"A context menu (also called contextual, shortcut, and popup or pop-up menu) is a menu in a graphical user interface (GUI) that appears upon user interaction, such as a right-click mouse operation. A context menu offers a limited set of choices that are available in the current state, or context, of the operating system or application. Usually the available choices are actions related to the selected object.

package org.lorainelab.igb.menu.api.model;
import java.util.Set;
import java.util.function.Function;

public class ContextMenuItem extends MenuItem {
    private ContextMenuSection menuSection = ContextMenuSection.APP;
    public ContextMenuItem(String menuLabel, Set<MenuItem> subMenuItems) {
        super(menuLabel, subMenuItems);
    }
    public ContextMenuItem(String menuLabel, Function<Void, Void> action) {
        super(menuLabel, action);
    }
    public void setMenuSection(ContextMenuSection menuSection) {
        this.menuSection = menuSection;
    }
    public ContextMenuSection getMenuSection() {
        return menuSection;
    }
}

package org.lorainelab.igb.menu.api.model;

public enum ContextMenuSection {
    INFORMATION,
    SEQUENCE,
    APP,
    UI_ACTION;
}

package org.lorainelab.igb.context.menu.api.quickstart;

import aQute.bnd.annotation.component.Component;
import java.io.InputStream;
import java.util.Arrays;
import java.util.List;
import java.util.Optional;
import org.lorainelab.igb.contextmenu.menuapi.AnnotationContextMenuProvider;
import org.lorainelab.igb.context.menu.MenuSectionmenu.api.model.AnnotationContextEvent;
import org.lorainelab.igb.menu.api.model.ContextMenuItem;
import org.lorainelab.igb.contextmenu.menuapi.model.AnnotationContextEventContextMenuSection;
import org.lorainelab.igb.contextmenu.menuapi.model.ContextMenuItemMenuIcon;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
 *
 * @author dcnorris
 */
@Component(immediate = true)
public class ContextMenuExtension implements AnnotationContextMenuProvider {
    private static final Logger loggerLOG = LoggerFactory.getLogger(ContextMenuExtension.class);
    private static final String ICONPATH = "terminal.png";
    @Override
    public Optional<ContextMenuItem>Optional<List<ContextMenuItem>> buildMenuItem(AnnotationContextEvent event) {
        ContextMenuItem contextMenuItem = new ContextMenuItem("Log Selection ids", (Void t) -> {
            event.getSelectedItems().stream().map(selectedSym -> selectedSym.getID()).forEach(loggerLOG::info);
            return t;
        });
        try (InputStream resourceAsStream = ContextMenuExtension.class.getClassLoader().getResourceAsStream(ICONPATH)) {
            contextMenuItem.setMenuIcon(new MenuIcon(resourceAsStream));
        } catch (Exception ex) {
            LOG.error(ex.getMessage(), ex);
        }
        contextMenuItem.setMenuSection(ContextMenuSection.INFORMATION);
        return Optional.ofNullable(Arrays.asList(contextMenuItem));
    }
}

<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>
    <parent>
        <groupId>org.lorainelab.igb</groupId>
        <artifactId>igb-project</artifactId>
        <version>9.0.0</version>
    </parent>
    <groupId>org.lorainelab.igb</groupId>
    <artifactId>org.lorainelab.igb.menu.api.quickstart</artifactId>
    <version>1.0.0</version>
    <packaging>bundle</packaging>
    <name>Context Menu Extension Quickstart</name>
    
    <dependencies>
        <dependency>
            <groupId>biz.aQute.bnd</groupId>
            <artifactId>bndlib</artifactId>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.lorainelab.igb</groupId>
            <artifactId>genometry</artifactId>
            <scope>provided</scope>
        </dependency>  
        <!--Start of logging dependencies-->
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <scope>provided</scope>
        </dependency>
        <!--End of logging dependencies-->
          <dependency>
            <groupId>org.lorainelab.igb</groupId>
            <artifactId>org.lorainelab.igb.menu.api</artifactId>
            <scope>provided</scope>
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.felix</groupId>
                <artifactId>maven-bundle-plugin</artifactId>
                <extensions>true</extensions>
                <executions>
                    <execution>
                        <id>build plugin repository</id>
    @Override
    public MenuSection getMenuSection() {
                        <goals>
                            <goal>
                                index
                            </goal>                       
                        </goals>
                        <phase>package</phase>
                        <configuration>
                            <obrRepository>${project.build.directory}</obrRepository>    
                          return MenuSection.INFORMATION;
    }
}

# Context Menu API Quickstart
A small example context menu extension that logs the ids of all selected SeqSymmetry objects

```java
package org.lorainelab.igb.context.menu.modelapi.quickstart;
import comaQute.googlebnd.commonannotation.iocomponent.BaseEncodingComponent;
import java.io.InputStream;
import java.util.Optional;
import org.lorainelab.igb.context.menu.AnnotationContextMenuProvider;
import org.apache.commons.io.IOUtilslorainelab.igb.context.menu.MenuSection;
import org.lorainelab.igb.context.menu.model.AnnotationContextEvent;
import org.lorainelab.igb.context.menu.model.ContextMenuItem;
import org.lorainelab.igb.context.menu.model.MenuIcon;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
 *
 * @author dcnorris
 */
public@Component(immediate class MenuIcon {
    private String encodedImage;= true)
public class ContextMenuExtension implements AnnotationContextMenuProvider {
    private static final Logger logger = LoggerFactory.getLogger(MenuIconContextMenuExtension.class);
    private static final String public MenuIcon(InputStream resourceAsStreamICONPATH = "terminal.png";
    @Override
    public Optional<ContextMenuItem> buildMenuItem(AnnotationContextEvent event) {
        tryContextMenuItem contextMenuItem = new ContextMenuItem("Log Selection ids", (Void t) -> {
            encodedImage = BaseEncoding.base64().encode(IOUtils.toByteArrayevent.getSelectedItems().stream().map(selectedSym -> selectedSym.getID()).forEach(logger::info);
            return t;
        });
        try (InputStream resourceAsStream = ContextMenuExtension.class.getClassLoader().getResourceAsStream(ICONPATH)) {
            contextMenuItem.setMenuIcon(new MenuIcon(resourceAsStream));
        } catch (Exception ex) {
            logger.error(ex.getMessage(), ex);
        }
        return Optional.ofNullable(contextMenuItem);
    }
    @Override
    public byte[]MenuSection getEncodedImagegetMenuSection() {
        return BaseEncoding.base64().decode(encodedImage)MenuSection.INFORMATION;
    }
}
```

mvn clean install