package org.semanticweb.owlapi.io;
import static org.semanticweb.owlapi.util.OWLAPIPreconditions.checkNotNull;
import java.io.InputStream;
import java.util.concurrent.atomic.AtomicLong;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import org.apache.commons.io.ByteOrderMark;
import org.apache.commons.io.input.BOMInputStream;
import org.semanticweb.owlapi.model.IRI;
import org.semanticweb.owlapi.model.OWLDocumentFormat;
/**
* Base class for OWLOntologyDocumentSource.
*
* @author ignazio
* @since 4.0.0
*/
public abstract class OWLOntologyDocumentSourceBase implements
OWLOntologyDocumentSource {
private static final AtomicLong COUNTER = new AtomicLong();
/**
* @param prefix
* prefix for result
* @return a fresh IRI
*/
@Nonnull
public static IRI getNextDocumentIRI(String prefix) {
return IRI.create(prefix + COUNTER.incrementAndGet());
}
/**
* Wrap an input stream to strip BOMs.
*
* @param delegate
* delegate to wrap
* @return wrapped input stream
*/
@Nonnull
public static InputStream wrap(@Nonnull InputStream delegate) {
checkNotNull(delegate, "delegate cannot be null");
return new BOMInputStream(delegate, ByteOrderMark.UTF_8,
ByteOrderMark.UTF_16BE, ByteOrderMark.UTF_16LE,
ByteOrderMark.UTF_32BE, ByteOrderMark.UTF_32LE);
}
private final OWLDocumentFormat format;
private final String mimeType;
/**
* Constructs an ontology input source using the specified file.
*
* @param format
* ontology format. If null, it is considered unspecified
* @param mime
* mime type. If null or empty, it is considered unspecified.
*/
public OWLOntologyDocumentSourceBase(@Nullable OWLDocumentFormat format,
@Nullable String mime) {
this.format = format;
mimeType = mime;
}
@Override
public OWLDocumentFormat getFormat() {
return format;
}
@Override
public boolean isFormatKnown() {
return format != null;
}
@Override
public String getMIMEType() {
return mimeType;
}
@Override
public boolean isMIMETypeKnown() {
return mimeType != null && !mimeType.isEmpty();
}
}