/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.waveprotocol.box.expimp;
import com.google.protobuf.InvalidProtocolBufferException;
import org.waveprotocol.wave.federation.Proto.ProtocolDocumentOperation.Component;
import org.waveprotocol.wave.federation.Proto.ProtocolDocumentOperation.Component.ElementStart;
import org.waveprotocol.wave.federation.Proto.ProtocolWaveletDelta;
import org.waveprotocol.wave.federation.Proto.ProtocolWaveletOperation;
import org.waveprotocol.wave.federation.Proto.ProtocolWaveletOperation.MutateDocument;
import org.waveprotocol.wave.media.model.AttachmentId;
import org.waveprotocol.wave.model.id.InvalidIdException;
import org.waveprotocol.wave.model.image.ImageConstants;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
/**
* Raw deltas parser.
*
* @author akaplanov@gmail.com (Andrew Kaplanov)
*/
public class DeltaParser {
private DeltaParser() {
}
public static List<ProtocolWaveletDelta> parseDeltas(List<byte[]> rawDeltas)
throws InvalidProtocolBufferException {
List<ProtocolWaveletDelta> deltas = new ArrayList<ProtocolWaveletDelta>();
for (byte[] delta : rawDeltas) {
deltas.add(ProtocolWaveletDelta.parseFrom(delta));
}
return deltas;
}
/**
* Extract attachment ids from operations.
*/
public static Set<AttachmentId> getAttachemntIds(ProtocolWaveletDelta delta) {
Set<AttachmentId> ids = new HashSet<AttachmentId>();
for (int i=0; i < delta.getOperationCount(); i++) {
ProtocolWaveletOperation op = delta.getOperation(i);
if (op.hasMutateDocument()) {
MutateDocument doc = op.getMutateDocument();
for (int c = 0; c < doc.getDocumentOperation().getComponentCount(); c++) {
Component comp = doc.getDocumentOperation().getComponent(c);
ElementStart start = comp.getElementStart();
if (ImageConstants.TAGNAME.equals(start.getType())) {
for (int a=0; a < start.getAttributeCount(); a++) {
Component.KeyValuePair attr = start.getAttribute(a);
if (ImageConstants.ATTACHMENT_ATTRIBUTE.equals(attr.getKey())) {
try {
ids.add(AttachmentId.deserialise(attr.getValue()));
} catch (InvalidIdException ex) {
Console.error("Invalid attachment Id " + attr.getValue(), ex);
}
}
}
}
}
}
}
return ids;
}
}