Galleria Dynamic

package org.primefaces.showcase.view.multimedia;

import org.primefaces.model.DefaultStreamedContent;
import org.primefaces.model.StreamedContent;
import org.primefaces.showcase.domain.Photo;
import org.primefaces.showcase.service.PhotoService;

import java.io.Serializable;
import java.util.List;

import jakarta.annotation.PostConstruct;
import jakarta.enterprise.context.RequestScoped;
import jakarta.faces.context.FacesContext;
import jakarta.faces.event.PhaseId;
import jakarta.inject.Inject;
import jakarta.inject.Named;

@Named
@RequestScoped
public class DynamicGalleriaView implements Serializable {

    private List<Photo> photos;

    @Inject
    private PhotoService service;

    @PostConstruct
    public void init() {
        photos = service.getPhotos();
    }

    public StreamedContent getPhotoAsStreamedContent() {
        FacesContext facesContext = FacesContext.getCurrentInstance();
        if (facesContext.getCurrentPhaseId() == PhaseId.RENDER_RESPONSE) {
            return DefaultStreamedContent.DUMMY; // might get invoked already during rendering, check the docs
        }

        String photoId = facesContext.getExternalContext().getRequestParameterMap().get("photoId");
        Photo photo = photos.stream()
                .filter(p -> p.getId().equals(photoId))
                .findFirst().get();

        return DefaultStreamedContent.builder()
                .name(photo.getTitle() + ".jpg")
                .contentType("image/jpg")
                .stream(() -> facesContext.getExternalContext().getResourceAsStream("/resources/" + photo.getItemImageSrc()))
                .build();
    }

    public List<Photo> getPhotos() {
        return photos;
    }

    public void setService(PhotoService service) {
        this.service = service;
    }
}

package org.primefaces.showcase.domain;

import java.io.Serializable;
import java.util.UUID;

public class Photo implements Serializable {

    private String id;
    private String itemImageSrc;
    private String thumbnailImageSrc;
    private String alt;
    private String title;

    public Photo() {
        this.id = UUID.randomUUID().toString().substring(0, 8);
    }

    public Photo(String itemImageSrc, String thumbnailImageSrc, String alt, String title) {
        this();
        this.itemImageSrc = itemImageSrc;
        this.thumbnailImageSrc = thumbnailImageSrc;
        this.alt = alt;
        this.title = title;
    }

    public String getId() {
        return id;
    }

    public void setId(String id) {
        this.id = id;
    }

    public String getItemImageSrc() {
        return itemImageSrc;
    }

    public void setItemImageSrc(String itemImageSrc) {
        this.itemImageSrc = itemImageSrc;
    }

    public String getThumbnailImageSrc() {
        return thumbnailImageSrc;
    }

    public void setThumbnailImageSrc(String thumbnailImageSrc) {
        this.thumbnailImageSrc = thumbnailImageSrc;
    }

    public String getAlt() {
        return alt;
    }

    public void setAlt(String alt) {
        this.alt = alt;
    }

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

}

package org.primefaces.showcase.service;

import org.primefaces.showcase.domain.Photo;

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

import jakarta.annotation.PostConstruct;
import jakarta.enterprise.context.ApplicationScoped;
import jakarta.inject.Named;

@Named
@ApplicationScoped
public class PhotoService {

    private List<Photo> photos;

    @PostConstruct
    public void init() {
        photos = new ArrayList<>();

        photos.add(new Photo("demo/images/galleria/galleria1.jpg", "demo/images/galleria/galleria1s.jpg",
                "Description for Image 1", "Title 1"));
        photos.add(new Photo("demo/images/galleria/galleria2.jpg", "demo/images/galleria/galleria2s.jpg",
                "Description for Image 2", "Title 2"));
        photos.add(new Photo("demo/images/galleria/galleria3.jpg", "demo/images/galleria/galleria3s.jpg",
                "Description for Image 3", "Title 3"));
        photos.add(new Photo("demo/images/galleria/galleria4.jpg", "demo/images/galleria/galleria4s.jpg",
                "Description for Image 4", "Title 4"));
        photos.add(new Photo("demo/images/galleria/galleria5.jpg", "demo/images/galleria/galleria5s.jpg",
                "Description for Image 5", "Title 5"));
        photos.add(new Photo("demo/images/galleria/galleria6.jpg", "demo/images/galleria/galleria6s.jpg",
                "Description for Image 6", "Title 6"));
        photos.add(new Photo("demo/images/galleria/galleria7.jpg", "demo/images/galleria/galleria7s.jpg",
                "Description for Image 7", "Title 7"));
        photos.add(new Photo("demo/images/galleria/galleria8.jpg", "demo/images/galleria/galleria8s.jpg",
                "Description for Image 8", "Title 8"));
        photos.add(new Photo("demo/images/galleria/galleria9.jpg", "demo/images/galleria/galleria9s.jpg",
                "Description for Image 9", "Title 9"));
        photos.add(new Photo("demo/images/galleria/galleria10.jpg", "demo/images/galleria/galleria10s.jpg",
                "Description for Image 10", "Title 10"));
        photos.add(new Photo("demo/images/galleria/galleria11.jpg", "demo/images/galleria/galleria11s.jpg",
                "Description for Image 11", "Title 11"));
        photos.add(new Photo("demo/images/galleria/galleria12.jpg", "demo/images/galleria/galleria12s.jpg",
                "Description for Image 12", "Title 12"));
        photos.add(new Photo("demo/images/galleria/galleria13.jpg", "demo/images/galleria/galleria13s.jpg",
                "Description for Image 13", "Title 13"));
        photos.add(new Photo("demo/images/galleria/galleria14.jpg", "demo/images/galleria/galleria14s.jpg",
                "Description for Image 14", "Title 14"));
        photos.add(new Photo("demo/images/galleria/galleria15.jpg", "demo/images/galleria/galleria15s.jpg",
                "Description for Image 15", "Title 15"));
    }

    public List<Photo> getPhotos() {
        return photos;
    }
}

package org.primefaces.showcase.view.multimedia;

import org.primefaces.model.ResponsiveOption;
import org.primefaces.showcase.domain.Photo;
import org.primefaces.showcase.service.PhotoService;

import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import jakarta.annotation.PostConstruct;
import jakarta.faces.context.FacesContext;
import jakarta.faces.view.ViewScoped;
import jakarta.inject.Inject;
import jakarta.inject.Named;

@Named
@ViewScoped
public class GalleriaView implements Serializable {

    private List<Photo> photos;

    private List<ResponsiveOption> responsiveOptions1;

    private List<ResponsiveOption> responsiveOptions2;

    private List<ResponsiveOption> responsiveOptions3;

    private int activeIndex = 0;

    @Inject
    private PhotoService service;

    @PostConstruct
    public void init() {
        photos = service.getPhotos();

        responsiveOptions1 = new ArrayList<>();
        responsiveOptions1.add(new ResponsiveOption("1024px", 5));
        responsiveOptions1.add(new ResponsiveOption("768px", 3));
        responsiveOptions1.add(new ResponsiveOption("560px", 1));

        responsiveOptions2 = new ArrayList<>();
        responsiveOptions2.add(new ResponsiveOption("1024px", 5));
        responsiveOptions2.add(new ResponsiveOption("960px", 4));
        responsiveOptions2.add(new ResponsiveOption("768px", 3));
        responsiveOptions2.add(new ResponsiveOption("560px", 1));

        responsiveOptions3 = new ArrayList<>();
        responsiveOptions3.add(new ResponsiveOption("1500px", 5));
        responsiveOptions3.add(new ResponsiveOption("1024px", 3));
        responsiveOptions3.add(new ResponsiveOption("768px", 2));
        responsiveOptions3.add(new ResponsiveOption("560px", 1));
    }

    public void changeActiveIndex() {
        Map<String, String> params = FacesContext.getCurrentInstance().getExternalContext().getRequestParameterMap();
        this.activeIndex = Integer.valueOf(params.get("index"));
    }

    public List<Photo> getPhotos() {
        return photos;
    }

    public List<ResponsiveOption> getResponsiveOptions1() {
        return responsiveOptions1;
    }

    public List<ResponsiveOption> getResponsiveOptions2() {
        return responsiveOptions2;
    }

    public List<ResponsiveOption> getResponsiveOptions3() {
        return responsiveOptions3;
    }

    public int getActiveIndex() {
        return activeIndex;
    }

    public void setActiveIndex(int activeIndex) {
        this.activeIndex = activeIndex;
    }

    public void setService(PhotoService service) {
        this.service = service;
    }

}