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Merge pull request #184 from ate47/dev_diffcat
Add diffBit into k-HDTCat
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134 changes: 134 additions & 0 deletions
134
hdt-java-core/src/main/java/org/rdfhdt/hdt/compact/bitmap/EmptyBitmap.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,134 @@ | ||
| package org.rdfhdt.hdt.compact.bitmap; | ||
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| import org.rdfhdt.hdt.compact.integer.VByte; | ||
| import org.rdfhdt.hdt.exceptions.NotImplementedException; | ||
| import org.rdfhdt.hdt.hdt.HDTVocabulary; | ||
| import org.rdfhdt.hdt.listener.ProgressListener; | ||
| import org.rdfhdt.hdt.util.crc.CRC32; | ||
| import org.rdfhdt.hdt.util.crc.CRC8; | ||
| import org.rdfhdt.hdt.util.crc.CRCOutputStream; | ||
| import org.rdfhdt.hdt.util.io.IOUtil; | ||
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| import java.io.IOException; | ||
| import java.io.InputStream; | ||
| import java.io.OutputStream; | ||
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| /** | ||
| * empty bitmap, act like a bitmap filled with 0, but isn't allocated on disk or in memory, | ||
| * will throw a {@link org.rdfhdt.hdt.exceptions.NotImplementedException} if we try to add | ||
| * a non 0 value | ||
| */ | ||
| public class EmptyBitmap implements ModifiableBitmap { | ||
| /** | ||
| * create empty bitmap simulating a bitmap of a particular size | ||
| * | ||
| * @param size the size | ||
| * @return bitmap | ||
| */ | ||
| public static ModifiableBitmap of(long size) { | ||
| return new EmptyBitmap(size); | ||
| } | ||
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| private long size; | ||
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| private EmptyBitmap(long size) { | ||
| this.size = size; | ||
| } | ||
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| @Override | ||
| public void append(boolean value) { | ||
| set(size, value); | ||
| } | ||
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| @Override | ||
| public void set(long pos, boolean value) { | ||
| if (value) { | ||
| throw new NotImplementedException("true value in EmptyBitmap"); | ||
| } | ||
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| size = Math.max(size, pos); | ||
| } | ||
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| @Override | ||
| public boolean access(long pos) { | ||
| return false; | ||
| } | ||
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| @Override | ||
| public long rank1(long pos) { | ||
| return 0; | ||
| } | ||
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| @Override | ||
| public long rank0(long pos) { | ||
| return pos; | ||
| } | ||
|
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| @Override | ||
| public long selectPrev1(long start) { | ||
| return -1; | ||
| } | ||
|
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| @Override | ||
| public long selectNext1(long start) { | ||
| return -1; | ||
| } | ||
|
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| @Override | ||
| public long select0(long n) { | ||
| return n; | ||
| } | ||
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| @Override | ||
| public long select1(long n) { | ||
| return -1; | ||
| } | ||
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| @Override | ||
| public long getNumBits() { | ||
| return size; | ||
| } | ||
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| @Override | ||
| public long countOnes() { | ||
| return 0; | ||
| } | ||
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| @Override | ||
| public long countZeros() { | ||
| return size; | ||
| } | ||
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| @Override | ||
| public long getSizeBytes() { | ||
| return 0; | ||
| } | ||
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| @Override | ||
| public void save(OutputStream output, ProgressListener listener) throws IOException { | ||
| CRCOutputStream out = new CRCOutputStream(output, new CRC8()); | ||
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| // Write Type and Numbits | ||
| out.write(BitmapFactory.TYPE_BITMAP_PLAIN); | ||
| VByte.encode(out, 8L); | ||
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| // Write CRC | ||
| out.writeCRC(); | ||
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| // Setup new CRC | ||
| out.setCRC(new CRC32()); | ||
| IOUtil.writeLong(out, 0); | ||
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| out.writeCRC(); | ||
| } | ||
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| @Override | ||
| public void load(InputStream input, ProgressListener listener) { | ||
| throw new NotImplementedException(); | ||
| } | ||
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| @Override | ||
| public String getType() { | ||
| return HDTVocabulary.BITMAP_TYPE_PLAIN; | ||
| } | ||
| } |
139 changes: 139 additions & 0 deletions
139
hdt-java-core/src/main/java/org/rdfhdt/hdt/compact/bitmap/NegBitmap.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,139 @@ | ||
| package org.rdfhdt.hdt.compact.bitmap; | ||
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| import org.rdfhdt.hdt.exceptions.NotImplementedException; | ||
| import org.rdfhdt.hdt.listener.ProgressListener; | ||
|
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| import java.io.Closeable; | ||
| import java.io.IOException; | ||
| import java.io.InputStream; | ||
| import java.io.OutputStream; | ||
|
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| /** | ||
| * create a negation bitmap of another one, the close method is called if the bitmap implements closeable | ||
| * | ||
| * access/set are negate when called | ||
| * | ||
| * @param <T> bitmap type | ||
| */ | ||
| public class NegBitmap<T extends Bitmap> implements Bitmap, Closeable { | ||
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| /** | ||
| * create from a bitmap | ||
| * | ||
| * @param bitmap bitmap | ||
| * @return bitmap | ||
| */ | ||
| public static Bitmap of(Bitmap bitmap) { | ||
| return new NegBitmap<>(bitmap); | ||
| } | ||
|
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| /** | ||
| * create from a modifiableBitmap | ||
| * | ||
| * @param modifiableBitmap modifiableBitmap | ||
| * @return modifiableBitmap | ||
| */ | ||
| public static ModifiableBitmap of(ModifiableBitmap modifiableBitmap) { | ||
| return new NegModifiableBitmap(modifiableBitmap); | ||
| } | ||
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| private static class NegModifiableBitmap extends NegBitmap<ModifiableBitmap> implements ModifiableBitmap { | ||
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| private NegModifiableBitmap(ModifiableBitmap handle) { | ||
| super(handle); | ||
| } | ||
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| @Override | ||
| public void set(long position, boolean value) { | ||
| handle.set(position, !value); | ||
| } | ||
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| @Override | ||
| public void append(boolean value) { | ||
| handle.append(!value); | ||
| } | ||
| } | ||
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| protected final T handle; | ||
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| private NegBitmap(T handle) { | ||
| this.handle = handle; | ||
| } | ||
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| @Override | ||
| public boolean access(long position) { | ||
| return !handle.access(position); | ||
| } | ||
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| @Override | ||
| public long rank1(long position) { | ||
| return handle.rank0(position); | ||
| } | ||
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| @Override | ||
| public long rank0(long position) { | ||
| return handle.rank1(position); | ||
| } | ||
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| @Override | ||
| public long selectPrev1(long start) { | ||
| throw new NotImplementedException(); | ||
| } | ||
|
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| @Override | ||
| public long selectNext1(long start) { | ||
| throw new NotImplementedException(); | ||
| } | ||
|
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| @Override | ||
| public long select0(long n) { | ||
| return handle.select1(n); | ||
| } | ||
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| @Override | ||
| public long select1(long n) { | ||
| return handle.select0(n); | ||
| } | ||
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| @Override | ||
| public long getNumBits() { | ||
| return handle.getNumBits(); | ||
| } | ||
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| @Override | ||
| public long countOnes() { | ||
| return handle.countZeros(); | ||
| } | ||
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| @Override | ||
| public long countZeros() { | ||
| return handle.countOnes(); | ||
| } | ||
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| @Override | ||
| public long getSizeBytes() { | ||
| return handle.getSizeBytes(); | ||
| } | ||
|
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| @Override | ||
| public void save(OutputStream output, ProgressListener listener) throws IOException { | ||
| throw new NotImplementedException(); | ||
| } | ||
|
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| @Override | ||
| public void load(InputStream input, ProgressListener listener) throws IOException { | ||
| throw new NotImplementedException(); | ||
| } | ||
|
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| @Override | ||
| public String getType() { | ||
| return handle.getType(); | ||
| } | ||
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| @Override | ||
| public void close() throws IOException { | ||
| if (handle instanceof Closeable) { | ||
| ((Closeable) handle).close(); | ||
| } | ||
| } | ||
| } |
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