org.apache.james.jmap.methods.AttachmentChecker Maven / Gradle / Ivy
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package org.apache.james.jmap.methods;
import java.util.List;
import javax.inject.Inject;
import org.apache.james.jmap.exceptions.AttachmentsNotFoundException;
import org.apache.james.jmap.model.Attachment;
import org.apache.james.jmap.model.BlobId;
import org.apache.james.mailbox.AttachmentManager;
import org.apache.james.mailbox.MailboxSession;
import org.apache.james.mailbox.exception.MailboxException;
import org.apache.james.mailbox.model.AttachmentId;
import com.github.fge.lambdas.Throwing;
import com.github.fge.lambdas.predicates.ThrowingPredicate;
import com.github.steveash.guavate.Guavate;
public class AttachmentChecker {
private final AttachmentManager attachmentManager;
@Inject
public AttachmentChecker(AttachmentManager attachmentManager) {
this.attachmentManager = attachmentManager;
}
public void assertAttachmentsExist(ValueWithId.CreationMessageEntry entry, MailboxSession session) throws AttachmentsNotFoundException, MailboxException {
List attachments = entry.getValue().getAttachments();
List notFounds = listAttachmentsNotFound(attachments, session);
if (!notFounds.isEmpty()) {
throw new AttachmentsNotFoundException(notFounds);
}
}
private List listAttachmentsNotFound(List attachments, MailboxSession session) throws MailboxException {
ThrowingPredicate notExists =
attachment -> !attachmentManager.exists(getAttachmentId(attachment), session);
return attachments.stream()
.filter(Throwing.predicate(notExists).sneakyThrow())
.map(Attachment::getBlobId)
.collect(Guavate.toImmutableList());
}
private AttachmentId getAttachmentId(Attachment attachment) {
return AttachmentId.from(attachment.getBlobId().getRawValue());
}
}