| /* |
| * 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.ArrayList; |
| |
| import org.apache.poi.util.LittleEndian; |
| |
| /** |
| * This class holds the links to exernal objects referenced |
| * from the document. |
| * @author Nick Burch |
| */ |
| public class ExObjList extends RecordContainer { |
| private byte[] _header; |
| private static long _type = 1033; |
| |
| // Links to our more interesting children |
| private ExObjListAtom exObjListAtom; |
| |
| /** |
| * Returns the ExObjListAtom of this list |
| */ |
| public ExObjListAtom getExObjListAtom() { return exObjListAtom; } |
| |
| /** |
| * Returns all the ExHyperlinks |
| */ |
| public ExHyperlink[] getExHyperlinks() { |
| ArrayList<ExHyperlink> links = new ArrayList<ExHyperlink>(); |
| for(int i=0; i<_children.length; i++) { |
| if(_children[i] instanceof ExHyperlink) { |
| links.add( (ExHyperlink)_children[i] ); |
| } |
| } |
| |
| return links.toArray(new ExHyperlink[links.size()]); |
| } |
| |
| /** |
| * Set things up, and find our more interesting children |
| */ |
| protected ExObjList(byte[] source, int start, int len) { |
| // Grab the header |
| _header = new byte[8]; |
| System.arraycopy(source,start,_header,0,8); |
| |
| // Find our children |
| _children = Record.findChildRecords(source,start+8,len-8); |
| findInterestingChildren(); |
| } |
| |
| /** |
| * Go through our child records, picking out the ones that are |
| * interesting, and saving those for use by the easy helper |
| * methods. |
| */ |
| private void findInterestingChildren() { |
| // First child should be the atom |
| if(_children[0] instanceof ExObjListAtom) { |
| exObjListAtom = (ExObjListAtom)_children[0]; |
| } else { |
| throw new IllegalStateException("First child record wasn't a ExObjListAtom, was of type " + _children[0].getRecordType()); |
| } |
| } |
| |
| /** |
| * Create a new ExObjList, with blank fields |
| */ |
| public ExObjList() { |
| _header = new byte[8]; |
| _children = new Record[1]; |
| |
| // Setup our header block |
| _header[0] = 0x0f; // We are a container record |
| LittleEndian.putShort(_header, 2, (short)_type); |
| |
| // Setup our child records |
| _children[0] = new ExObjListAtom(); |
| findInterestingChildren(); |
| } |
| |
| /** |
| * We are of type 1033 |
| */ |
| public long getRecordType() { return _type; } |
| |
| /** |
| * Write the contents of the record back, so it can be written |
| * to disk |
| */ |
| public void writeOut(OutputStream out) throws IOException { |
| writeOut(_header[0],_header[1],_type,_children,out); |
| } |
| |
| /** |
| * Lookup a hyperlink by its unique id |
| * |
| * @param id hyperlink id |
| * @return found <code>ExHyperlink</code> or <code>null</code> |
| */ |
| public ExHyperlink get(int id){ |
| for(int i=0; i<_children.length; i++) { |
| if(_children[i] instanceof ExHyperlink) { |
| ExHyperlink rec = (ExHyperlink)_children[i]; |
| if (rec.getExHyperlinkAtom().getNumber() == id){ |
| return rec; |
| } |
| } |
| } |
| return null; |
| } |
| } |