play.data.binding.types.FileArrayBinder Maven / Gradle / Ivy

package play.data.binding.types;

import play.data.Upload;
import play.data.binding.TypeBinder;
import play.mvc.Http.Request;

import java.io.File;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import java.util.ArrayList;
import java.util.List;

/**
 * Bind a file array form multipart/form-data request. This is nearly the same as the FileBinder, maybe some refactoring can be
 * done. This is useful when you have a multiple on your input file.
 */
public class FileArrayBinder implements TypeBinder {

    @SuppressWarnings("unchecked")
    @Override
    public File[] bind(String name, Annotation[] annotations, String value, Class actualClass, Type genericType) {
        if (value == null || value.trim().length() == 0) {
            return null;
        }
        Request req = Request.current();
        if (req != null && req.args != null) {
            List fileArray = new ArrayList();
            List uploads = (List) req.args.get("__UPLOADS");
            if (uploads != null) {
                for (Upload upload : uploads) {
                    if (upload.getFieldName().equals(value)) {
                        if (upload.getSize() != null && upload.getSize() > 0) {
                            File file = upload.asFile();
                            if (file.length() > 0) {
                                fileArray.add(file);
                            }
                        }
                    }
                }
            }
            return fileArray.toArray(new File[fileArray.size()]);
        }
        return null;
    }
}