001    // Copyright 2007, 2008, 2009, 2010 The Apache Software Foundation
002    //
003    // Licensed under the Apache License, Version 2.0 (the "License");
004    // you may not use this file except in compliance with the License.
005    // You may obtain a copy of the License at
006    //
007    // http://www.apache.org/licenses/LICENSE-2.0
008    //
009    // Unless required by applicable law or agreed to in writing, software
010    // distributed under the License is distributed on an "AS IS" BASIS,
011    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012    // See the License for the specific language governing permissions and
013    // limitations under the License.
014    
015    package org.apache.tapestry5.beaneditor;
016    
017    import static java.lang.annotation.RetentionPolicy.RUNTIME;
018    import static org.apache.tapestry5.ioc.annotations.AnnotationUseContext.BEAN;
019    import static org.apache.tapestry5.ioc.annotations.AnnotationUseContext.COMPONENT;
020    import static org.apache.tapestry5.ioc.annotations.AnnotationUseContext.MIXIN;
021    import static org.apache.tapestry5.ioc.annotations.AnnotationUseContext.PAGE;
022    
023    import java.lang.annotation.Documented;
024    import java.lang.annotation.ElementType;
025    import java.lang.annotation.Retention;
026    import java.lang.annotation.Target;
027    
028    import org.apache.tapestry5.ioc.annotations.UseWith;
029    
030    /**
031     * Used to attach validation constraints directly to a property (either the getter or the setter method). The annotation
032     * value is a comma separated list of <em>validation constraints</em>, each one identifying a validator type (such as
033     * "required", "minlength") and optionally, a constraint value. Most validators need a constraint value, which is
034     * separated from the type by an equals size (i.e., "maxlength=30"). In addition, the value may include
035     * validator macros.
036     * <p/>
037     * May be placed on any getter or setter method, or on the matching field.
038     * 
039     * @see Translate
040     */
041    @Target(
042    { ElementType.FIELD, ElementType.METHOD })
043    @Retention(RUNTIME)
044    @Documented
045    @UseWith(
046    { BEAN, COMPONENT, MIXIN, PAGE })
047    public @interface Validate
048    {
049        String value();
050    }