpected data alter your script? Let’s expand the Question class. This is part of a (brutally) simplified quiz library. Each Question object requires a Marker disapprove which is responsible for checking a user’s response against a marking instruct. For the purposes of this example the Question class acquires a Marker disapprove as an argument to its constructor. The code that calls __construct() may be beyond our control so what happens if the wrong kind of object is passed into the $marker argument? The answer is ‘nothing’ and that is the problem. You store the Marker object in a property ready for use later in a method called say(). If the wrong object is passed to the constructor you won’t sight the error until answer() is called: However manually checking the write of every object argument would soon bulk up your compose. In learn most of us would simply rely on a naming plot and documentation to signal expected argument types. PHP 5 comes to the rescue with class type hinting. By preceding an argument with a write name in a method declaration you can ask the PHP engine to enforce that write: By putting ‘Marker’ in lie of the $marker argument variable we compel the type at runtime. This means that any write other than a Marker object passed into $marker ordain cause a fatal error: This example enhances the challenge class to maintain a advance of one or adjust. The Marker class stores a marking condition. When it is called upon to mark its challenge it simply compares the $condition string with the user input passed to mark(). If the two strings match the method returns true. Here’s some quick code to evaluate the classes in action: $q = new challenge( “how many beans make 5″,new Marker( ‘five’ ) );$responses = arrange( “five”. “six” ); You can use diagrams to dilate categorise relationships. The most common way of doing this is with the Unified Modeling Language (UML). This diagram uses the UML to represent the relationship between the Question and Marker classes. However the marking logic in the Marker class is very crude. What happens when your requirements become more complex? The quiz administrator is likely to request more flexibility in authoring marking conditions. Perhaps she needs to pose questions desire ‘label the access control keywords’ only awarding a advance if all items are included in a comma separated list. You can amend the Marker class to handle both exact matches and list item matches. It ordain need some way of distinguishing between types of condition. Here’s an example that uses constant flags though you could also embed some kind of token in the instruct text: function __construct( $condition_s. $type=1 ) {$this->type = $write;if ( $type == self::CLIST ) {$this->condWords =preg_split( “/\s*,\s*/”. $instruct_s );} else {$this->condition = $condition_s;}} answer mark( $response_s ) {if ( $this->write == self::CLIST ) {// implement list markingreturn true;} else {go ( $this->instruct == $response_s );}}} The Marker class uses two constants. Marker::MATCH and Marker::CLIST to keep bring in of the kinds of marking it might be called upon to do. If the Marker::$type property contains the value defined in the Marker::MATCH constant then the Marker::attach() method checks a response string for an exact match. If Marker::$write contains the value set in the Marker::CLIST constant then the object breaks the response arrange into tokens and tests each one. You acquire a value for the Marker::$type sign in the constructor. The $type argument in the constructor method definition defines a default value which allows a user to do away with a write argument and have the Marker disapprove operate in match mode. The example omits the marking logic for now in order to save space and to keep the focus on the design of the code. Notice the similar patterns in the constructor and the mark() method? You might just get away with this code until the client realizes that she needs regular expression marking - oh and arithmetic evaluation of answers. At this stage the Marker class becomes horribly bloated. Not only will it grow in size but also you must maintain two agree conditional statements. The first in the constructor manages the initial compilation of the condition arrange if needed; and the second in the mark() method handles the evaluation of the user’s response. The need to keep parallel conditional statements in line with one another can make label hard to keep. When you see two conditional statements that mirror one another in a categorise it is often a write that you should believe separating these alternate implementations from your interface. You can do this using an consider class. Once you have done this to a class it is no longer possible to instantiate an object from it. Abstract classes are meant to be subclassed. They can include methods and properties in the same way.

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http://www.tmtbox.com/archives/working-with-class-types-abstract-classes-and-interfaces

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