Merge pull request #161 from twogee/jakarta-mail

Use Jakarta EE

11 files changed, 498 insertions, 13 deletions

diff --git a/build.xml b/build.xml
index bd40a804a..7bbad00ee 100644
--- a/build.xml
+++ b/build.xml
@@ -277,6 +277,12 @@
     </or>
   </selector>
 
+  <selector id="needs.jakartamail">
+    <or>
+      <filename name="${ant.package}/taskdefs/email/JakartaMimeMailer*"/>
+    </or>
+  </selector>
+
   <selector id="needs.netrexx">
     <filename name="${optional.package}/NetRexxC*"/>
   </selector>
@@ -360,6 +366,7 @@
         <selector refid="needs.imageio"/>
         <selector refid="needs.jai"/>
         <selector refid="needs.javamail"/>
+        <selector refid="needs.jakartamail"/>
         <selector refid="needs.jdepend"/>
         <selector refid="needs.jmf"/>
         <selector refid="needs.jsch"/>
@@ -507,6 +514,9 @@
     <available property="javamail.present"
                classname="javax.mail.Transport"
                classpathref="classpath" ignoresystemclasses="${ignoresystemclasses}"/>
+    <available property="jakartamail.present"
+               classname="jakarta.mail.Transport"
+               classpathref="classpath" ignoresystemclasses="${ignoresystemclasses}"/>
     <available property="graaljs.present"
                classname="com.oracle.truffle.js.scriptengine.GraalJSScriptEngine"
                classpathref="classpath" ignoresystemclasses="${ignoresystemclasses}"/>
@@ -704,6 +714,7 @@
             <selector refid="needs.commons-logging" unless="commons.logging.present"/>
             <selector refid="needs.apache-bsf" unless="bsf.present"/>
             <selector refid="needs.javamail" unless="javamail.present"/>
+            <selector refid="needs.jakartamail" unless="jakartamail.present"/>
             <selector refid="needs.netrexx" unless="netrexx.present"/>
             <selector refid="needs.commons-net" unless="commons.net.present"/>
             <selector refid="needs.antlr" unless="antlr.present"/>
@@ -867,6 +878,7 @@
     <optional-jar dep="commons-logging"/>
     <optional-jar dep="apache-bsf"/>
     <optional-jar dep="javamail"/>
+    <optional-jar dep="jakartamail"/>
     <optional-jar dep="netrexx"/>
     <optional-jar dep="commons-net"/>
     <optional-jar dep="antlr"/>
@@ -962,6 +974,7 @@
     <optional-src-jar dep="commons-logging"/>
     <optional-src-jar dep="apache-bsf"/>
     <optional-src-jar dep="javamail"/>
+    <optional-src-jar dep="jakartamail"/>
     <optional-src-jar dep="netrexx"/>
     <optional-src-jar dep="commons-net"/>
     <optional-src-jar dep="antlr"/>
diff --git a/fetch.xml b/fetch.xml
index 24e8e6df4..288700cdd 100644
--- a/fetch.xml
+++ b/fetch.xml
@@ -335,6 +335,12 @@ Set -Ddest=LOCATION on the command line
     <f2 project="which"/>
   </target>
 
+  <target name="javamail"
+          description="load Java Mail"
+          depends="init">
+    <f2 project="com.sun.mail" archive="javax.mail"/>
+  </target>
+
   <target name="jakartamail"
           description="load Jakarta Mail"
           depends="init">
diff --git a/lib/libraries.properties b/lib/libraries.properties
index ec536522e..349e199fb 100644
--- a/lib/libraries.properties
+++ b/lib/libraries.properties
@@ -51,7 +51,9 @@ hamcrest-core.version=1.3
 hamcrest-library.version=${hamcrest-core.version}
 jai-core.version=1.1.3
 jai-codec.version=1.1.3
-jakarta.mail.version=1.6.4
+# Later 1.6 versions call themselves "jakarta.mail" but do not use the namespace yet
+javax.mail.version=1.6.2
+jakarta.mail.version=2.0.1
 jakarta-regexp.version=1.4
 # Later versions of Tomcat provide a jspc task
 jasper-compiler.version=4.1.36
diff --git a/src/etc/poms/ant-jakartamail/pom.xml b/src/etc/poms/ant-jakartamail/pom.xml
new file mode 100644
index 000000000..4d17f87ac
--- /dev/null
+++ b/src/etc/poms/ant-jakartamail/pom.xml
@@ -0,0 +1,98 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+   Licensed to the Apache Software Foundation (ASF) under one or more
+   contributor license agreements.  See the NOTICE file distributed with
+   this work for additional information regarding copyright ownership.
+   The ASF licenses this file to You 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
+
+       https://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.
+-->
+<!--
+  This POM has been created manually by the Ant Development Team.
+  Please contact us if you are not satisfied with the data contained in this POM.
+  URL : https://ant.apache.org
+-->
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/maven-v4_0_0.xsd">
+  <parent>
+    <groupId>org.apache.ant</groupId>
+    <artifactId>ant-parent</artifactId>
+    <relativePath>../pom.xml</relativePath>
+    <version>1.10.12-SNAPSHOT</version>
+  </parent>
+  <modelVersion>4.0.0</modelVersion>
+  <url>https://ant.apache.org/</url>
+  <groupId>org.apache.ant</groupId>
+  <artifactId>ant-jakartamail</artifactId>
+  <version>1.10.12-SNAPSHOT</version>
+  <name>Apache Ant + JakartaMail</name>
+  <description>implementation of the mail task based on Jakarta EE mail.
+    Required to send emails to SMTP servers using user/password combinations
+  or to send mail over SSL</description>
+  <dependencies>
+    <dependency>
+      <groupId>org.apache.ant</groupId>
+      <artifactId>ant</artifactId>
+      <version>1.10.12-SNAPSHOT</version>
+      <scope>compile</scope>
+    </dependency>
+    <dependency>
+      <!-- This brings in the necessary dependencies.
+      See https://eclipse-ee4j.github.io/mail/ -->
+      <groupId>com.sun.mail</groupId>
+      <artifactId>jakarta.mail</artifactId>
+      <version>2.0.1</version>
+      <scope>compile</scope>
+    </dependency>
+  </dependencies>
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-compiler-plugin</artifactId>
+        <configuration>
+          <includes>
+            <include>org/apache/tools/ant/taskdefs/email/JakartaMimeMailer*</include>
+          </includes>
+        </configuration>
+      </plugin>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-jar-plugin</artifactId>
+        <configuration>
+          <archive>
+            <index>true</index>
+            <manifest>
+              <addExtensions>true</addExtensions>
+              <addDefaultImplementationEntries>true</addDefaultImplementationEntries>
+              <addDefaultSpecificationEntries>true</addDefaultSpecificationEntries>
+            </manifest>
+          </archive>
+        </configuration>
+      </plugin>
+    </plugins>
+    <resources>
+      <resource>
+        <directory>../../../..</directory>
+        <targetPath>META-INF</targetPath>
+        <includes>
+          <include>LICENSE</include>
+          <include>NOTICE</include>
+        </includes>
+      </resource>
+    </resources>
+    <sourceDirectory>../../../../src/main</sourceDirectory>
+    <testSourceDirectory>../../../../src/testcases</testSourceDirectory>
+    <outputDirectory>../../../../target/${project.artifactId}/classes</outputDirectory>
+    <testOutputDirectory>../../../../target/${project.artifactId}/testcases</testOutputDirectory>
+    <directory>../../../../target/${project.artifactId}</directory>
+  </build>
+</project>
diff --git a/src/etc/poms/ant-javamail/pom.xml b/src/etc/poms/ant-javamail/pom.xml
index 26a6b787b..05b2dec8d 100644
--- a/src/etc/poms/ant-javamail/pom.xml
+++ b/src/etc/poms/ant-javamail/pom.xml
@@ -48,8 +48,8 @@ xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/m
       <!-- This brings in the necessary dependencies.
       See https://eclipse-ee4j.github.io/mail/ -->
       <groupId>com.sun.mail</groupId>
-      <artifactId>jakarta.mail</artifactId>
-      <version>1.6.4</version>
+      <artifactId>javax.mail</artifactId>
+      <version>1.6.2</version>
       <scope>compile</scope>
     </dependency>
   </dependencies>
diff --git a/src/etc/poms/ant/pom.xml b/src/etc/poms/ant/pom.xml
index d52bc2683..8ce508b84 100644
--- a/src/etc/poms/ant/pom.xml
+++ b/src/etc/poms/ant/pom.xml
@@ -160,7 +160,7 @@
             <exclude>org/apache/tools/ant/launch/</exclude>
             <exclude>org/apache/tools/ant/listener/CommonsLoggingListener*</exclude>
             <exclude>org/apache/tools/ant/listener/Log4jListener*</exclude>
-            <exclude>org/apache/tools/ant/taskdefs/email/MimeMailer*</exclude>
+            <exclude>org/apache/tools/ant/taskdefs/email/*MimeMailer*</exclude>
             <exclude>${modules.exclude}</exclude>
             <exclude>org/apache/tools/ant/taskdefs/optional/NetRexxC*</exclude>
             <exclude>org/apache/tools/ant/taskdefs/optional/Xalan2TraceSupport*</exclude>
diff --git a/src/etc/poms/pom.xml b/src/etc/poms/pom.xml
index 3ab41dbd5..893ceee66 100644
--- a/src/etc/poms/pom.xml
+++ b/src/etc/poms/pom.xml
@@ -95,6 +95,7 @@
     <module>ant-imageio</module>
     <module>ant-jai</module>
     <module>ant-javamail</module>
+    <module>ant-jakartamail</module>
     <module>ant-jdepend</module>
     <module>ant-jmf</module>
     <module>ant-jsch</module>
diff --git a/src/main/org/apache/tools/ant/taskdefs/email/EmailTask.java b/src/main/org/apache/tools/ant/taskdefs/email/EmailTask.java
index 54f811743..5336d06fd 100644
--- a/src/main/org/apache/tools/ant/taskdefs/email/EmailTask.java
+++ b/src/main/org/apache/tools/ant/taskdefs/email/EmailTask.java
@@ -449,16 +449,9 @@ public class EmailTask extends Task {
             // prepare for the auto select mechanism
             boolean autoFound = false;
             // try MIME format
-            if (MIME.equals(encoding)
-                 || (AUTO.equals(encoding) && !autoFound)) {
+            if (MIME.equals(encoding) || AUTO.equals(encoding)) {
                 try {
-                    //check to make sure that activation.jar
-                    //and mail.jar are available - see bug 31969
-                    Class.forName("javax.activation.DataHandler");
-                    Class.forName("javax.mail.internet.MimeMessage");
-
-                    mailer = ClasspathUtils.newInstance(
-                            "org.apache.tools.ant.taskdefs.email.MimeMailer",
+                    mailer = ClasspathUtils.newInstance(getMailerImplementation(),
                             EmailTask.class.getClassLoader(), Mailer.class);
                     autoFound = true;
 
@@ -600,6 +593,32 @@ public class EmailTask extends Task {
         }
     }
 
+    private String getMailerImplementation() {
+        //check to make sure that activation.jar
+        //and mail.jar are available - see bug 31969
+        try {
+            Class.forName("jakarta.activation.DataHandler");
+            Class.forName("jakarta.mail.internet.MimeMessage");
+
+            return "org.apache.tools.ant.taskdefs.email.JakartaMimeMailer";
+        } catch (ClassNotFoundException cnfe) {
+            logBuildException("Could not find Jakarta MIME mail: ",
+                    new BuildException(cnfe));
+        }
+
+        try {
+            Class.forName("javax.activation.DataHandler");
+            Class.forName("javax.mail.internet.MimeMessage");
+
+            return "org.apache.tools.ant.taskdefs.email.MimeMailer";
+        } catch (ClassNotFoundException cnfe) {
+            logBuildException("Could not find MIME mail: ",
+                    new BuildException(cnfe));
+        }
+
+        return "org.apache.tools.ant.taskdefs.email.Mailer";
+    }
+
     private void logBuildException(String reason, BuildException e) {
         Throwable t = e.getCause() == null ? e : e.getCause();
         log(reason + t.getMessage(), Project.MSG_WARN);
diff --git a/src/main/org/apache/tools/ant/taskdefs/email/JakartaMimeMailer.java b/src/main/org/apache/tools/ant/taskdefs/email/JakartaMimeMailer.java
new file mode 100644
index 000000000..80d3fda37
--- /dev/null
+++ b/src/main/org/apache/tools/ant/taskdefs/email/JakartaMimeMailer.java
@@ -0,0 +1,340 @@
+/*
+ *  Licensed to the Apache Software Foundation (ASF) under one or more
+ *  contributor license agreements.  See the NOTICE file distributed with
+ *  this work for additional information regarding copyright ownership.
+ *  The ASF licenses this file to You 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
+ *
+ *      https://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.apache.tools.ant.taskdefs.email;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.io.PrintStream;
+import java.io.UnsupportedEncodingException;
+import java.security.Provider;
+import java.security.Security;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Locale;
+import java.util.Properties;
+import java.util.StringTokenizer;
+import java.util.Vector;
+
+import jakarta.activation.DataHandler;
+import jakarta.activation.DataSource;
+import jakarta.activation.FileDataSource;
+import jakarta.mail.Address;
+import jakarta.mail.Authenticator;
+import jakarta.mail.Message;
+import jakarta.mail.MessagingException;
+import jakarta.mail.PasswordAuthentication;
+import jakarta.mail.SendFailedException;
+import jakarta.mail.Session;
+import jakarta.mail.Transport;
+import jakarta.mail.internet.AddressException;
+import jakarta.mail.internet.InternetAddress;
+import jakarta.mail.internet.MimeBodyPart;
+import jakarta.mail.internet.MimeMessage;
+import jakarta.mail.internet.MimeMultipart;
+
+import org.apache.tools.ant.BuildException;
+import org.apache.tools.ant.Project;
+
+
+/**
+ * Uses the JakartaMail classes to send Mime format email.
+ *
+ * @since Ant 1.10.12
+ */
+public class JakartaMimeMailer extends Mailer {
+    private static final String SSL_FACTORY = "javax.net.ssl.SSLSocketFactory";
+
+    private static final String GENERIC_ERROR =
+        "Problem while sending mime mail:";
+
+    /** Default character set */
+    private static final String DEFAULT_CHARSET
+        = System.getProperty("file.encoding");
+
+    // To work properly with national charsets we have to use
+    // implementation of interface jakarta.activation.DataSource
+    /**
+     * String data source implementation.
+     */
+    class StringDataSource implements DataSource {
+        private String data = null;
+        private String type = null;
+        private String charset = null;
+        private ByteArrayOutputStream out;
+
+        @Override
+        public InputStream getInputStream() throws IOException {
+            if (data == null && out == null) {
+                throw new IOException("No data");
+            }
+            if (out != null) {
+                final String encodedOut = out.toString(charset);
+                data = (data != null) ? data.concat(encodedOut) : encodedOut;
+                out = null;
+            }
+            return new ByteArrayInputStream(data.getBytes(charset));
+        }
+
+        @Override
+        public OutputStream getOutputStream() throws IOException {
+            out = (out == null) ? new ByteArrayOutputStream() : out;
+            return out;
+        }
+
+        public void setContentType(final String type) {
+            this.type = type.toLowerCase(Locale.ENGLISH);
+        }
+
+        @Override
+        public String getContentType() {
+            if (type != null && type.indexOf("charset") > 0
+                && type.startsWith("text/")) {
+                return type;
+            }
+            // Must be like "text/plain; charset=windows-1251"
+            return (type != null ? type : "text/plain") +
+                    "; charset=" + charset;
+        }
+
+        @Override
+        public String getName() {
+            return "StringDataSource";
+        }
+
+        public void setCharset(final String charset) {
+            this.charset = charset;
+        }
+
+        public String getCharset() {
+            return charset;
+        }
+    }
+
+    /**
+     * Send the email.
+     *
+     * @throws BuildException if the email can't be sent.
+     */
+    @Override
+    public void send() {
+        try {
+            final Properties props = new Properties();
+
+            props.put("mail.smtp.host", host);
+            props.put("mail.smtp.port", String.valueOf(port));
+
+            // Aside, the JDK is clearly unaware of the Scottish
+            // 'session', which involves excessive quantities of
+            // alcohol :-)
+            Session sesh;
+            Authenticator auth = null;
+            if (SSL) {
+                try {
+                    final Provider p =
+                        Class.forName("com.sun.net.ssl.internal.ssl.Provider")
+                            .asSubclass(Provider.class).getDeclaredConstructor().newInstance();
+                    Security.addProvider(p);
+                } catch (final Exception e) {
+                    throw new BuildException(
+                        "could not instantiate ssl security provider, check that you have JSSE in your classpath");
+                }
+                // SMTP provider
+                props.put("mail.smtp.socketFactory.class", SSL_FACTORY);
+                props.put("mail.smtp.socketFactory.fallback", "false");
+                props.put("mail.smtps.host", host);
+                if (isPortExplicitlySpecified()) {
+                    props.put("mail.smtps.port", String.valueOf(port));
+                    props.put("mail.smtp.socketFactory.port",
+                              String.valueOf(port));
+                }
+            }
+            if (user != null || password != null) {
+                props.put("mail.smtp.auth", "true");
+                auth = new SimpleAuthenticator(user, password);
+            }
+            if (isStartTLSEnabled()) {
+                props.put("mail.smtp.starttls.enable", "true");
+            }
+            sesh = Session.getInstance(props, auth);
+
+            //create the message
+            final MimeMessage msg = new MimeMessage(sesh);
+            final MimeMultipart attachments = new MimeMultipart();
+
+            //set the sender
+            if (from.getName() == null) {
+                msg.setFrom(new InternetAddress(from.getAddress()));
+            } else {
+                msg.setFrom(new InternetAddress(from.getAddress(),
+                    from.getName()));
+            }
+            // set the reply to addresses
+            msg.setReplyTo(internetAddresses(replyToList));
+            msg.setRecipients(Message.RecipientType.TO,
+                internetAddresses(toList));
+            msg.setRecipients(Message.RecipientType.CC,
+                internetAddresses(ccList));
+            msg.setRecipients(Message.RecipientType.BCC,
+                internetAddresses(bccList));
+
+            // Choosing character set of the mail message
+            // First: looking it from MimeType
+            String charset = parseCharSetFromMimeType(message.getMimeType());
+            if (charset != null) {
+                // Assign/reassign message charset from MimeType
+                message.setCharset(charset);
+            } else {
+                // Next: looking if charset having explicit definition
+                charset = message.getCharset();
+                if (charset == null) {
+                    // Using default
+                    charset = DEFAULT_CHARSET;
+                    message.setCharset(charset);
+                }
+            }
+            // Using jakarta.activation.DataSource paradigm
+            final StringDataSource sds = new StringDataSource();
+            sds.setContentType(message.getMimeType());
+            sds.setCharset(charset);
+
+            if (subject != null) {
+                msg.setSubject(subject, charset);
+            }
+            msg.addHeader("Date", getDate());
+
+            if (headers != null) {
+                for (Header h : headers) {
+                    msg.addHeader(h.getName(), h.getValue());
+                }
+            }
+            final PrintStream out = new PrintStream(sds.getOutputStream());
+            message.print(out);
+            out.close();
+
+            final MimeBodyPart textbody = new MimeBodyPart();
+            textbody.setDataHandler(new DataHandler(sds));
+            attachments.addBodyPart(textbody);
+
+            for (File file : files) {
+                MimeBodyPart body = new MimeBodyPart();
+                if (!file.exists() || !file.canRead()) {
+                    throw new BuildException(
+                        "File \"%s\" does not exist or is not readable.",
+                        file.getAbsolutePath());
+                }
+                final FileDataSource fileData = new FileDataSource(file);
+                final DataHandler fileDataHandler = new DataHandler(fileData);
+
+                body.setDataHandler(fileDataHandler);
+                body.setFileName(file.getName());
+                attachments.addBodyPart(body);
+            }
+            msg.setContent(attachments);
+            try {
+                // Send the message using SMTP, or SMTPS if the host uses SSL
+                final Transport transport = sesh.getTransport(SSL ? "smtps" : "smtp");
+                transport.connect(host, user, password);
+                transport.sendMessage(msg, msg.getAllRecipients());
+            } catch (final SendFailedException sfe) {
+                if (!shouldIgnoreInvalidRecipients()) {
+                    throw new BuildException(GENERIC_ERROR, sfe);
+                }
+                if (sfe.getValidSentAddresses() == null
+                           || sfe.getValidSentAddresses().length == 0) {
+                    throw new BuildException("Couldn't reach any recipient",
+                                             sfe);
+                }
+                Address[] invalid = sfe.getInvalidAddresses();
+                if (invalid == null) {
+                    invalid = new Address[0];
+                }
+                for (Address address : invalid) {
+                    didntReach(address, "invalid", sfe);
+                }
+                Address[] validUnsent = sfe.getValidUnsentAddresses();
+                if (validUnsent == null) {
+                    validUnsent = new Address[0];
+                }
+                for (Address address : validUnsent) {
+                    didntReach(address, "valid", sfe);
+                }
+            }
+        } catch (MessagingException | IOException e) {
+            throw new BuildException(GENERIC_ERROR, e);
+        }
+    }
+
+    private static InternetAddress[] internetAddresses(final Vector<EmailAddress> list)
+        throws AddressException, UnsupportedEncodingException {
+
+        final List<InternetAddress> addrs = new ArrayList<>();
+
+        for (final EmailAddress addr : list) {
+            final String name = addr.getName();
+            addrs.add((name == null)
+                ? new InternetAddress(addr.getAddress())
+                : new InternetAddress(addr.getAddress(), name));
+        }
+        return addrs.toArray(new InternetAddress[addrs.size()]);
+    }
+
+    private String parseCharSetFromMimeType(final String type) {
+        if (type == null) {
+            return null;
+        }
+        final int pos = type.indexOf("charset");
+        if (pos < 0) {
+            return null;
+        }
+        // Assuming mime type in form "text/XXXX; charset=XXXXXX"
+        final StringTokenizer token = new StringTokenizer(type.substring(pos), "=; ");
+        token.nextToken(); // Skip 'charset='
+        return token.nextToken();
+    }
+
+    private void didntReach(final Address addr, final String category,
+                            final MessagingException ex) {
+        final String msg = "Failed to send mail to " + category + " address "
+            + addr + " because of " + ex.getMessage();
+        if (task != null) {
+            task.log(msg, Project.MSG_WARN);
+        } else {
+            System.err.println(msg);
+        }
+    }
+
+    static class SimpleAuthenticator extends Authenticator {
+        private String user = null;
+        private String password = null;
+
+        public SimpleAuthenticator(final String user, final String password) {
+            this.user = user;
+            this.password = password;
+        }
+
+        @Override
+        public PasswordAuthentication getPasswordAuthentication() {
+            return new PasswordAuthentication(user, password);
+        }
+    }
+}
+
diff --git a/src/main/org/apache/tools/ant/taskdefs/email/MimeMailer.java b/src/main/org/apache/tools/ant/taskdefs/email/MimeMailer.java
index 319c1dc7c..387078b8a 100644
--- a/src/main/org/apache/tools/ant/taskdefs/email/MimeMailer.java
+++ b/src/main/org/apache/tools/ant/taskdefs/email/MimeMailer.java
@@ -58,7 +58,9 @@ import org.apache.tools.ant.Project;
  * Uses the JavaMail classes to send Mime format email.
  *
  * @since Ant 1.5
+ * @deprecated see org.apache.tools.ant.taskdefs.email.JakartaMimeMailer
  */
+@Deprecated
 public class MimeMailer extends Mailer {
     private static final String SSL_FACTORY = "javax.net.ssl.SSLSocketFactory";
 
diff --git a/src/main/org/apache/tools/ant/util/ClasspathUtils.java b/src/main/org/apache/tools/ant/util/ClasspathUtils.java
index 9e9b2ddc5..e14ed3ef8 100644
--- a/src/main/org/apache/tools/ant/util/ClasspathUtils.java
+++ b/src/main/org/apache/tools/ant/util/ClasspathUtils.java
@@ -26,6 +26,7 @@ import org.apache.tools.ant.types.Path;
 import org.apache.tools.ant.types.Reference;
 
 import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Modifier;
 
 // CheckStyle:HideUtilityClassConstructorCheck OFF - bc
 
@@ -251,6 +252,9 @@ public class ClasspathUtils {
         try {
             @SuppressWarnings("unchecked")
             Class<T> clazz = (Class<T>) Class.forName(className, true, userDefinedLoader);
+            if (Modifier.isAbstract(clazz.getModifiers())) {
+                throw new BuildException("Abstract class " + className);
+            }
             T o = clazz.getDeclaredConstructor().newInstance();
             if (!expectedType.isInstance(o)) {
                 throw new BuildException(