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jdbf 2.0: add ability to read DBF files with MEMO fields
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,44 @@ | ||
| package net.iryndin.jdbf.core; | ||
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| import net.iryndin.jdbf.util.BitUtils; | ||
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| /** | ||
| * See http://msdn.microsoft.com/en-US/library/8599s21w(v=vs.80).aspx | ||
| */ | ||
| public class MemoFileHeader { | ||
| private byte[] headerBytes; | ||
| private int nextFreeBlockLocation; | ||
| private int blockSize; | ||
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| public static MemoFileHeader create(byte[] headerBytes) { | ||
| MemoFileHeader h = new MemoFileHeader(); | ||
| h.setHeaderBytes(headerBytes); | ||
| h.calculateHeaderFields(); | ||
| return h; | ||
| } | ||
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| private void calculateHeaderFields() { | ||
| this.nextFreeBlockLocation = BitUtils.makeInt(headerBytes[3],headerBytes[2],headerBytes[1],headerBytes[0]); | ||
| this.blockSize = BitUtils.makeInt(headerBytes[7],headerBytes[6]); | ||
| } | ||
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| private void setHeaderBytes(byte[] headerBytes) { | ||
| this.headerBytes = headerBytes; | ||
| } | ||
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| public int getNextFreeBlockLocation() { | ||
| return nextFreeBlockLocation; | ||
| } | ||
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| public int getBlockSize() { | ||
| return blockSize; | ||
| } | ||
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| @Override | ||
| public String toString() { | ||
| return "MemoFileHeader{" + | ||
| "nextFreeBlockLocation=" + nextFreeBlockLocation + | ||
| ", blockSize=" + blockSize + | ||
| '}'; | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,54 @@ | ||
| package net.iryndin.jdbf.core; | ||
|
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| import net.iryndin.jdbf.util.BitUtils; | ||
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| import java.nio.charset.Charset; | ||
|
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| public class MemoRecord { | ||
| private final int blockSize; | ||
| private final int offsetInBlocks; | ||
| private byte[] value; | ||
| private int length; | ||
| private MemoRecordTypeEnum memoType; | ||
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| public MemoRecord(byte[] header, byte[] value, int blockSize, int offsetInBlocks) { | ||
| this.value = value; | ||
| calculateFields(header); | ||
| this.blockSize = blockSize; | ||
| this.offsetInBlocks = offsetInBlocks; | ||
| } | ||
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| private void calculateFields(byte[] bytes) { | ||
| int type = BitUtils.makeInt(bytes[3],bytes[2],bytes[1],bytes[0]); | ||
| this.memoType = MemoRecordTypeEnum.fromInt(type); | ||
| this.length = BitUtils.makeInt(bytes[7],bytes[6],bytes[5],bytes[4]); | ||
| } | ||
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| public byte[] getValue() { | ||
| return value; | ||
| } | ||
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| public String getValueAsString(Charset charset) { | ||
| return new String(value, charset); | ||
| } | ||
|
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| /** | ||
| * Memo record length in bytes | ||
| * @return | ||
| */ | ||
| public int getLength() { | ||
| return length; | ||
| } | ||
|
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| public MemoRecordTypeEnum getMemoType() { | ||
| return memoType; | ||
| } | ||
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| public int getBlockSize() { | ||
| return blockSize; | ||
| } | ||
|
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| public int getOffsetInBlocks() { | ||
| return offsetInBlocks; | ||
| } | ||
| } |
21 changes: 21 additions & 0 deletions
21
src/main/java/net/iryndin/jdbf/core/MemoRecordTypeEnum.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,21 @@ | ||
| package net.iryndin.jdbf.core; | ||
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| public enum MemoRecordTypeEnum { | ||
| IMAGE(0x0), | ||
| TEXT(0x1); | ||
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| final int type; | ||
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| MemoRecordTypeEnum(int type) { | ||
| this.type= type; | ||
| } | ||
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| public static MemoRecordTypeEnum fromInt(int type) { | ||
| for (MemoRecordTypeEnum e : MemoRecordTypeEnum.values()) { | ||
| if (e.type == type) { | ||
| return e; | ||
| } | ||
| } | ||
| return null; | ||
| } | ||
| } |
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