Java BytesUtil.compareBytes方法代码示例

import org.apache.kylin.common.util.BytesUtil; //导入方法依赖的package包/类
private void init() {
    if (BytesUtil.compareBytes(HEAD_MAGIC, 0, trieBytes, 0, HEAD_MAGIC.length) != 0)
        throw new IllegalArgumentException("Wrong file type (magic does not match)");

    try {
        DataInputStream headIn = new DataInputStream(new ByteArrayInputStream(trieBytes, HEAD_SIZE_I, trieBytes.length - HEAD_SIZE_I));
        this.headSize = headIn.readShort();
        this.bodyLen = headIn.readInt();
        this.nValues = headIn.readInt();
        this.sizeChildOffset = headIn.read();
        this.sizeOfId = headIn.read();

        this.childOffsetMask = ~(((long) (BIT_IS_LAST_CHILD | BIT_IS_END_OF_VALUE)) << ((sizeChildOffset - 1) * 8));
        this.firstByteOffset = sizeChildOffset + 1; // the offset from begin of node to its first value byte
    } catch (Exception e) {
        if (e instanceof RuntimeException)
            throw (RuntimeException) e;
        else
            throw new RuntimeException(e);
    }
}
 

import org.apache.kylin.common.util.BytesUtil; //导入方法依赖的package包/类
public static AppendDictSlice deserializeFrom(DataInput in) throws IOException {
    byte[] headPartial = new byte[HEAD_MAGIC.length + Short.SIZE / Byte.SIZE + Integer.SIZE / Byte.SIZE];
    in.readFully(headPartial);

    if (BytesUtil.compareBytes(HEAD_MAGIC, 0, headPartial, 0, HEAD_MAGIC.length) != 0)
        throw new IllegalArgumentException("Wrong file type (magic does not match)");

    DataInputStream headIn = new DataInputStream(//
            new ByteArrayInputStream(headPartial, HEAD_SIZE_I, headPartial.length - HEAD_SIZE_I));
    int headSize = headIn.readShort();
    int bodyLen = headIn.readInt();
    headIn.close();

    byte[] all = new byte[headSize + bodyLen];
    System.arraycopy(headPartial, 0, all, 0, headPartial.length);
    in.readFully(all, headPartial.length, all.length - headPartial.length);

    return new AppendDictSlice(all);
}
 

import org.apache.kylin.common.util.BytesUtil; //导入方法依赖的package包/类
@Override
public void readFields(DataInput in) throws IOException {
    byte[] headPartial = new byte[MAGIC.length + Short.SIZE + Integer.SIZE];
    in.readFully(headPartial);

    if (BytesUtil.compareBytes(MAGIC, 0, headPartial, 0, MAGIC.length) != 0)
        throw new IllegalArgumentException("Wrong file type (magic does not match)");

    DataInputStream headIn = new DataInputStream(//
            new ByteArrayInputStream(headPartial, MAGIC_SIZE_I, headPartial.length - MAGIC_SIZE_I));
    int headSize = headIn.readShort();
    int bodyLen = headIn.readInt();
    headIn.close();

    byte[] all = new byte[headSize + bodyLen];
    System.arraycopy(headPartial, 0, all, 0, headPartial.length);
    in.readFully(all, headPartial.length, all.length - headPartial.length);

    init(all);
}
 

import org.apache.kylin.common.util.BytesUtil; //导入方法依赖的package包/类
private void init(byte[] trieBytes) {
    this.trieBytes = trieBytes;
    if (BytesUtil.compareBytes(MAGIC, 0, trieBytes, 0, MAGIC.length) != 0)
        throw new IllegalArgumentException("Wrong file type (magic does not match)");

    try {
        DataInputStream headIn = new DataInputStream(//
                new ByteArrayInputStream(trieBytes, MAGIC_SIZE_I, trieBytes.length - MAGIC_SIZE_I));
        this.headSize = headIn.readShort();
        this.bodyLen = headIn.readInt();
        this.sizeChildOffset = headIn.read();
        this.sizeNoValuesBeneath = headIn.read();
        this.baseId = headIn.readShort();
        this.maxValueLength = headIn.readShort();
        if (maxValueLength < 0) {
            throw new IllegalStateException("maxValueLength is negative (" + maxValueLength
                    + "). Dict value is too long, whose length is larger than " + Short.MAX_VALUE);
        }

        String converterName = headIn.readUTF();
        if (converterName.isEmpty() == false)
            setConverterByName(converterName);

        this.nValues = BytesUtil.readUnsigned(trieBytes, headSize + sizeChildOffset, sizeNoValuesBeneath);
        this.sizeOfId = BytesUtil.sizeForValue(baseId + nValues + 1L); // note baseId could raise 1 byte in ID space, +1 to reserve all 0xFF for NULL case
        this.childOffsetMask = ~((long) (BIT_IS_LAST_CHILD | BIT_IS_END_OF_VALUE) << ((sizeChildOffset - 1) * 8));
        this.firstByteOffset = sizeChildOffset + sizeNoValuesBeneath + 1; // the offset from begin of node to its first value byte
        enableCache();
    } catch (Exception e) {
        if (e instanceof RuntimeException)
            throw (RuntimeException) e;
        else
            throw new RuntimeException(e);
    }
}
 

import org.apache.kylin.common.util.BytesUtil; //导入方法依赖的package包/类
public static Cell findCell(List<Cell> cells, byte[] familyName, byte[] columnName) {
    for (Cell c : cells) {
        if (BytesUtil.compareBytes(familyName, 0, c.getFamilyArray(), c.getFamilyOffset(), familyName.length) == 0 && //
                BytesUtil.compareBytes(columnName, 0, c.getQualifierArray(), c.getQualifierOffset(), columnName.length) == 0) {
            return c;
        }
    }
    return null;
}
 

import org.apache.kylin.common.util.BytesUtil; //导入方法依赖的package包/类
public boolean[] checkCache(GTRecord record) {
    if (!enabled)
        return null;

    count++;

    // disable the cache if the hit rate is bad
    if (count == CHECKPOINT) {
        if ((double) hit / (double) count < HIT_RATE_THRESHOLD) {
            enabled = false;
        }
    }

    boolean match = count > 1;
    int p = 0;
    for (int i = 0; i < colsInFilter.trueBitCount(); i++) {
        int c = colsInFilter.trueBitAt(i);
        ByteArray col = record.get(c);
        if (match) {
            match = BytesUtil.compareBytes(col.array(), col.offset(), lastValues, p, col.length()) == 0;
        }
        if (!match) {
            System.arraycopy(col.array(), col.offset(), lastValues, p, col.length());
        }
        p += col.length();
    }

    if (match) {
        hit++;
        return lastResult;
    } else {
        return null;
    }
}