[MNG-8761] Add Maven 3 MavenToolchainsXpp3Reader/Writer

compat/maven-toolchain-model/pom.xml

@@ -32,6 +32,10 @@ under the License.
   <description>Maven Toolchain model.</description>
 
   <dependencies>
+    <dependency>
+      <groupId>org.apache.maven</groupId>
+      <artifactId>maven-support</artifactId>
+    </dependency>
     <dependency>
       <groupId>org.apache.maven</groupId>
       <artifactId>maven-api-toolchain</artifactId>

compat/maven-toolchain-model/src/main/java/org/apache/maven/toolchain/model/io/xpp3/MavenToolchainsXpp3Reader.java

@@ -0,0 +1,151 @@
+/*
+ * 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
+ *
+ *   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.apache.maven.toolchain.model.io.xpp3;
+
+import javax.xml.stream.XMLStreamException;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.Reader;
+
+import org.apache.maven.toolchain.model.PersistedToolchains;
+import org.apache.maven.toolchain.v4.MavenToolchainsStaxReader;
+import org.codehaus.plexus.util.xml.XmlStreamReader;
+import org.codehaus.plexus.util.xml.pull.XmlPullParser;
+import org.codehaus.plexus.util.xml.pull.XmlPullParserException;
+
+/**
+ *
+ * @deprecated use MavenToolchainsStaxReader.
+ */
+@Deprecated(since = "4.0.0")
+public class MavenToolchainsXpp3Reader {
+
+    private final MavenToolchainsStaxReader delegate;
+
+    public MavenToolchainsXpp3Reader() {
+        delegate = new MavenToolchainsStaxReader();
+    }
+
+    public MavenToolchainsXpp3Reader(ContentTransformer contentTransformer) {
+        delegate = contentTransformer != null
+                ? new MavenToolchainsStaxReader(contentTransformer::transform)
+                : new MavenToolchainsStaxReader();
+    }
+
+    /**
+     * Sets the state of the "add default entities" flag.
+     *
+     * @param addDefaultEntities a addDefaultEntities object.
+     */
+    public void setAddDefaultEntities(boolean addDefaultEntities) {
+        delegate.setAddDefaultEntities(addDefaultEntities);
+    }
+
+    /**
+     * Returns the state of the "add default entities" flag.
+     *
+     * @return boolean
+     */
+    public boolean getAddDefaultEntities() {
+        return delegate.getAddDefaultEntities();
+    }
+
+    /**
+     * Method read.
+     *
+     * @param parser a parser object.
+     * @param strict a strict object.
+     * @return PersistedToolchains
+     * @throws IOException IOException if any.
+     * @throws XmlPullParserException XmlPullParserException if
+     *         any.
+     */
+    public PersistedToolchains read(XmlPullParser parser, boolean strict) throws IOException, XmlPullParserException {
+        throw new UnsupportedOperationException("Not yet implemented");
+    }
+
+    /**
+     * @param reader a reader object.
+     * @param strict a strict object.
+     * @return PersistedToolchains
+     * @throws IOException IOException if any.
+     * @throws XmlPullParserException XmlPullParserException if
+     *         any.
+     * @see XmlStreamReader
+     */
+    public PersistedToolchains read(Reader reader, boolean strict) throws IOException, XmlPullParserException {
+        try {
+            return new PersistedToolchains(delegate.read(reader, strict, null));
+        } catch (XMLStreamException e) {
+            throw new XmlPullParserException(e.getMessage(), null, e);
+        }
+    }
+
+    /**
+     * @param reader a reader object.
+     * @return PersistedToolchains
+     * @throws IOException IOException if any.
+     * @throws XmlPullParserException XmlPullParserException if
+     *         any.
+     * @see XmlStreamReader
+     */
+    public PersistedToolchains read(Reader reader) throws IOException, XmlPullParserException {
+        return read(reader, true);
+    }
+
+    /**
+     * Method read.
+     *
+     * @param in a in object.
+     * @param strict a strict object.
+     * @return PersistedToolchains
+     * @throws IOException IOException if any.
+     * @throws XmlPullParserException XmlPullParserException if
+     *         any.
+     */
+    public PersistedToolchains read(InputStream in, boolean strict) throws IOException, XmlPullParserException {
+        return read(new XmlStreamReader(in), strict);
+    }
+
+    /**
+     * Method read.
+     *
+     * @param in a in object.
+     * @return PersistedToolchains
+     * @throws IOException IOException if any.
+     * @throws XmlPullParserException XmlPullParserException if
+     *         any.
+     */
+    public PersistedToolchains read(InputStream in) throws IOException, XmlPullParserException {
+        return read(new XmlStreamReader(in));
+    }
+
+    public interface ContentTransformer {
+        /**
+         * Interpolate the value read from the xpp3 document
+         *
+         * @param source The source value
+         * @param fieldName A description of the field being interpolated. The implementation may use this to
+         *         log stuff.
+         * @return The interpolated value.
+         */
+        String transform(String source, String fieldName);
+    }
+}

compat/maven-toolchain-model/src/main/java/org/apache/maven/toolchain/model/io/xpp3/MavenToolchainsXpp3Writer.java

@@ -0,0 +1,85 @@
+/*
+ * 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
+ *
+ *   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.apache.maven.toolchain.model.io.xpp3;
+
+import javax.xml.stream.XMLStreamException;
+
+import java.io.IOException;
+import java.io.OutputStream;
+import java.io.Writer;
+
+import org.apache.maven.toolchain.model.PersistedToolchains;
+import org.apache.maven.toolchain.v4.MavenToolchainsStaxWriter;
+
+/**
+ *
+ * @deprecated use MavenToolchainsStaxWriter.
+ */
+@Deprecated(since = "4.0.0")
+public class MavenToolchainsXpp3Writer {
+    // --------------------------/
+    // - Class/Member Variables -/
+    // --------------------------/
+
+    private final MavenToolchainsStaxWriter delegate;
+
+    public MavenToolchainsXpp3Writer() {
+        delegate = new MavenToolchainsStaxWriter();
+        delegate.setAddLocationInformation(false);
+    }
+
+    /**
+     * Method setFileComment.
+     *
+     * @param fileComment a fileComment object.
+     */
+    public void setFileComment(String fileComment) {
+        delegate.setFileComment(fileComment);
+    }
+
+    /**
+     * Method write.
+     *
+     * @param writer a writer object.
+     * @param persistedToolchains a persistedToolchains object.
+     * @throws IOException java.io.IOException if any.
+     */
+    public void write(Writer writer, PersistedToolchains persistedToolchains) throws IOException {
+        try {
+            delegate.write(writer, persistedToolchains.getDelegate());
+        } catch (XMLStreamException e) {
+            throw new IOException(e);
+        }
+    }
+
+    /**
+     * Method write.
+     *
+     * @param stream a stream object.
+     * @param persistedToolchains a persistedToolchains object.
+     * @throws IOException java.io.IOException if any.
+     */
+    public void write(OutputStream stream, PersistedToolchains persistedToolchains) throws IOException {
+        try {
+            delegate.write(stream, persistedToolchains.getDelegate());
+        } catch (XMLStreamException e) {
+            throw new IOException(e);
+        }
+    }
+}