Part.java

package org.androiddaisyreader.model;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

public class Part implements Navigable {
    private List<Snippet> snippets = new ArrayList<Snippet>();
    private List<Part> parts = new ArrayList<Part>();
    private List<Audio> audioElements = new ArrayList<Audio>();
    private List<String> textElements = new ArrayList<String>();
    private List<String> unhandledElements = new ArrayList<String>();
    private Image image;
    private String id;
    private String timingMode;

    private Part() {
    }

    public List<Audio> getAudioElements() {
        return Collections.unmodifiableList(audioElements);
    }

    public String getId() {
        return id;
    }

    public Image getImage() {
        return image;
    }

    public List<Snippet> getSnippets() {
        return Collections.unmodifiableList(snippets);
    }

    public boolean hasAudio() {
        return !audioElements.isEmpty();
    }

    public boolean hasImage() {
        return image != null;
    }

    public boolean hasSnippets() {
        return !snippets.isEmpty();
    }

    /**
     * Builder class to construct a Part object correctly.
     * 
     * @author jharty
     */
    public static class Builder {
        private Part newInstance = new Part();

        public Builder addAudio(Audio audioClip) {
            newInstance.audioElements.add(audioClip);
            return this;
        }

        public Builder addPart(Part part) {
            newInstance.parts.add(part);
            return this;
        }

        public Builder addSnippet(Snippet snippet) {
            newInstance.snippets.add(snippet);
            return this;
        }

        public Builder addUnhandledElement(String elementDetails) {
            newInstance.unhandledElements.add(elementDetails);
            return this;
        }

        public Builder setImage(Image image) {
            newInstance.image = image;
            return this;
        }

        public Part build() {
            return newInstance;
        }

        public Builder setId(String id) {
            newInstance.id = id;
            return this;

        }

        public Builder setTimingMode(String mode) {
            newInstance.timingMode = mode;
            return this;
        }

        public Builder addTextElement(String location) {
            newInstance.textElements.add(location);
            return this;
        }
    }

    public List<Navigable> getChildren() {
        // TODO Auto-generated method stub
        return null;
    }

}