package com.icefaces.support.example;

import com.icesoft.faces.context.Resource;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.Serializable;
import java.util.Date;
import javax.faces.context.ExternalContext;
import javax.faces.context.FacesContext;

public class TableItem {

    private String fileName;
    private String mimeType;
    private Resource resource;
    public static final String RESOURCE_PATH = "/resources/";

    public TableItem(String fileName, String mimeType) {
        try {
            this.fileName = fileName;
            this.mimeType = mimeType;
            FacesContext fc = FacesContext.getCurrentInstance();
            ExternalContext ec = fc.getExternalContext();
            this.resource = new MyResource(ec, fileName);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public String getFileName() {
        return fileName;
    }

    public void setFileName(String fileName) {
        this.fileName = fileName;
    }

    public String getMimeType() {
        return mimeType;
    }

    public void setMimeType(String mimeType) {
        this.mimeType = mimeType;
    }

    public Resource getResource() {
        return resource;
    }

    public void setResource(Resource resource) {
        this.resource = resource;
    }

    public static byte[] toByteArray(InputStream input) throws IOException {
        ByteArrayOutputStream output = new ByteArrayOutputStream();
        byte[] buf = new byte[4096];
        int len = 0;
        while ((len = input.read(buf)) > -1) {
            output.write(buf, 0, len);
        }
        return output.toByteArray();
    }
}

class MyResource implements Resource, Serializable {

    private String resourceName;
    private InputStream inputStream;
    private final Date lastModified;
    private ExternalContext extContext;

    public MyResource(ExternalContext ec, String resourceName) {
        this.extContext = ec;
        this.resourceName = resourceName;
        this.lastModified = new Date();
    }

    /**
     * This intermediate step of reading in the files from the JAR, into a
     * byte array, and then serving the Resource from the ByteArrayInputStream,
     * is not strictly necessary, but serves to illustrate that the Resource
     * content need not come from an actual file, but can come from any source,
     * and also be dynamically generated. In most cases, applications need not
     * provide their own concrete implementations of Resource, but can instead
     * simply make use of com.icesoft.faces.context.ByteArrayResource,
     * com.icesoft.faces.context.FileResource, com.icesoft.faces.context.JarResource.
     */
    public InputStream open() throws IOException {
        if (inputStream == null) {
            InputStream stream = extContext.getResourceAsStream(TableItem.RESOURCE_PATH + resourceName);
            byte[] byteArray = TableItem.toByteArray(stream);
            inputStream = new ByteArrayInputStream(byteArray);
        }
        return inputStream;
    }

    public String calculateDigest() {
        return resourceName;
    }

    public Date lastModified() {
        return lastModified;
    }

    public void withOptions(Options arg0) throws IOException {
    }
}