/*
* 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.apache.nifi.processors.evtx.parser.bxml;
import com.google.common.primitives.UnsignedInteger;
import org.apache.nifi.processors.evtx.parser.BinaryReader;
import org.apache.nifi.processors.evtx.parser.BxmlNodeVisitor;
import org.apache.nifi.processors.evtx.parser.ChunkHeader;
import org.apache.nifi.processors.evtx.parser.NumberUtil;
import java.io.IOException;
/**
* Open tag in the template xml
*/
public class OpenStartElementNode extends BxmlNodeWithToken {
private final int unknown;
private final UnsignedInteger size;
private final int stringOffset;
private final String tagName;
private final int tagLength;
public OpenStartElementNode(BinaryReader binaryReader, ChunkHeader chunkHeader, BxmlNode parent) throws IOException {
super(binaryReader, chunkHeader, parent);
if ((getFlags() & 0x0b) != 0) {
throw new IOException("Invalid flag detected");
}
unknown = binaryReader.readWord();
size = binaryReader.readDWord();
stringOffset = NumberUtil.intValueMax(binaryReader.readDWord(), Integer.MAX_VALUE, "Invalid string offset.");
int tagLength = 11;
if ((getFlags() & 0x04) > 0) {
tagLength += 4;
}
String string = getChunkHeader().getString(stringOffset);
if (stringOffset > getOffset() - chunkHeader.getOffset()) {
int initialPosition = binaryReader.getPosition();
NameStringNode nameStringNode = chunkHeader.addNameStringNode(stringOffset, binaryReader);
tagLength += binaryReader.getPosition() - initialPosition;
tagName = nameStringNode.getString();
} else {
tagName = string;
}
this.tagLength = tagLength;
init();
}
public String getTagName() {
return tagName;
}
@Override
protected int getHeaderLength() {
return tagLength;
}
@Override
protected int[] getEndTokens() {
return new int[]{CLOSE_EMPTY_ELEMENT_TOKEN, CLOSE_ELEMENT_TOKEN};
}
@Override
public void accept(BxmlNodeVisitor bxmlNodeVisitor) throws IOException {
bxmlNodeVisitor.visit(this);
}
}