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From David Fisher <dfis...@jmlafferty.com>
Subject Re: svn commit: r497107 - in /jakarta/poi/trunk/src/scratchpad: src/org/apache/poi/hslf/record/ testcases/org/apache/poi/hslf/record/
Date Wed, 17 Jan 2007 19:24:23 GMT
Nick,

Thanks for this. I was going to ask Yegor to look into it.

Regards,
Dave

On Jan 17, 2007, at 12:09 PM, nick@apache.org wrote:

> Author: nick
> Date: Wed Jan 17 10:09:24 2007
> New Revision: 497107
>
> URL: http://svn.apache.org/viewvc?view=rev&rev=497107
> Log:
> Add ExObjList support
>
> Added:
>     jakarta/poi/trunk/src/scratchpad/src/org/apache/poi/hslf/record/ 
> ExObjList.java
>     jakarta/poi/trunk/src/scratchpad/src/org/apache/poi/hslf/record/ 
> ExObjListAtom.java
>     jakarta/poi/trunk/src/scratchpad/testcases/org/apache/poi/hslf/ 
> record/TestExObjList.java
>     jakarta/poi/trunk/src/scratchpad/testcases/org/apache/poi/hslf/ 
> record/TestExObjListAtom.java
> Modified:
>     jakarta/poi/trunk/src/scratchpad/src/org/apache/poi/hslf/record/ 
> Document.java
>     jakarta/poi/trunk/src/scratchpad/src/org/apache/poi/hslf/record/ 
> RecordTypes.java
>     jakarta/poi/trunk/src/scratchpad/testcases/org/apache/poi/hslf/ 
> record/TestExHyperlink.java
>     jakarta/poi/trunk/src/scratchpad/testcases/org/apache/poi/hslf/ 
> record/TestExHyperlinkAtom.java
>
> Modified: jakarta/poi/trunk/src/scratchpad/src/org/apache/poi/hslf/ 
> record/Document.java
> URL: http://svn.apache.org/viewvc/jakarta/poi/trunk/src/scratchpad/ 
> src/org/apache/poi/hslf/record/Document.java? 
> view=diff&rev=497107&r1=497106&r2=497107
> ====================================================================== 
> ========
> --- jakarta/poi/trunk/src/scratchpad/src/org/apache/poi/hslf/record/ 
> Document.java (original)
> +++ jakarta/poi/trunk/src/scratchpad/src/org/apache/poi/hslf/record/ 
> Document.java Wed Jan 17 10:09:24 2007
> @@ -39,6 +39,7 @@
>  	private Environment environment;
>  	private PPDrawingGroup ppDrawing;
>  	private SlideListWithText[] slwts;
> +	private ExObjList exObjList; // Can be null
>
>  	/**
>  	 * Returns the DocumentAtom of this Document
> @@ -54,6 +55,12 @@
>  	 *  that contains information on pictures in the slides.
>  	 */
>  	public PPDrawingGroup getPPDrawingGroup() { return ppDrawing; }
> +	/**
> +	 * Returns the ExObjList, which holds the references to
> +	 *  external objects used in the slides. This may be null, if
> +	 *  there are no external references.
> +	 */
> +	public ExObjList getExObjList() { return exObjList; }
>  	
>  	/**
>  	 * Returns all the SlideListWithTexts that are defined for
> @@ -115,6 +122,9 @@
>  			}
>  			if(_children[i] instanceof PPDrawingGroup) {
>  				ppDrawing = (PPDrawingGroup)_children[i];
> +			}
> +			if(_children[i] instanceof ExObjList) {
> +				exObjList = (ExObjList)_children[i];
>  			}
>  		}
>  		
>
> Added: jakarta/poi/trunk/src/scratchpad/src/org/apache/poi/hslf/ 
> record/ExObjList.java
> URL: http://svn.apache.org/viewvc/jakarta/poi/trunk/src/scratchpad/ 
> src/org/apache/poi/hslf/record/ExObjList.java?view=auto&rev=497107
> ====================================================================== 
> ========
> --- jakarta/poi/trunk/src/scratchpad/src/org/apache/poi/hslf/record/ 
> ExObjList.java (added)
> +++ jakarta/poi/trunk/src/scratchpad/src/org/apache/poi/hslf/record/ 
> ExObjList.java Wed Jan 17 10:09:24 2007
> @@ -0,0 +1,112 @@
> +/*
> +* 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 links = new ArrayList();
> +		for(int i=0; i<_children.length; i++) {
> +			if(_children[i] instanceof ExHyperlink) {
> +				links.add(_children[i]);
> +			}
> +		}
> +
> +		return (ExHyperlink[])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);
> +	}
> +
> +}
>
> Added: jakarta/poi/trunk/src/scratchpad/src/org/apache/poi/hslf/ 
> record/ExObjListAtom.java
> URL: http://svn.apache.org/viewvc/jakarta/poi/trunk/src/scratchpad/ 
> src/org/apache/poi/hslf/record/ExObjListAtom.java?view=auto&rev=497107
> ====================================================================== 
> ========
> --- jakarta/poi/trunk/src/scratchpad/src/org/apache/poi/hslf/record/ 
> ExObjListAtom.java (added)
> +++ jakarta/poi/trunk/src/scratchpad/src/org/apache/poi/hslf/record/ 
> ExObjListAtom.java Wed Jan 17 10:09:24 2007
> @@ -0,0 +1,114 @@
> +/*  
> ====================================================================
> +   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 org.apache.poi.util.LittleEndian;
> +
> +/**
> + * Tne atom that holds the seed info used by a ExObjList
> + *
> + * @author Nick Burch
> + */
> +
> +public class ExObjListAtom extends RecordAtom
> +{
> +    /**
> +     * Record header.
> +     */
> +    private byte[] _header;
> +
> +    /**
> +     * Record data.
> +     */
> +    private byte[] _data;
> +
> +    /**
> +     * Constructs a brand new link related atom record.
> +     */
> +    protected ExObjListAtom() {
> +        _header = new byte[8];
> +        _data = new byte[4];
> +
> +        LittleEndian.putShort(_header, 2, (short)getRecordType());
> +        LittleEndian.putInt(_header, 4, _data.length);
> +
> +        // It is fine for the other values to be zero
> +    }
> +
> +    /**
> +     * Constructs the link related atom record from its
> +     *  source 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 ExObjListAtom(byte[] source, int start, int len) {
> +        // Get the header.
> +        _header = new byte[8];
> +        System.arraycopy(source,start,_header,0,8);
> +
> +        // Get the record data.
> +        _data = new byte[len-8];
> +        System.arraycopy(source,start+8,_data,0,len-8);
> +
> +        // Must be at least 4 bytes long
> +        if(_data.length < 4) {
> +        	throw new IllegalArgumentException("The length of the  
> data for a ExObjListAtom must be at least 4 bytes, but was only " +  
> _data.length);
> +        }
> +    }
> +
> +    /**
> +     * Gets the object ID seed, which will be used as the unique
> +     *  OLE identifier for the next OLE object added
> +     * @return the object ID seed
> +     */
> +    public long getObjectIDSeed() {
> +        return LittleEndian.getUInt(_data,0);
> +    }
> +
> +    /**
> +     * Sets the object ID seed
> +     * @param seed the new ID seed
> +     */
> +    public void setObjectIDSeed(int seed) {
> +        LittleEndian.putInt(_data,0,seed);
> +    }
> +
> +    /**
> +     * Gets the record type.
> +     * @return the record type.
> +     */
> +    public long getRecordType() { return  
> RecordTypes.ExObjListAtom.typeID; }
> +
> +    /**
> +     * Write the contents of the record back, so it can be written
> +     * to disk
> +     *
> +     * @param out the output stream to write to.
> +     * @throws IOException if an error occurs.
> +     */
> +    public void writeOut(OutputStream out) throws IOException {
> +        out.write(_header);
> +        out.write(_data);
> +    }
> +}
>
> Modified: jakarta/poi/trunk/src/scratchpad/src/org/apache/poi/hslf/ 
> record/RecordTypes.java
> URL: http://svn.apache.org/viewvc/jakarta/poi/trunk/src/scratchpad/ 
> src/org/apache/poi/hslf/record/RecordTypes.java? 
> view=diff&rev=497107&r1=497106&r2=497107
> ====================================================================== 
> ========
> --- jakarta/poi/trunk/src/scratchpad/src/org/apache/poi/hslf/record/ 
> RecordTypes.java (original)
> +++ jakarta/poi/trunk/src/scratchpad/src/org/apache/poi/hslf/record/ 
> RecordTypes.java Wed Jan 17 10:09:24 2007
> @@ -59,8 +59,8 @@
>      public static final Type DocRoutingSlip = new Type(1030,null);
>      public static final Type OutlineViewInfo = new Type(1031,null);
>      public static final Type SorterViewInfo = new Type(1032,null);
> -    public static final Type ExObjList = new Type 
> (1033,DummyRecordWithChildren.class);
> -    public static final Type ExObjListAtom = new Type(1034,null);
> +    public static final Type ExObjList = new Type 
> (1033,ExObjList.class);
> +    public static final Type ExObjListAtom = new Type 
> (1034,ExObjListAtom.class);
>      public static final Type PPDrawingGroup = new Type 
> (1035,PPDrawingGroup.class);
>      public static final Type PPDrawing = new Type 
> (1036,PPDrawing.class);
>      public static final Type NamedShows = new Type(1040,null);
>
> Modified: jakarta/poi/trunk/src/scratchpad/testcases/org/apache/poi/ 
> hslf/record/TestExHyperlink.java
> URL: http://svn.apache.org/viewvc/jakarta/poi/trunk/src/scratchpad/ 
> testcases/org/apache/poi/hslf/record/TestExHyperlink.java? 
> view=diff&rev=497107&r1=497106&r2=497107
> ====================================================================== 
> ========
> --- jakarta/poi/trunk/src/scratchpad/testcases/org/apache/poi/hslf/ 
> record/TestExHyperlink.java (original)
> +++ jakarta/poi/trunk/src/scratchpad/testcases/org/apache/poi/hslf/ 
> record/TestExHyperlink.java Wed Jan 17 10:09:24 2007
> @@ -23,6 +23,7 @@
>
>  import junit.framework.TestCase;
>  import java.io.ByteArrayOutputStream;
> +import java.io.File;
>  import java.text.SimpleDateFormat;
>  import java.util.ArrayList;
>  import java.util.Date;
> @@ -100,16 +101,16 @@
>  	
>  	public void testRealFile() throws Exception {
>  		String dirname = System.getProperty("HSLF.testdata.path");
> -		HSLFSlideShow hss = new HSLFSlideShow(dirname + "WithLinks.ppt");
> +		HSLFSlideShow hss = new HSLFSlideShow(dirname + File.separator +  
> "WithLinks.ppt");
>  		SlideShow ss = new SlideShow(hss);
>  		
>  		// Get the document
>  		Document doc = ss.getDocumentRecord();
>  		// Get the ExObjList
> -		RecordContainer exObjList = null;
> +		ExObjList exObjList = null;
>  		for(int i=0; i<doc._children.length; i++) {
> -			if(doc._children[i].getRecordType() ==  
> RecordTypes.ExObjList.typeID) {
> -				exObjList = (RecordContainer)doc._children[i];
> +			if(doc._children[i] instanceof ExObjList) {
> +				exObjList = (ExObjList)doc._children[i];
>  			}
>  		}
>  		assertNotNull(exObjList);
> @@ -126,6 +127,10 @@
>  		assertEquals(4, linksA.size());
>  		ExHyperlink[] links = new ExHyperlink[linksA.size()];
>  		linksA.toArray(links);
> +		
> +		assertEquals(4, exObjList.getExHyperlinks().length);
> +		
> +		// Check the other way
>  		
>  		// Check they have what we expect in them
>  		assertEquals(1, links[0].getExHyperlinkAtom().getNumber());
>
> Modified: jakarta/poi/trunk/src/scratchpad/testcases/org/apache/poi/ 
> hslf/record/TestExHyperlinkAtom.java
> URL: http://svn.apache.org/viewvc/jakarta/poi/trunk/src/scratchpad/ 
> testcases/org/apache/poi/hslf/record/TestExHyperlinkAtom.java? 
> view=diff&rev=497107&r1=497106&r2=497107
> ====================================================================== 
> ========
> --- jakarta/poi/trunk/src/scratchpad/testcases/org/apache/poi/hslf/ 
> record/TestExHyperlinkAtom.java (original)
> +++ jakarta/poi/trunk/src/scratchpad/testcases/org/apache/poi/hslf/ 
> record/TestExHyperlinkAtom.java Wed Jan 17 10:09:24 2007
> @@ -27,7 +27,7 @@
>  import java.util.Date;
>
>  /**
> - * Tests that InteractiveInfoAtom works properly.
> + * Tests that ExHyperlinkAtom works properly.
>   *
>   * @author Nick Burch (nick at torchbox dot com)
>   */
>
> Added: jakarta/poi/trunk/src/scratchpad/testcases/org/apache/poi/ 
> hslf/record/TestExObjList.java
> URL: http://svn.apache.org/viewvc/jakarta/poi/trunk/src/scratchpad/ 
> testcases/org/apache/poi/hslf/record/TestExObjList.java? 
> view=auto&rev=497107
> ====================================================================== 
> ========
> --- jakarta/poi/trunk/src/scratchpad/testcases/org/apache/poi/hslf/ 
> record/TestExObjList.java (added)
> +++ jakarta/poi/trunk/src/scratchpad/testcases/org/apache/poi/hslf/ 
> record/TestExObjList.java Wed Jan 17 10:09:24 2007
> @@ -0,0 +1,76 @@
> +
> +/*  
> ====================================================================
> +   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 junit.framework.TestCase;
> +import java.io.ByteArrayOutputStream;
> +import java.io.File;
> +import java.text.SimpleDateFormat;
> +import java.util.ArrayList;
> +import java.util.Date;
> +
> +import org.apache.poi.hslf.HSLFSlideShow;
> +import org.apache.poi.hslf.usermodel.SlideShow;
> +
> +/**
> + * Tests that ExObjList works properly.
> + *
> + * @author Nick Burch (nick at torchbox dot com)
> + */
> +public class TestExObjList extends TestCase {
> +	public void testRealFile() throws Exception {
> +		String dirname = System.getProperty("HSLF.testdata.path");
> +		HSLFSlideShow hss = new HSLFSlideShow(dirname + File.separator +  
> "WithLinks.ppt");
> +		SlideShow ss = new SlideShow(hss);
> +		
> +		// Get the document
> +		Document doc = ss.getDocumentRecord();
> +		// Get the ExObjList
> +		ExObjList exObjList = doc.getExObjList();
> +		assertNotNull(exObjList);
> +		assertEquals(1033l, exObjList.getRecordType());
> +		
> +		// Check the atom
> +		assertNotNull(exObjList.getExObjListAtom());
> +		assertEquals(4, exObjList.getExObjListAtom().getObjectIDSeed());
> +		
> +		// Check the Hyperlinks
> +		assertEquals(4, exObjList.getExHyperlinks().length);
> +		
> +		// Check the contents
> +		ExHyperlink[] links = exObjList.getExHyperlinks();
> +		
> +		// Check they have what we expect in them
> +		assertEquals(1, links[0].getExHyperlinkAtom().getNumber());
> +		assertEquals("http://jakarta.apache.org/poi/", links 
> [0].getLinkURL());
> +		
> +		assertEquals(2, links[1].getExHyperlinkAtom().getNumber());
> +		assertEquals("http://slashdot.org/", links[1].getLinkURL());
> +		
> +		assertEquals(3, links[2].getExHyperlinkAtom().getNumber());
> +		assertEquals("http://jakarta.apache.org/poi/hssf/", links 
> [2].getLinkURL());
> +		
> +		assertEquals(4, links[3].getExHyperlinkAtom().getNumber());
> +		assertEquals("http://jakarta.apache.org/hslf/", links 
> [3].getLinkURL());
> +		
> +	}
> +}
>
> Added: jakarta/poi/trunk/src/scratchpad/testcases/org/apache/poi/ 
> hslf/record/TestExObjListAtom.java
> URL: http://svn.apache.org/viewvc/jakarta/poi/trunk/src/scratchpad/ 
> testcases/org/apache/poi/hslf/record/TestExObjListAtom.java? 
> view=auto&rev=497107
> ====================================================================== 
> ========
> --- jakarta/poi/trunk/src/scratchpad/testcases/org/apache/poi/hslf/ 
> record/TestExObjListAtom.java (added)
> +++ jakarta/poi/trunk/src/scratchpad/testcases/org/apache/poi/hslf/ 
> record/TestExObjListAtom.java Wed Jan 17 10:09:24 2007
> @@ -0,0 +1,106 @@
> +
> +/*  
> ====================================================================
> +   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 junit.framework.TestCase;
> +import java.io.ByteArrayOutputStream;
> +import java.text.SimpleDateFormat;
> +import java.util.Date;
> +
> +/**
> + * Tests that ExObjListAtom works properly.
> + *
> + * @author Nick Burch (nick at torchbox dot com)
> + */
> +public class TestExObjListAtom extends TestCase {
> +	// From a real file
> +	private byte[] data_a = new byte[] {
> +		00, 00, 0x0A, 0x04, 04, 00, 00, 00,
> +		01, 00, 00, 00
> +	};
> +	private byte[] data_b = new byte[] {
> +		00, 00, 0x0A, 0x04, 04, 00, 00, 00,
> +		04, 00, 00, 00
> +	};
> +	
> +    public void testRecordType() throws Exception {
> +    	ExObjListAtom eoa = new ExObjListAtom(data_a, 0, data_a.length);
> +		assertEquals(1034l, eoa.getRecordType());
> +	}
> +
> +    public void testGetSeed() throws Exception {
> +    	ExObjListAtom eoa = new ExObjListAtom(data_a, 0, data_a.length);
> +    	ExObjListAtom eob = new ExObjListAtom(data_b, 0, data_b.length);
> +		
> +		assertEquals(1, eoa.getObjectIDSeed());
> +		assertEquals(4, eob.getObjectIDSeed());
> +    }
> +
> +	public void testWrite() throws Exception {
> +    	ExObjListAtom eoa = new ExObjListAtom(data_a, 0, data_a.length);
> +		ByteArrayOutputStream baos = new ByteArrayOutputStream();
> +		eoa.writeOut(baos);
> +		byte[] b = baos.toByteArray();
> +
> +		assertEquals(data_a.length, b.length);
> +		for(int i=0; i<data_a.length; i++) {
> +			assertEquals(data_a[i],b[i]);
> +		}
> +	}
> +
> +	// Create A from scratch
> +    public void testCreate() throws Exception {
> +    	ExObjListAtom eoa = new ExObjListAtom();
> +    	
> +    	// Set seed
> +    	eoa.setObjectIDSeed(1);
> +    	
> +		// Check it's now the same as a
> +		ByteArrayOutputStream baos = new ByteArrayOutputStream();
> +		eoa.writeOut(baos);
> +		byte[] b = baos.toByteArray();
> +		
> +		assertEquals(data_a.length, b.length);
> +		for(int i=0; i<data_a.length; i++) {
> +			assertEquals(data_a[i],b[i]);
> +		}
> +    }
> +
> +	// Try to turn a into b
> +	public void testChange() throws Exception {
> +    	ExObjListAtom eoa = new ExObjListAtom(data_a, 0, data_a.length);
> +
> +		// Change the number
> +		eoa.setObjectIDSeed(4);
> +		
> +		// Check bytes are now the same
> +		ByteArrayOutputStream baos = new ByteArrayOutputStream();
> +		eoa.writeOut(baos);
> +		byte[] b = baos.toByteArray();
> +		
> +		// Should now be the same
> +		assertEquals(data_b.length, b.length);
> +		for(int i=0; i<data_b.length; i++) {
> +			assertEquals(data_b[i],b[i]);
> +		}
> +	}
> +}
>
>
>
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>
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