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package org.restler.spring.mvc.files;

import org.springframework.web.multipart.MultipartFile;

import java.io.*;

public class RestlerMultipartFile implements MultipartFile {

    private final String name;
    private final File file;
    private final String contentType;

    public RestlerMultipartFile(String name, File file, String contentType) {
        this.name = name;
        this.file = file;
        this.contentType = contentType;
    }

    @Override
    public String getName() {
        return name;
    }

    @Override
    public String getOriginalFilename() {
        return file.getName();
    }

    @Override
    public String getContentType() {
        return contentType;
    }

    @Override
    public boolean isEmpty() {
        return getSize() == 0;
    }

    @Override
    public long getSize() {
        return file.length();
    }

    @Override
    public byte[] getBytes() throws IOException {
        InputStream inputStream = getInputStream();

        byte[] buffer = new byte[8192];
        int bytesRead;
        ByteArrayOutputStream output = new ByteArrayOutputStream();

        while ((bytesRead = inputStream.read(buffer)) != -1) {
            output.write(buffer, 0, bytesRead);
        }

        return output.toByteArray();
    }

    @Override
    public InputStream getInputStream() throws IOException {
        return new FileInputStream(file);
    }

    @Override
    public void transferTo(File dest) throws IOException, IllegalStateException {
        throw new UnsupportedOperationException();
    }
}