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package org.graalvm.component.installer;

import java.io.IOException;
import java.nio.file.Path;
import org.graalvm.component.installer.persist.MetadataLoader;


Recognizes file format and creates and loads metadata for it.

Author:sdedic
/**
 * Recognizes file format and creates and loads metadata for it.
 * 
 * @author sdedic
 */
public interface ComponentArchiveReader {
    
Creates a MetadataLoader for the file. The method returns null, if it does not support the file format. 
Params:
  • p – path to the file
  • fileStart – bytes at the start of the file; min 8 bytes.
  • feedback – output interface
  • verify – verify archive integrity
  • serial – identification, optional. If not given the reader is likely to compute a digest
           on the archive, or the component metadata information
Throws:
  • IOException – if the loader creation or file open fails
Returns:Metadata loader instance or null if unsupported.
/**
     * Creates a MetadataLoader for the file. The method returns {@code null}, if it does not
     * support the file format.
     * 
     * @param p path to the file
     * @param fileStart bytes at the start of the file; min 8 bytes.
     * @param feedback output interface
     * @param verify verify archive integrity
     * @param serial identification, optional. If not given the reader is likely to compute a digest
     *            on the archive, or the component metadata information
     * @return Metadata loader instance or {@code null} if unsupported.
     * @throws java.io.IOException if the loader creation or file open fails
     */
    MetadataLoader createLoader(Path p, byte[] fileStart, String serial, Feedback feedback, boolean verify) throws IOException;
}