Java ArrayUtils.subarray方法代码示例

import org.apache.commons.lang3.ArrayUtils; //导入方法依赖的package包/类
private String[] trimArgs(GameCommand child, String[] args) {
    for (int x = 0; x < args.length; x++) {
        if (args[x].equalsIgnoreCase(child.getName())) {
            return ArrayUtils.subarray(args, x + 1, args.length);
        }

        for (String alias : child.getAliases()) {
            if (args[x].equalsIgnoreCase(alias)) {
                return ArrayUtils.subarray(args, x + 1, args.length);
            }
        }
    }

    return args;
}
 

import org.apache.commons.lang3.ArrayUtils; //导入方法依赖的package包/类
/**
 * Convolution U(m)=Sum( H(m)X(n-m) )    0<=m=<(size(H)-1) n=size(H)
 * 
 * This function reproduce the matlab conv function with shape='valid'
 * 
 * @param a
 * @param b
 * @return
 */
public static double[] linearConvolutionMatlabValid(double a[],double b[]){
	//size of the array result without zero padd values
	int sizeResult=a.length+b.length-1;
	int matlabSizeResult=a.length-b.length+1;
	
	b=ArrayUtils.add(b,0);
	
	double[] u=new double[sizeResult];
	int idU=0;
	for(int n=0;n<sizeResult;n++){
		double val=0;

		for(int m=0;m<=n;m++){
			int idx1=m;
			int idx2=n-m;
			
			if(idx2>=0&&idx1>=0&&idx2<b.length-1&&idx1<a.length){
				val=val+a[idx1]*b[idx2];
			}	
		}
		u[idU]=val;
		idU++;
	}
	int diff=(sizeResult-matlabSizeResult);
	int idxStart=diff/2+diff%2;
	int idxEnd=u.length-diff/2;
	u=ArrayUtils.subarray(u, idxStart, idxEnd);
	
	
	return u; 
}
 

import org.apache.commons.lang3.ArrayUtils; //导入方法依赖的package包/类
/**
 * Convolution U(m)=Sum( H(m)X(n-m) )    0<=m=<(size(H)-1) n=size(H)
 * 
 * This function reproduce the matlab conv function with shape='valid'
 * 
 * @param a
 * @param b
 * @return
 */
public static double[] linearConvolutionMatlabValid(double a[],double b[]){
	//size of the array result without zero padd values
	int sizeResult=a.length+b.length-1;
	int matlabSizeResult=a.length-b.length+1;
	
	b=ArrayUtils.add(b,0);
	List<Integer> idxPadded=new ArrayList<Integer>();
	
	double[] u=new double[sizeResult];
	int idU=0;
	for(int n=0;n<sizeResult;n++){
		double val=0;
		
		
		for(int m=0;m<=n;m++){
			
			int idx1=m;
			int idx2=n-m;
			
			if(idx2>=0&&idx1>=0&&idx2<b.length-1&&idx1<a.length){
				val=val+a[idx1]*b[idx2];
			}	
		}

		u[idU]=val;
		idU++;
	}
	int diff=(sizeResult-matlabSizeResult);
	int idxStart=diff/2+diff%2;
	int idxEnd=u.length-diff/2;
	u=ArrayUtils.subarray(u, idxStart, idxEnd);
	
	
	return u; 
}
 

import org.apache.commons.lang3.ArrayUtils; //导入方法依赖的package包/类
/**
 * Gets the various sections of the crash report into the given StringBuilder
 */
public void getSectionsInStringBuilder(StringBuilder builder)
{
    if ((this.stacktrace == null || this.stacktrace.length <= 0) && this.crashReportSections.size() > 0)
    {
        this.stacktrace = (StackTraceElement[])ArrayUtils.subarray(((CrashReportCategory)this.crashReportSections.get(0)).getStackTrace(), 0, 1);
    }

    if (this.stacktrace != null && this.stacktrace.length > 0)
    {
        builder.append("-- Head --\n");
        builder.append("Stacktrace:\n");

        for (StackTraceElement stacktraceelement : this.stacktrace)
        {
            builder.append("\t").append("at ").append(stacktraceelement.toString());
            builder.append("\n");
        }

        builder.append("\n");
    }

    for (CrashReportCategory crashreportcategory : this.crashReportSections)
    {
        crashreportcategory.appendToStringBuilder(builder);
        builder.append("\n\n");
    }

    this.theReportCategory.appendToStringBuilder(builder);
}
 

import org.apache.commons.lang3.ArrayUtils; //导入方法依赖的package包/类
/**
 * Gets the various sections of the crash report into the given StringBuilder
 */
public void getSectionsInStringBuilder(StringBuilder builder)
{
    if ((this.stacktrace == null || this.stacktrace.length <= 0) && this.crashReportSections.size() > 0)
    {
        this.stacktrace = (StackTraceElement[])((StackTraceElement[])ArrayUtils.subarray(((CrashReportCategory)this.crashReportSections.get(0)).getStackTrace(), 0, 1));
    }

    if (this.stacktrace != null && this.stacktrace.length > 0)
    {
        builder.append("-- Head --\n");
        builder.append("Stacktrace:\n");

        for (StackTraceElement stacktraceelement : this.stacktrace)
        {
            builder.append("\t").append("at ").append(stacktraceelement.toString());
            builder.append("\n");
        }

        builder.append("\n");
    }

    for (Object crashreportcategory : this.crashReportSections)
    {
        ((CrashReportCategory)crashreportcategory).appendToStringBuilder(builder);
        builder.append("\n\n");
    }

    this.theReportCategory.appendToStringBuilder(builder);
}
 

import org.apache.commons.lang3.ArrayUtils; //导入方法依赖的package包/类
/**
 * Gets the various sections of the crash report into the given StringBuilder
 */
public void getSectionsInStringBuilder(StringBuilder builder)
{
    if ((this.stacktrace == null || this.stacktrace.length <= 0) && this.crashReportSections.size() > 0)
    {
        this.stacktrace = (StackTraceElement[])((StackTraceElement[])ArrayUtils.subarray(((CrashReportCategory)this.crashReportSections.get(0)).getStackTrace(), 0, 1));
    }

    if (this.stacktrace != null && this.stacktrace.length > 0)
    {
        builder.append("-- Head --\n");
        builder.append("Stacktrace:\n");

        for (StackTraceElement stacktraceelement : this.stacktrace)
        {
            builder.append("\t").append("at ").append(stacktraceelement.toString());
            builder.append("\n");
        }

        builder.append("\n");
    }

    for (Object crashreportcategory : this.crashReportSections)
    {
        ((CrashReportCategory) crashreportcategory).appendToStringBuilder(builder);
        builder.append("\n\n");
    }

    this.theReportCategory.appendToStringBuilder(builder);
}
 

import org.apache.commons.lang3.ArrayUtils; //导入方法依赖的package包/类
private static void checkMagicBytes(FileStatus status, byte[] data, int offset) throws IOException {
  for(int i =0, v = offset; i < MAGIC_LENGTH; i++, v++){
    if(ParquetFileWriter.MAGIC[i] != data[v]){
      byte[] magic = ArrayUtils.subarray(data, offset, offset + MAGIC_LENGTH);
      throw new IOException(status.getPath() + " is not a Parquet file. expected magic number at tail " + Arrays.toString(ParquetFileWriter.MAGIC) + " but found " + Arrays.toString(magic));
    }
  }
}
 

import org.apache.commons.lang3.ArrayUtils; //导入方法依赖的package包/类
/**
 * An updated footer reader that tries to read the entire footer without knowing the length.
 * This should reduce the amount of seek/read roundtrips in most workloads.
 * @param fs
 * @param status
 * @return
 * @throws IOException
 */
public static Footer readFooter(final Configuration config, final FileStatus status) throws IOException {
  final FileSystem fs = status.getPath().getFileSystem(config);
  try(FSDataInputStream file = fs.open(status.getPath())) {

    final long fileLength = status.getLen();
    Preconditions.checkArgument(fileLength >= MIN_FILE_SIZE, "%s is not a Parquet file (too small)", status.getPath());

    int len = (int) Math.min( fileLength, (long) DEFAULT_READ_SIZE);
    byte[] footerBytes = new byte[len];
    readFully(file, fileLength - len, footerBytes, 0, len);

    checkMagicBytes(status, footerBytes, footerBytes.length - ParquetFileWriter.MAGIC.length);
    final int size = BytesUtils.readIntLittleEndian(footerBytes, footerBytes.length - FOOTER_METADATA_SIZE);

    if(size > footerBytes.length - FOOTER_METADATA_SIZE){
      // if the footer is larger than our initial read, we need to read the rest.
      byte[] origFooterBytes = footerBytes;
      int origFooterRead = origFooterBytes.length - FOOTER_METADATA_SIZE;

      footerBytes = new byte[size];

      readFully(file, fileLength - size - FOOTER_METADATA_SIZE, footerBytes, 0, size - origFooterRead);
      System.arraycopy(origFooterBytes, 0, footerBytes, size - origFooterRead, origFooterRead);
    }else{
      int start = footerBytes.length - (size + FOOTER_METADATA_SIZE);
      footerBytes = ArrayUtils.subarray(footerBytes, start, start + size);
    }

    ParquetMetadata metadata = ParquetFormatPlugin.parquetMetadataConverter.readParquetMetadata(new ByteArrayInputStream(footerBytes));
    Footer footer = new Footer(status.getPath(), metadata);
    return footer;
  }
}
 

import org.apache.commons.lang3.ArrayUtils; //导入方法依赖的package包/类
/**
 * Gets the various sections of the crash report into the given StringBuilder
 */
public void getSectionsInStringBuilder(StringBuilder builder)
{
    if ((this.stacktrace == null || this.stacktrace.length <= 0) && !this.crashReportSections.isEmpty())
    {
        this.stacktrace = (StackTraceElement[])((StackTraceElement[])ArrayUtils.subarray(((CrashReportCategory)this.crashReportSections.get(0)).getStackTrace(), 0, 1));
    }

    if (this.stacktrace != null && this.stacktrace.length > 0)
    {
        builder.append("-- Head --\n");
        builder.append("Thread: ").append(Thread.currentThread().getName()).append("\n");
        builder.append("Stacktrace:\n");

        for (StackTraceElement stacktraceelement : this.stacktrace)
        {
            builder.append("\t").append("at ").append((Object)stacktraceelement);
            builder.append("\n");
        }

        builder.append("\n");
    }

    for (CrashReportCategory crashreportcategory : this.crashReportSections)
    {
        crashreportcategory.appendToStringBuilder(builder);
        builder.append("\n\n");
    }

    this.theReportCategory.appendToStringBuilder(builder);
}
 

import org.apache.commons.lang3.ArrayUtils; //导入方法依赖的package包/类
/**
 * An updated footer reader that tries to read the entire footer without knowing the length.
 * This should reduce the amount of seek/read roundtrips in most workloads.
 * @param fs
 * @param status
 * @return
 * @throws IOException
 */
public static ParquetMetadata readFooter(
  final FileSystem fs,
  final FileStatus status,
  ParquetMetadataConverter.MetadataFilter filter) throws IOException {
  try(FSDataInputStream file = fs.open(status.getPath())) {
    final long fileLength = status.getLen();
    Preconditions.checkArgument(fileLength >= MIN_FILE_SIZE, "%s is not a Parquet file (too small)", status.getPath());

    int len = (int) Math.min( fileLength, (long) DEFAULT_READ_SIZE);
    byte[] footerBytes = new byte[len];
    readFully(file, fileLength - len, footerBytes, 0, len);

    checkMagicBytes(status, footerBytes, footerBytes.length - ParquetFileWriter.MAGIC.length);
    final int size = BytesUtils.readIntLittleEndian(footerBytes, footerBytes.length - FOOTER_METADATA_SIZE);

    if(size > footerBytes.length - FOOTER_METADATA_SIZE){
      // if the footer is larger than our initial read, we need to read the rest.
      byte[] origFooterBytes = footerBytes;
      int origFooterRead = origFooterBytes.length - FOOTER_METADATA_SIZE;

      footerBytes = new byte[size];

      readFully(file, fileLength - size - FOOTER_METADATA_SIZE, footerBytes, 0, size - origFooterRead);
      System.arraycopy(origFooterBytes, 0, footerBytes, size - origFooterRead, origFooterRead);
    }else{
      int start = footerBytes.length - (size + FOOTER_METADATA_SIZE);
      footerBytes = ArrayUtils.subarray(footerBytes, start, start + size);
    }

    return ParquetFormatPlugin.parquetMetadataConverter.readParquetMetadata(new ByteArrayInputStream(footerBytes), filter);
  }
}
 

import org.apache.commons.lang3.ArrayUtils; //导入方法依赖的package包/类
/**
 * Gets the various sections of the crash report into the given StringBuilder
 */
public void getSectionsInStringBuilder(StringBuilder builder)
{
    if ((this.stacktrace == null || this.stacktrace.length <= 0) && !this.crashReportSections.isEmpty())
    {
        this.stacktrace = (StackTraceElement[])ArrayUtils.subarray(((CrashReportCategory)this.crashReportSections.get(0)).getStackTrace(), 0, 1);
    }

    if (this.stacktrace != null && this.stacktrace.length > 0)
    {
        builder.append("-- Head --\n");
        builder.append("Thread: ").append(Thread.currentThread().getName()).append("\n");
        builder.append("Stacktrace:\n");

        for (StackTraceElement stacktraceelement : this.stacktrace)
        {
            builder.append("\t").append("at ").append((Object)stacktraceelement);
            builder.append("\n");
        }

        builder.append("\n");
    }

    for (CrashReportCategory crashreportcategory : this.crashReportSections)
    {
        crashreportcategory.appendToStringBuilder(builder);
        builder.append("\n\n");
    }

    this.theReportCategory.appendToStringBuilder(builder);
}
 

import org.apache.commons.lang3.ArrayUtils; //导入方法依赖的package包/类
private byte[] getValidBytes(ByteBuffer byteBuffer) {
	return ArrayUtils.subarray(byteBuffer.array(), byteBuffer.position(),
			byteBuffer.limit());
}
 

import org.apache.commons.lang3.ArrayUtils; //导入方法依赖的package包/类
CloseableRecordBatch getReaderBatch(FragmentContext context, EasySubScan scan) throws ExecutionSetupException {
  String partitionDesignator = context.getOptions()
    .getOption(ExecConstants.FILESYSTEM_PARTITION_COLUMN_LABEL).string_val;
  List<SchemaPath> columns = scan.getColumns();
  List<RecordReader> readers = Lists.newArrayList();
  List<String[]> partitionColumns = Lists.newArrayList();
  List<Integer> selectedPartitionColumns = Lists.newArrayList();
  boolean selectAllColumns = false;

  if (columns == null || columns.size() == 0 || AbstractRecordReader.isStarQuery(columns)) {
    selectAllColumns = true;
  } else {
    List<SchemaPath> newColumns = Lists.newArrayList();
    Pattern pattern = Pattern.compile(String.format("%s[0-9]+", partitionDesignator));
    for (SchemaPath column : columns) {
      Matcher m = pattern.matcher(column.getAsUnescapedPath());
      if (m.matches()) {
        selectedPartitionColumns.add(Integer.parseInt(column.getAsUnescapedPath().toString().substring(partitionDesignator.length())));
      } else {
        newColumns.add(column);
      }
    }

    // We must make sure to pass a table column(not to be confused with partition column) to the underlying record
    // reader.
    if (newColumns.size()==0) {
      newColumns.add(AbstractRecordReader.STAR_COLUMN);
    }
    // Create a new sub scan object with the new set of columns;
    EasySubScan newScan = new EasySubScan(scan.getUserName(), scan.getWorkUnits(), scan.getFormatPlugin(),
        newColumns, scan.getSelectionRoot());
    newScan.setOperatorId(scan.getOperatorId());
    scan = newScan;
  }

  int numParts = 0;
  OperatorContext oContext = context.newOperatorContext(scan, false /*
                                                                     * ScanBatch is not subject to fragment memory
                                                                     * limit
                                                                     */);
  final DrillFileSystem dfs;
  try {
    dfs = oContext.newFileSystem(fsConf);
  } catch (IOException e) {
    throw new ExecutionSetupException(String.format("Failed to create FileSystem: %s", e.getMessage()), e);
  }

  for(FileWork work : scan.getWorkUnits()){
    readers.add(getRecordReader(context, dfs, work, scan.getColumns()));
    if (scan.getSelectionRoot() != null) {
      String[] r = Path.getPathWithoutSchemeAndAuthority(new Path(scan.getSelectionRoot())).toString().split("/");
      String[] p = Path.getPathWithoutSchemeAndAuthority(new Path(work.getPath())).toString().split("/");
      if (p.length > r.length) {
        String[] q = ArrayUtils.subarray(p, r.length, p.length - 1);
        partitionColumns.add(q);
        numParts = Math.max(numParts, q.length);
      } else {
        partitionColumns.add(new String[] {});
      }
    } else {
      partitionColumns.add(new String[] {});
    }
  }

  if (selectAllColumns) {
    for (int i = 0; i < numParts; i++) {
      selectedPartitionColumns.add(i);
    }
  }

  return new ScanBatch(scan, context, oContext, readers.iterator(), partitionColumns, selectedPartitionColumns);
}
 

import org.apache.commons.lang3.ArrayUtils; //导入方法依赖的package包/类
private void putChunk(String fileCacheKey, byte[] buffer, int chunkPos, int endPos) throws ECFileCacheException {
  byte[] chunk = ArrayUtils.subarray(buffer, chunkPos, endPos);
  InputStream inputStream = new ByteArrayInputStream(chunk);
  client.putFile(fileCacheKey, chunkPos, inputStream, 0);
  IOUtils.closeQuietly(inputStream);
}
 

import org.apache.commons.lang3.ArrayUtils; //导入方法依赖的package包/类
private void refreshList(@Nullable GreatUri thisUri, boolean add, boolean delete) {
    int max_recent_files = 15;
    if(add)
        max_recent_files--;

    // File paths saved in preferences
    String[] savedPaths = PreferenceHelper.getSavedPaths(this);
    int first_index_of_array = savedPaths.length > max_recent_files ? savedPaths.length - max_recent_files : 0;
    savedPaths = ArrayUtils.subarray(savedPaths, first_index_of_array, savedPaths.length);
    // File names for the list
    greatUris.clear();
    // StringBuilder that will contain the file paths
    StringBuilder sb = new StringBuilder();

    // for cycle to convert paths to names
    for(int i = 0; i < savedPaths.length; i++){
        Uri particularUri = Uri.parse(savedPaths[i]);
        String name = AccessStorageApi.getName(this, particularUri);
        // Check that the file exist
        // if is null or empty the particular url we dont use it
        if (particularUri != null && !particularUri.equals(Uri.EMPTY) && !TextUtils.isEmpty(name)) {
            // if the particular uri is good
            boolean good = false;
            if (thisUri == null || thisUri.getUri() == null || thisUri.getUri() == Uri.EMPTY)
                good = true;
            else {
                if (delete == false)
                    good = true;
                else if (!thisUri.getUri().equals(particularUri))
                    good = true;
                else
                    good = false;
            }
            if (good) {
                greatUris.addFirst(new GreatUri(particularUri, AccessStorageApi.getPath(this, particularUri), name));
                sb.append(savedPaths[i]).append(",");
            }
        }
        //}
    }
    // if is not null, empty, we have to add something and we dont already have this uri
    if(thisUri != null && !thisUri.getUri().equals(Uri.EMPTY) && add && !ArrayUtils.contains(savedPaths, thisUri.getUri().toString())) {
        sb.append(thisUri.getUri().toString()).append(",");
        greatUris.addFirst(thisUri);
    }
    // save list without empty or non existed files
    PreferenceHelper.setSavedPaths(this, sb);
    // Set adapter
    arrayAdapter.notifyDataSetChanged();
}