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Initial support for HDGF pointers, along with tests 

git-svn-id: https://svn.apache.org/repos/asf/jakarta/poi/trunk@548461 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Nick Burch 2007-06-18 19:39:29 +00:00
parent 0b42cc2713
commit 61fdc5c0e1
5 changed files with 283 additions and 1 deletions
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2
src/scratchpad/src/org/apache/poi/hdgf/HDGFDiagram.java
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@ -198,7 +198,7 @@ public class HDGFDiagram {
int nPointersAt = (int)LittleEndian.getUInt(contents, 0);
int numPointers = (int)LittleEndian.getUInt(contents, nPointersAt);
int unknownA = (int)LittleEndian.getUInt(contents, nPointersAt+4);
pointers = new VisioPointer[numPointers];
int pos = nPointersAt + 8;
for(int i=0; i<numPointers; i++) {

51
src/scratchpad/src/org/apache/poi/hdgf/pointers/Pointer.java Normal file
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@ -0,0 +1,51 @@
/* ====================================================================
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.hdgf.pointers;
/**
* Base class of pointers, which hold metadata and offsets about
* blocks elsewhere in the file
*/
public abstract class Pointer {
protected int type;
protected int address;
protected int offset;
protected int length;
protected short format;
public int getAddress() {
return address;
}
public short getFormat() {
return format;
}
public int getLength() {
return length;
}
public int getOffset() {
return offset;
}
public int getType() {
return type;
}
public abstract int getSizeInBytes();
public abstract boolean destinationHasStrings();
public abstract boolean destinationHasPointers();
public abstract boolean destinationHasChunks();
public abstract boolean destinationCompressed();
}

48
src/scratchpad/src/org/apache/poi/hdgf/pointers/PointerFactory.java Normal file
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@ -0,0 +1,48 @@
/* ====================================================================
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.hdgf.pointers;
import org.apache.poi.util.LittleEndian;
/**
* Factor class to create the appropriate pointers, based on the version
* of the file
*/
public class PointerFactory {
private int version;
public PointerFactory(int version) {
this.version = version;
}
public Pointer createPointer(byte[] data, int offset) {
Pointer p;
if(version >= 6) {
p = new PointerV6();
p.type = LittleEndian.getInt(data, offset+0);
p.address = (int)LittleEndian.getUInt(data, offset+4);
p.offset = (int)LittleEndian.getUInt(data, offset+8);
p.length = (int)LittleEndian.getUInt(data, offset+12);
p.format = LittleEndian.getShort(data, offset+16);
return p;
} else if(version == 5) {
throw new RuntimeException("TODO");
} else {
throw new IllegalArgumentException("Visio files with versions below 5 are not supported, yours was " + version);
}
}
}

44
src/scratchpad/src/org/apache/poi/hdgf/pointers/PointerV6.java Normal file
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@ -0,0 +1,44 @@
/* ====================================================================
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.hdgf.pointers;
/**
* A Pointer from v6+
*/
public class PointerV6 extends Pointer {
public boolean destinationHasStrings() {
return (0x40 <= format && format < 0x50);
}
public boolean destinationHasPointers() {
if(type == 20) return true;
if(format == 0x1d || format == 0x1e) return true;
return (0x50 <= format && format < 0x60);
}
public boolean destinationHasChunks() {
return (0xd0 <= format && format < 0xd0);
}
public boolean destinationCompressed() {
// Apparently, it's the second least significant bit
return (format & 2) > 0;
}
/**
* With v6 pointers, the on-disk size is 18 bytes
*/
public int getSizeInBytes() { return 18; }
}

139
src/scratchpad/testcases/org/apache/poi/hdgf/pointers/TestPointerFactory.java Normal file
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@ -0,0 +1,139 @@
/* ====================================================================
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.hdgf.pointers;
import junit.framework.TestCase;
/**
* Tests for the pointer factory, and the pointers themselves
*/
public class TestPointerFactory extends TestCase {
// Type: 16 Addr: 0143aff4 Offset: 80 Len: 54 Format: 46 From: 8a94
private static byte[] vp6_a = new byte[] {
22, 0, 0, 0, -12, -81, 67, 1, -128, 0, 0, 0, 84, 0, 0, 0, 70, 0
};
// Type: 17 Addr: 014fd84c Offset: d4 Len: 20 Format: 54 From: 8a94
private static byte[] vp6_b = new byte[] {
23, 0, 0, 0, 76, -40, 79, 1, -44, 0, 0, 0, 32, 0, 0, 0, 84, 0
};
// Type: 17 Addr: 014fd8bc Offset: f8 Len: 20 Format: 54 From: 8a94
private static byte[] vp6_c = new byte[] {
23, 0, 0, 0, -68, -40, 79, 1, -8, 0, 0, 0, 32, 0, 0, 0, 84, 0
};
// Type: ff Addr: 014fffac Offset: 0 Len: 0 Format: 60 From: 8a94
private static byte[] vp6_d = new byte[] {
-1, 0, 0, 0, -84, -1, 79, 1, 0, 0, 0, 0, 0, 0, 0, 0, 96, 0
};
public void testCreateV4() throws Exception {
PointerFactory pf = new PointerFactory(4);
try {
pf.createPointer(new byte[]{}, 0);
fail();
} catch(IllegalArgumentException e) {
// As expected
}
}
public void testCreateV5() throws Exception {
PointerFactory pf = new PointerFactory(5);
try {
pf.createPointer(new byte[]{}, 0);
fail();
} catch(RuntimeException e) {
// Still to do
assertEquals("TODO", e.getMessage());
}
}
public void testCreateV6() throws Exception {
PointerFactory pf = new PointerFactory(6);
Pointer a = pf.createPointer(vp6_a, 0);
assertEquals(0x16, a.getType());
assertEquals(0x0143aff4, a.getAddress());
assertEquals(0x80, a.getOffset());
assertEquals(0x54, a.getLength());
assertEquals(0x46, a.getFormat());
assertTrue(a.destinationCompressed());
assertTrue(a.destinationHasStrings());
assertFalse(a.destinationHasChunks());
assertFalse(a.destinationHasPointers());
assertEquals(18, a.getSizeInBytes());
Pointer b = pf.createPointer(vp6_b, 0);
assertEquals(0x17, b.getType());
assertEquals(0x014fd84c, b.getAddress());
assertEquals(0xd4, b.getOffset());
assertEquals(0x20, b.getLength());
assertEquals(0x54, b.getFormat());
assertFalse(b.destinationCompressed());
assertFalse(b.destinationHasStrings());
assertFalse(b.destinationHasChunks());
assertTrue(b.destinationHasPointers());
Pointer c = pf.createPointer(vp6_c, 0);
assertEquals(0x17, c.getType());
assertEquals(0x014fd8bc, c.getAddress());
assertEquals(0xf8, c.getOffset());
assertEquals(0x20, c.getLength());
assertEquals(0x54, c.getFormat());
assertFalse(c.destinationCompressed());
assertFalse(c.destinationHasStrings());
assertFalse(c.destinationHasChunks());
assertTrue(c.destinationHasPointers());
// Type: ff Addr: 014fffac Offset: 0 Len: 0 Format: 60 From: 8a94
Pointer d = pf.createPointer(vp6_d, 0);
assertEquals(0xff, d.getType());
assertEquals(0x014fffac, d.getAddress());
assertEquals(0x00, d.getOffset());
assertEquals(0x00, d.getLength());
assertEquals(0x60, d.getFormat());
assertFalse(d.destinationCompressed());
assertFalse(d.destinationHasStrings());
assertFalse(d.destinationHasChunks());
assertFalse(d.destinationHasPointers());
}
public void testCreateV6FromMid() throws Exception {
PointerFactory pf = new PointerFactory(11);
// Create a from part way down the byte stream
byte[] bytes = new byte[28];
System.arraycopy(vp6_b, 0, bytes, 0, 10);
System.arraycopy(vp6_a, 0, bytes, 10, 18);
Pointer a = pf.createPointer(bytes, 10);
assertEquals(0x16, a.getType());
assertEquals(0x0143aff4, a.getAddress());
assertEquals(0x80, a.getOffset());
assertEquals(0x54, a.getLength());
assertEquals(0x46, a.getFormat());
assertTrue(a.destinationCompressed());
assertTrue(a.destinationHasStrings());
assertFalse(a.destinationHasChunks());
assertFalse(a.destinationHasPointers());
}
}