SEAMVALIDATE-22, extend the helloworld example

examples/helloworld/src/main/java/org/jboss/seam/validation/BannedNames.java

@@ -0,0 +1,40 @@
+/**
+ * JBoss, Home of Professional Open Source
+ *
+ * Copyright 2011, Red Hat, Inc., and individual contributors
+ * by the @authors tag. See the copyright.txt in the distribution for a
+ * full listing of individual contributors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *         http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.jboss.seam.validation;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.Retention;
+import java.lang.annotation.Target;
+
+import javax.inject.Qualifier;
+
+import static java.lang.annotation.ElementType.FIELD;
+import static java.lang.annotation.ElementType.METHOD;
+import static java.lang.annotation.ElementType.PARAMETER;
+import static java.lang.annotation.ElementType.TYPE;
+import static java.lang.annotation.RetentionPolicy.RUNTIME;
+
+@Qualifier
+@Target({ TYPE, METHOD, PARAMETER, FIELD })
+@Retention(RUNTIME)
+@Documented
+public @interface BannedNames {
+
+}

examples/helloworld/src/main/java/org/jboss/seam/validation/BannedNamesList.java

@@ -0,0 +1,40 @@
+/**
+ * JBoss, Home of Professional Open Source
+ *
+ * Copyright 2011, Red Hat, Inc., and individual contributors
+ * by the @authors tag. See the copyright.txt in the distribution for a
+ * full listing of individual contributors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *         http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.jboss.seam.validation;
+
+import java.util.Collection;
+import java.util.HashSet;
+
+import javax.enterprise.context.ApplicationScoped;
+import javax.enterprise.inject.Produces;
+
+public class BannedNamesList {    
+    @Produces
+    @BannedNames
+    @ApplicationScoped
+    Collection<String> getBannedNames() {
+        Collection<String> bannedNames = new HashSet<String> ();
+        bannedNames.add("root");
+        bannedNames.add("admin");
+        bannedNames.add("foo bar");
+
+        return bannedNames;
+    }
+}

examples/helloworld/src/main/java/org/jboss/seam/validation/HelloWorldService.java

@@ -23,15 +23,33 @@
 import javax.validation.constraints.NotNull;
 import javax.validation.constraints.Size;
 
+import org.hibernate.validator.constraints.NotEmpty;
+
 @ApplicationScoped
 @AutoValidating
 public class HelloWorldService {
 
     public HelloWorldService() {
     }
+
+    @Size(max = 16)
+    public String composeName(@NotNull @NotEmpty String firstName, @NotNull String middleName, @NotNull String lastName) {
+        StringBuffer name = new StringBuffer(firstName);
+
+        if (middleName.length() > 0) {
+            name.append(' ');
+            name.append(middleName);           
+        }
+
+        if (lastName.length() > 0) {
+            name.append(' ');
+            name.append(lastName);
+        }
+
+        return name.toString();
+    }
 
-    public String sayHello(@NotNull @Size(min = 3) String name) {
+    public String sayHello(@NotNull @Size(min = 3) @NotBanned String name) {
         return "Hello, " + name + "!";
     }
-
 }

examples/helloworld/src/main/java/org/jboss/seam/validation/HelloWorldServlet.java

@@ -20,6 +20,7 @@
 package org.jboss.seam.validation;
 
 import java.io.IOException;
+import java.util.Collection;
 
 import javax.inject.Inject;
 import javax.servlet.ServletException;
@@ -33,15 +34,21 @@ public class HelloWorldServlet extends HttpServlet {
 
     @Inject
     private HelloWorldService service;
+
+    @Inject
+    @BannedNames
+    private Collection<String> bannedNames;
 
     protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
 
         response.setContentType("text/html");
         response.setStatus(HttpServletResponse.SC_OK);
 
-        String name = request.getParameter("name");
-        if (name != null) {
-            response.getWriter().println("<h1>" + service.sayHello(name) + "</h1>");
+        String firstName = request.getParameter("firstName");
+        String middleName = request.getParameter("middleName");
+        String lastName = request.getParameter("lastName");
+        if (firstName != null && middleName != null && lastName != null) {
+            response.getWriter().println("<h1>" + service.sayHello(service.composeName(firstName, middleName, lastName)) + "</h1>");
         } else {
             response.getWriter().println("<?xml version=\"1.0\" ?>");
             response.getWriter()
@@ -51,11 +58,22 @@ protected void doGet(HttpServletRequest request, HttpServletResponse response) t
             response.getWriter().println("   <head><title>Seam Validation Module Example</title></head>");
             response.getWriter().println("   <body>");
             response.getWriter().println("      <h1>Seam Validation Module Example - Method Validation</h1>");
-            response.getWriter().println("      <p>Hi, what's your name? Enter at least three characters.</p>");
+            response.getWriter().println("      <p>Hi, what's your name? </p>");
+            response.getWriter().println("      <p>Your First Name must not be empty.</p>");
+            response.getWriter().println("      <p>Your whole name must have at least three and at most sixteen characters.</p>");
+            response.getWriter().println("      <p>Your name must not contain any of the banned names list (see below).</p>");
             response.getWriter().println("      <form action=\"HelloWorld\">");
-            response.getWriter().println("         Name: <input name=\"name\" type=\"text\" size=\"30\">");
-            response.getWriter().println("         <input type=\"submit\" value=\" OK \">");
+            response.getWriter().println("         <div>First Name: <input name=\"firstName\" type=\"text\" size=\"15\"></div>");
+            response.getWriter().println("         <div>Middle Name: <input name=\"middleName\" type=\"text\" size=\"15\"></div>");
+            response.getWriter().println("         <div>Last Name: <input name=\"lastName\" type=\"text\" size=\"15\"></div>");
+            response.getWriter().println("         <div><input type=\"submit\" value=\" OK \"></div>");
             response.getWriter().println("      </form>");
+
+            response.getWriter().println("<h2>Banned names list</h2>");
+            for (String name : bannedNames) {
+                response.getWriter().println("<div>" + name + "</div>");
+            }
+
             response.getWriter().println("   </body>");
             response.getWriter().println("</html>");
         }

examples/helloworld/src/main/java/org/jboss/seam/validation/NotBanned.java

@@ -0,0 +1,40 @@
+/**
+ * JBoss, Home of Professional Open Source
+ *
+ * Copyright 2011, Red Hat, Inc., and individual contributors
+ * by the @authors tag. See the copyright.txt in the distribution for a
+ * full listing of individual contributors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *         http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.jboss.seam.validation;
+
+import static java.lang.annotation.ElementType.*;
+import static java.lang.annotation.RetentionPolicy.*;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.Retention;
+import java.lang.annotation.Target;
+
+import javax.validation.Constraint;
+import javax.validation.Payload;
+
+@Target( { METHOD, FIELD, ANNOTATION_TYPE, PARAMETER })
+@Retention(RUNTIME)
+@Constraint(validatedBy = NotBannedValidator.class)
+@Documented
+public @interface NotBanned {
+    String message() default "Fails the banned filter";
+    Class<?>[] groups() default {};
+    Class<? extends Payload>[] payload() default {};
+}

examples/helloworld/src/main/java/org/jboss/seam/validation/NotBannedValidator.java

@@ -0,0 +1,58 @@
+/**
+ * JBoss, Home of Professional Open Source
+ *
+ * Copyright 2011, Red Hat, Inc., and individual contributors
+ * by the @authors tag. See the copyright.txt in the distribution for a
+ * full listing of individual contributors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *         http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.jboss.seam.validation;
+
+import java.util.Collection;
+import java.util.regex.Pattern;
+
+import javax.inject.Inject;
+import javax.validation.ConstraintValidator;
+import javax.validation.ConstraintValidatorContext;
+
+public class NotBannedValidator implements ConstraintValidator<NotBanned, String> {
+
+    /*
+     * Note that the Seam Validation constraint factory (org.jboss.seam.validation.InjectingConstraintValidatorFactory) 
+     * must be enabled in META-INF/validation.xml for the dependency injection to work in constraint validators.
+     */
+    @Inject
+    @BannedNames
+    private Collection<String> bannedNames;
+
+    private Pattern pattern;
+
+    @Override
+    public void initialize(NotBanned annotation) {
+        // We build a pattern matching all the banned names
+        StringBuilder regex = new StringBuilder();
+        for (String name : bannedNames) {
+            if (regex.length() > 0) {
+                regex.append('|');
+            }
+            regex.append(name);
+        }
+        pattern = Pattern.compile(regex.toString(), Pattern.CASE_INSENSITIVE);
+    }
+
+    @Override
+    public boolean isValid(String name, ConstraintValidatorContext context) {        
+        return !pattern.matcher(name).find();
+    }
+}

examples/helloworld/src/main/resources/META-INF/validation.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<validation-config 
+   xmlns="http://jboss.org/xml/ns/javax/validation/configuration" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+   xsi:schemaLocation="http://jboss.org/xml/ns/javax/validation/configuration validation-configuration-1.0.xsd">
+
+   <constraint-validator-factory>
+      org.jboss.seam.validation.InjectingConstraintValidatorFactory
+   </constraint-validator-factory>
+
+</validation-config>