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- /* ====================================================================
- 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.poi.hslf.record;
-
- import java.io.IOException;
- import java.io.OutputStream;
- import java.util.Map;
- import java.util.function.Supplier;
-
- import org.apache.poi.util.GenericRecordUtil;
- import org.apache.poi.util.LittleEndian;
-
- /**
- * ExObjRefAtom (3009).
- * <p>
- * An atom record that specifies a reference to an external object.
- * </p>
- */
-
- public final class ExObjRefAtom extends RecordAtom {
- private byte[] _header;
-
- /**
- * A 4-byte unsigned integer that specifies a reference to an external object.
- * It MUST be equal to the value of the exObjId field of an ExMediaAtom record
- * or the value of the exObjId field of an ExOleObjAtom record.
- */
- private int exObjIdRef;
-
- /**
- * Create a new instance of <code>ExObjRefAtom</code>
- */
- public ExObjRefAtom() {
- _header = new byte[8];
- LittleEndian.putUShort(_header, 0, 0);
- LittleEndian.putUShort(_header, 2, (int)getRecordType());
- LittleEndian.putInt(_header, 4, 4);
- exObjIdRef = 0;
- }
-
- /**
- * Build an instance of <code>ExObjRefAtom</code> from on-disk data
- *
- * @param source the source data as a byte array.
- * @param start the start offset into the byte array.
- * @param len the length of the slice in the byte array.
- */
- protected ExObjRefAtom(byte[] source, int start, int len) {
- _header = new byte[8];
- int offset = start;
- System.arraycopy(source,start,_header,0,8);
- offset += _header.length;
- exObjIdRef = (int)LittleEndian.getUInt(source, offset);
- }
-
- /**
- * @return type of this record {@link RecordTypes#ExObjRefAtom}.
- */
- public long getRecordType() {
- return RecordTypes.ExObjRefAtom.typeID;
- }
-
- public int getExObjIdRef(){
- return exObjIdRef;
- }
-
- public void setExObjIdRef(int id){
- exObjIdRef = id;
- }
-
- /**
- * Write the contents of the record back, so it can be written
- * to disk
- */
- public void writeOut(OutputStream out) throws IOException {
- out.write(_header);
-
- byte[] recdata = new byte[4];
- LittleEndian.putUInt(recdata, 0, exObjIdRef);
-
- out.write(recdata);
- }
-
- @Override
- public Map<String, Supplier<?>> getGenericProperties() {
- return GenericRecordUtil.getGenericProperties("exObjIdRef", this::getExObjIdRef);
- }
- }
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