tapestry验证textarea

 tapestry验证textarea

ValidTextArea.java：

java代码:

package com. tomxp. web. components. valid; import org. apache. tapestry. ApplicationRuntimeException; import org. apache. tapestry. IForm; import org. apache. tapestry. IMarkupWriter; import org. apache. tapestry. IRequestCycle; import org. apache. tapestry. Tapestry; import org. apache. tapestry. form. TextArea; import org. apache. tapestry. valid. IValidationDelegate; import org. apache. tapestry. valid. IValidator; import org. apache. tapestry. valid. ValidatorException; /** * @author Peter Butler */ public abstract class ValidTextArea extends TextArea {         WriterErrorDecorator myWriter = new WriterErrorDecorator (this );                 public ValidTextArea ( ) {                 super ( );         }                 public abstract IValidator getValidator ( );         public abstract String getDisplayName ( );                 protected void renderComponent (IMarkupWriter writer, IRequestCycle cycle ) {                 IForm form = getForm (cycle );                 IValidationDelegate delegate = form. getDelegate ( );                 if (delegate == null )                         throw new ApplicationRuntimeException (Tapestry. format ("ValidTextArea. no-delegate", getExtendedId ( ), getForm ( ). getExtendedId ( ) ), this, null, null );                 IValidator validator = getValidator ( );                 if (validator == null )                         throw Tapestry. createRequiredParameterException (this, "validator" );                 boolean rendering = !cycle. isRewinding ( );                                 IMarkupWriter superWriter;                 if (rendering ) {                         delegate. writePrefix (writer, cycle, this, validator );                         myWriter. init (writer, delegate, validator, cycle );                         superWriter = myWriter;                 } else {                         superWriter = writer;                 }                                 super. renderComponent (superWriter, cycle );                 String name = getName ( );                 if (!rendering && !isDisabled ( ) ) {                         String value = cycle. getRequestContext ( ). getParameter (name );                         updateValue (value );                 }                 if (rendering ) {                         delegate. writeSuffix (writer, cycle, this, validator );                         myWriter. clear ( );                 }         }                 protected void updateValue ( String value ) {                 Object objectValue = null;                 IValidationDelegate delegate = getForm ( ). getDelegate ( );                 delegate. recordFieldInputValue (value );                 try {                         objectValue = getValidator ( ). toObject (this, value );                 } catch (ValidatorException ex ) {                         delegate. record (ex );                         return;                 }                 setValue ( ( String )objectValue );         }        }

ValidTextArea.jwc

java代码:

<?xml version=" 1. 0" encoding="UTF- 8"?> <!DOCTYPE component-specification       PUBLIC "- //Apache Software Foundation//Tapestry Specification 3.0//EN"       "http: //jakarta.apache.org/tapestry/dtd/Tapestry_3_0.dtd"> <!-- generated by Spindle, http: //spindle.sourceforge.net --> <component-specification class="com. tomxp. web. components. valid. ValidTextArea" allow-body="no">   <description>   A multi-line valid text area.   </description>     <parameter name="value" type="java. lang. String" required="yes" direction="form"/>     <parameter name="disabled" type=" boolean" direction="in"/>   <parameter name="validator" type="org. apache. tapestry. valid. IValidator" required="yes" direction="in">     <description>     Converts value to a string and parses strings back into object values.     </description>   </parameter>       <parameter name="displayName" type="java. lang. String" required="yes" direction="auto">     <description>     Name used by FieldLabel and when generating validation error messages.     </description>   </parameter>       <reserved-parameter name="name"/>     <property-specification name="name" type="java. lang. String"/>   <property-specification name="form" type="org. apache. tapestry. IForm"/> </component-specification>

java代码:

package com. tomxp. web. components. valid; import org. apache. tapestry. IMarkupWriter; import org. apache. tapestry. IRequestCycle; import org. apache. tapestry. form. IFormComponent; import org. apache. tapestry. valid. IValidationDelegate; import org. apache. tapestry. valid. IValidator; /** * @author Peter Butler */ public class WriterErrorDecorator implements IMarkupWriter {         private IMarkupWriter actual;         private IValidationDelegate delegate;         private IValidator validator;         private IRequestCycle cycle;         private IFormComponent field;         public WriterErrorDecorator (IFormComponent field ) {                 this. field = field;         }                 public void init (IMarkupWriter actual, IValidationDelegate delegate, IValidator validator, IRequestCycle cycle ) {                 this. actual = actual;                 this. delegate = delegate;                 this. validator = validator;                 this. cycle = cycle;         }                 public void clear ( ) {                 this. actual = null;                 this. delegate = null;                 this. validator = null;                 this. cycle = null;         }         public void attribute ( String name, int value ) {                 actual. attribute (name, value );         }         public void attribute ( String name, boolean value ) {                 actual. attribute (name, value );         }         public void attribute ( String name, String value ) {                 actual. attribute (name, value );         }         public void attributeRaw ( String name, String value ) {                 actual. attributeRaw (name, value );         }         public void begin ( String name ) {                 actual. begin (name );                 validator. renderValidatorContribution (field, this, cycle );                 delegate. writeAttributes (this, cycle, field, validator );         }         public void beginEmpty ( String name ) {                 actual. beginEmpty (name );                 validator. renderValidatorContribution (field, this, cycle );                 delegate. writeAttributes (this, cycle, field, validator );         }         public boolean checkError ( ) {                 return actual. checkError ( );         }         public void close ( ) {                 actual. close ( );         }         public void closeTag ( ) {                 actual. closeTag ( );         }         public void comment ( String value ) {                 actual. comment (value );         }         public void end ( ) {                 actual. end ( );         }         public void end ( String name ) {                 actual. end (name );         }         public void flush ( ) {                 actual. flush ( );         }         public IMarkupWriter getNestedWriter ( ) {                 return actual. getNestedWriter ( );         }         public void print (char [ ] data, int offset, int length ) {                 actual. print (data, offset, length );         }         public void print (char value ) {                 actual. print (value );         }         public void print ( int value ) {                 actual. print (value );         }         public void print ( String value ) {                 actual. print (value );         }         public void println ( ) {                 actual. println ( );         }         public void printRaw (char [ ] buffer, int offset, int length ) {                 actual. printRaw (buffer, offset, length );         }         public void printRaw ( String value ) {                 actual. printRaw (value );         }         public String getContentType ( ) {                 return actual. getContentType ( );         } }

对于TextArea的长度验证，的确只有自己写组件。特别是当页面中已经使用Tapestry的FieldLabel+Validator效验的时候，如果仅仅是简单的将JS写在HTML里面，就会出现无法于Tapestry动态生成的JavaScript整合的问题。。。

我看了一下Ewaves贴的代码，似乎没有贴出.script文件。我自己写的组件虽然和上面的代码完全不一样，但是.script文件却是可以通用的，它能够自动生成动态的javascript。

java代码:

<?xml version=" 1. 0" encoding="GBK"?> <!-- $Id: DatePicker. script,v 1. 5 2004/ 03/ 09 18: 23: 50 hlship Exp $ --> <!DOCTYPE script PUBLIC         "- //Apache Software Foundation//Tapestry Script Specification 3.0//EN"         "http: //jakarta.apache.org/tapestry/dtd/Script_3_0.dtd">   <script> <!-- input symbols:   textAreaScript: The TextAreaScript component.   output symbols:   formValidateFunction The name of a form validator function that validates the fields. --> <include-script resource-path="/org/apache/tapestry/valid/Validator. js"/> <input-symbol key="textAreaScript" class="com. cdmcs. tapestry. jwc. TextAreaScript"/> <set key="name" expression="textAreaScript. name"/> <set key="required" expression="textAreaScript. required"/> <set key="minimumLength" expression="textAreaScript. minimumLength"/> <set key="maximumLength" expression="textAreaScript. maximumLength"/> <set key="requiredMessage" expression="textAreaScript. requiredMessage"/> <set key="minimumLengthMessage" expression="textAreaScript. minimumLengthMessage"/> <set key="maximumLengthMessage" expression="textAreaScript. maximumLengthMessage"/> <set key="numberFormatEnable" expression="textAreaScript. numberFormatEnable"/> <set key="numberLengthMessage" expression="textAreaScript. numberLengthMessage"/> <set key="numberLength" expression="textAreaScript. numberLength"/> <let key="baseName">   document.$ {textAreaScript. form. name }.$ {name }        </let> <let key="formValidateFunction" unique="yes">   validate_$ {name }        </let> <body> <! [CDATA [ function $ {formValidateFunction } ( ) {   var field = $ {baseName };   var keycode = window. event. keyCode;     if ( $ {numberFormatEnable } && !field. value. match (/^/d { 11 }$/ ) )   {           if ( field. value. length == 0 )                   return true;         return validator_invalid_field (field, "$ {numberLengthMessage }" );   }                     if ( $ {required } && field. value. length== 0 )   {           return validator_invalid_field (field, "$ {requiredMessage }" );   }                     if ( $ {required } && field. value. length<$ {minimumLength } )   {       return validator_invalid_field (field, "$ {minimumLengthMessage }" );   }                     if ( $ {required } && field. value. length>$ {maximumLength } )   {       return validator_invalid_field (field, "$ {maximumLengthMessage }" );   }   return true; } ] ]> </body> </script>

我这段代码另外还有个功能，是效验11位手机号码，因为11的长度远大于Tapestry提动的NumberValidator范围，没办法，只好自己写了，想偷懒都不行。