Maven polyglot

maven-polyglot/maven-polyglot-json-extension/pom.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>com.baeldung.maven.polyglot</groupId>
+    <artifactId>maven-polyglot-json-extension</artifactId>
+    <version>1.0-SNAPSHOT</version>
+
+    <properties>
+        <maven.compiler.source>1.8</maven.compiler.source>
+        <maven.compiler.target>1.8</maven.compiler.target>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.apache.maven</groupId>
+            <artifactId>maven-core</artifactId>
+            <version>3.5.4</version>
+            <scope>provided</scope>
+        </dependency>
+        <dependency>
+            <groupId>com.fasterxml.jackson.core</groupId>
+            <artifactId>jackson-databind</artifactId>
+            <version>2.9.6</version>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.codehaus.plexus</groupId>
+                <artifactId>plexus-component-metadata</artifactId>
+                <version>1.7.1</version>
+                <executions>
+                    <execution>
+                        <goals>
+                            <goal>generate-metadata</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>

maven-polyglot/maven-polyglot-json-extension/src/main/java/com/demo/polyglot/CustomModelProcessor.java

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+package com.demo.polyglot;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import org.apache.maven.model.Model;
+import org.apache.maven.model.building.FileModelSource;
+import org.apache.maven.model.building.ModelProcessor;
+import org.apache.maven.model.io.ModelParseException;
+import org.apache.maven.model.io.ModelReader;
+import org.codehaus.plexus.component.annotations.Component;
+import org.codehaus.plexus.component.annotations.Requirement;
+import org.codehaus.plexus.util.ReaderFactory;
+
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.Reader;
+import java.util.Map;
+
+@Component(role = ModelProcessor.class)
+public class CustomModelProcessor implements ModelProcessor {
+
+    private static final String XML_POM = "pom.xml";
+    private static final String JSON_POM = "pom.json";
+    private static final String JSON_EXT = ".json";
+
+    ObjectMapper objectMapper = new ObjectMapper();
+
+    @Requirement
+    private ModelReader modelReader;
+
+    @Override
+    public File locatePom(File projectDirectory) {
+        File pomFile = new File(projectDirectory, JSON_POM);
+        if (!pomFile.exists()) {
+            pomFile = new File(projectDirectory, XML_POM);
+        }
+        return pomFile;
+    }
+
+    @Override
+    public Model read(InputStream input, Map<String, ?> options) throws IOException, ModelParseException {
+        try (final Reader in = ReaderFactory.newPlatformReader(input)) {
+            return read(in, options);
+        }
+    }
+
+    @Override
+    public Model read(Reader reader, Map<String, ?> options) throws IOException, ModelParseException {
+        FileModelSource source = (options != null) ? (FileModelSource) options.get(SOURCE) : null;
+        if (source != null && source.getLocation().endsWith(JSON_EXT)) {
+            Model model = objectMapper.readValue(reader, Model.class);
+            return model;
+        }
+        //It's a normal maven project with a pom.xml file
+        return modelReader.read(reader, options);
+    }
+
+    @Override
+    public Model read(File input, Map<String, ?> options) throws IOException, ModelParseException {
+        return null;
+    }
+}