teststreamcomplex.java

java 读写word excel ppt

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package org.apache.poi.hdgf.streams;

import java.io.FileInputStream;

import org.apache.poi.hdgf.chunks.Chunk;
import org.apache.poi.hdgf.chunks.ChunkFactory;
import org.apache.poi.hdgf.pointers.Pointer;
import org.apache.poi.hdgf.pointers.PointerFactory;
import org.apache.poi.poifs.filesystem.DocumentEntry;
import org.apache.poi.poifs.filesystem.POIFSFileSystem;

public class TestStreamComplex extends StreamTest {
	private byte[] contents;
	private int trailerPointerAt = 0x24;
	private int trailerDataAt = 0x8a94;
	private ChunkFactory chunkFactory;
	private PointerFactory ptrFactory;

	protected void setUp() throws Exception {
		String dirname = System.getProperty("HDGF.testdata.path");
		String filename = dirname + "/Test_Visio-Some_Random_Text.vsd";
		ptrFactory = new PointerFactory(11);
		chunkFactory = new ChunkFactory(11);

		FileInputStream fin = new FileInputStream(filename);
		POIFSFileSystem filesystem = new POIFSFileSystem(fin);
		
		DocumentEntry docProps =
			(DocumentEntry)filesystem.getRoot().getEntry("VisioDocument");

		// Grab the document stream
		contents = new byte[docProps.getSize()];
		filesystem.createDocumentInputStream("VisioDocument").read(contents);
	}

	/**
	 * Test creating the trailer, but not looking for children
	 */
	public void testTrailer() {
		// Find the trailer
		Pointer trailerPtr = ptrFactory.createPointer(contents, trailerPointerAt);
		
		assertEquals(20, trailerPtr.getType());
		assertEquals(trailerDataAt, trailerPtr.getOffset());
		
		Stream stream = Stream.createStream(trailerPtr, contents, chunkFactory, ptrFactory);
		assertTrue(stream instanceof TrailerStream);
		TrailerStream ts = (TrailerStream)stream;
		
		assertNotNull(ts.getChildPointers());
		assertNull(ts.getPointedToStreams());
		
		assertEquals(20, ts.getChildPointers().length);
		assertEquals(0x16, ts.getChildPointers()[0].getType());
		assertEquals(0x17, ts.getChildPointers()[1].getType());
		assertEquals(0x17, ts.getChildPointers()[2].getType());
		assertEquals(0xff, ts.getChildPointers()[3].getType());
	}
	
	public void testChunks() {
		Pointer trailerPtr = ptrFactory.createPointer(contents, trailerPointerAt);
		TrailerStream ts = (TrailerStream)
			Stream.createStream(trailerPtr, contents, chunkFactory, ptrFactory);
		
		// Should be 7th one
		Pointer chunkPtr = ts.getChildPointers()[5];
		assertFalse(chunkPtr.destinationHasStrings());
		assertTrue(chunkPtr.destinationHasChunks());
		assertFalse(chunkPtr.destinationHasPointers());
		
		Stream stream = Stream.createStream(chunkPtr, contents, chunkFactory, ptrFactory);
		assertNotNull(stream);
		assertTrue(stream instanceof ChunkStream);
		
		// Now find the chunks within it
		ChunkStream cs = (ChunkStream)stream;
		cs.findChunks();
	}
	
	public void testStrings() {
		Pointer trailerPtr = ptrFactory.createPointer(contents, trailerPointerAt);
		TrailerStream ts = (TrailerStream)
			Stream.createStream(trailerPtr, contents, chunkFactory, ptrFactory);
		
		// Should be the 1st one
		Pointer stringPtr = ts.getChildPointers()[0];
		assertTrue(stringPtr.destinationHasStrings());
		assertFalse(stringPtr.destinationHasChunks());
		assertFalse(stringPtr.destinationHasPointers());
		
		Stream stream = Stream.createStream(stringPtr, contents, chunkFactory, ptrFactory);
		assertNotNull(stream);
		assertTrue(stream instanceof StringsStream);
	}
	
	public void testPointerToStrings() {
		// The stream at 0x347f has strings
		// The stream at 0x4312 has a pointer to 0x347f
		// The stream at 0x44d3 has a pointer to 0x4312
		//  (it's the 2nd one of 3, and the block is compressed)
		
		TestPointer ptr44d3 = new TestPointer(true, 0x44d3, 0x51, 0x4e, (short)0x56);
		ptr44d3.hasPointers = true;
		PointerContainingStream s44d3 = (PointerContainingStream)
			Stream.createStream(ptr44d3, contents, chunkFactory, ptrFactory);
		
		// Type: 0d  Addr: 014ff644  Offset: 4312  Len: 48  Format: 54  From: 44d3
		Pointer ptr4312 = s44d3.getChildPointers()[1];
		assertEquals(0x0d, ptr4312.getType());
		assertEquals(0x4312, ptr4312.getOffset());
		assertEquals(0x48, ptr4312.getLength());
		assertEquals(0x54, ptr4312.getFormat());
		assertTrue(ptr4312.destinationHasPointers());
		assertFalse(ptr4312.destinationHasStrings());
		
		PointerContainingStream s4312 = (PointerContainingStream)
			Stream.createStream(ptr4312, contents, chunkFactory, ptrFactory);
		
		// Check it has 0x347f
		// Type: 1f  Addr: 01540004  Offset: 347f  Len: 8e8  Format: 46  From: 4312
		assertEquals(2, s4312.getChildPointers().length);
		Pointer ptr347f = s4312.getChildPointers()[0];
		assertEquals(0x1f, ptr347f.getType());
		assertEquals(0x347f, ptr347f.getOffset());
		assertEquals(0x8e8, ptr347f.getLength());
		assertEquals(0x46, ptr347f.getFormat());
		assertFalse(ptr347f.destinationHasPointers());
		assertTrue(ptr347f.destinationHasStrings());
		
		// Find the children of 0x4312
		assertNull(s4312.getPointedToStreams());
		s4312.findChildren(contents);
		// Should have two, both strings
		assertNotNull(s4312.getPointedToStreams());
		assertEquals(2, s4312.getPointedToStreams().length);
		assertTrue(s4312.getPointedToStreams()[0] instanceof StringsStream);
		assertTrue(s4312.getPointedToStreams()[1] instanceof StringsStream);
	}
	
	public void testTrailerContents() {
		Pointer trailerPtr = ptrFactory.createPointer(contents, trailerPointerAt);
		TrailerStream ts = (TrailerStream)
			Stream.createStream(trailerPtr, contents, chunkFactory, ptrFactory);
		
		assertNotNull(ts.getChildPointers());
		assertNull(ts.getPointedToStreams());
		assertEquals(20, ts.getChildPointers().length);
		
		ts.findChildren(contents);
		
		assertNotNull(ts.getChildPointers());
		assertNotNull(ts.getPointedToStreams());
		assertEquals(20, ts.getChildPointers().length);
		assertEquals(20, ts.getPointedToStreams().length);
		
		// Step down:
		// 8 -> 4 -> 5 -> 1 -> 0 == String
		assertNotNull(ts.getPointedToStreams()[8]);
		assertTrue(ts.getPointedToStreams()[8] instanceof PointerContainingStream);
		
		PointerContainingStream s8 = 
			(PointerContainingStream)ts.getPointedToStreams()[8];
		assertNotNull(s8.getPointedToStreams());
		
		assertNotNull(s8.getPointedToStreams()[4]);
		assertTrue(s8.getPointedToStreams()[4] instanceof PointerContainingStream);
		
		PointerContainingStream s84 = 
			(PointerContainingStream)s8.getPointedToStreams()[4];
		assertNotNull(s84.getPointedToStreams());
		
		assertNotNull(s84.getPointedToStreams()[5]);
		assertTrue(s84.getPointedToStreams()[5] instanceof PointerContainingStream);
		
		PointerContainingStream s845 = 
			(PointerContainingStream)s84.getPointedToStreams()[5];
		assertNotNull(s845.getPointedToStreams());
		
		assertNotNull(s845.getPointedToStreams()[1]);
		assertTrue(s845.getPointedToStreams()[1] instanceof PointerContainingStream);
		
		PointerContainingStream s8451 = 
			(PointerContainingStream)s845.getPointedToStreams()[1];
		assertNotNull(s8451.getPointedToStreams());
		
		assertNotNull(s8451.getPointedToStreams()[0]);
		assertTrue(s8451.getPointedToStreams()[0] instanceof StringsStream);
		assertTrue(s8451.getPointedToStreams()[1] instanceof StringsStream);
	}
	
	public void testChunkWithText() throws Exception {
		// Parent ChunkStream is at 0x7194
		// This is one of the last children of the trailer
		Pointer trailerPtr = ptrFactory.createPointer(contents, trailerPointerAt);
		TrailerStream ts = (TrailerStream)
			Stream.createStream(trailerPtr, contents, chunkFactory, ptrFactory);
		
		ts.findChildren(contents);
		
		assertNotNull(ts.getChildPointers());
		assertNotNull(ts.getPointedToStreams());
		assertEquals(20, ts.getChildPointers().length);
		assertEquals(20, ts.getPointedToStreams().length);
		
		assertEquals(0x7194, ts.getChildPointers()[13].getOffset());
		assertEquals(0x7194, ts.getPointedToStreams()[13].getPointer().getOffset());
		
		PointerContainingStream ps7194 = (PointerContainingStream)
			ts.getPointedToStreams()[13];
		
		// First child is at 0x64b3
		assertEquals(0x64b3, ps7194.getChildPointers()[0].getOffset());
		assertEquals(0x64b3, ps7194.getPointedToStreams()[0].getPointer().getOffset());
		
		ChunkStream cs = (ChunkStream)ps7194.getPointedToStreams()[0];
		
		// Should be 26bc bytes un-compressed
		assertEquals(0x26bc, cs.getStore().getContents().length);
		// And should have lots of children
		assertEquals(131, cs.getChunks().length);
		
		// One of which is Text
		boolean hasText = false;
		for(int i=0; i<cs.getChunks().length; i++) {
			if(cs.getChunks()[i].getName().equals("Text")) {
				hasText = true;
			}
		}
		assertTrue(hasText);
		// Which is the 72nd command
		assertEquals("Text", cs.getChunks()[72].getName());
		
		Chunk text = cs.getChunks()[72];
		assertEquals("Text", text.getName());
		
		// Which contains our text
		assertEquals(1, text.getCommands().length);
		assertEquals("Test View\n", text.getCommands()[0].getValue());
		
		
		// Almost at the end is some more text
		assertEquals("Text", cs.getChunks()[128].getName());
		text = cs.getChunks()[128];
		assertEquals("Text", text.getName());
		
		assertEquals(1, text.getCommands().length);
		assertEquals("Some random text, on a page\n", text.getCommands()[0].getValue());
	}
}