Example usage for org.apache.hadoop.io InputBuffer reset

Introduction

In this page you can find the example usage for org.apache.hadoop.io InputBuffer reset.

Prototype

public void reset(byte[] input, int length) 

Source Link

Document

Resets the data that the buffer reads.

Usage

From source file:com.asakusafw.runtime.directio.util.DelimiterRangeInputStreamTest.java

License:Apache License

/**
 * all patterns for read byte.// w  ww  .j  a v a  2  s .  com
 * @throws Exception if failed
 */
@Test
public void readByte_random() throws Exception {
    byte[] bytes = "ABC|D|EF".getBytes(StandardCharsets.US_ASCII);
    InputBuffer buffer = new InputBuffer();
    buffer.reset(bytes, bytes.length);
    Random random = new Random(12345);
    for (int i = 0; i < 100000; i++) {
        int[] bounds = new int[5];
        for (int j = 0; j < bounds.length; j++) {
            bounds[j] = random.nextInt(bytes.length + 1);
        }
        Arrays.sort(bounds);
        StringBuilder buf = new StringBuilder();
        int start = 0;
        for (int j = 0; j < bounds.length; j++) {
            int end = bounds[j];
            copy(buffer, buf, start, end);
            start = end;
        }
        copy(buffer, buf, start, bytes.length);
        assertThat(Arrays.toString(bounds), buf.toString(), is("ABC|D|EF"));
    }
}

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From source file:com.asakusafw.runtime.directio.util.DelimiterRangeInputStreamTest.java

License:Apache License

/**
 * all patterns for read byte.//from www  .  ja  v a  2s. c  o  m
 * @throws Exception if failed
 */
@Test
public void readArray_random() throws Exception {
    byte[] bytes = "ABC|D|EF".getBytes(StandardCharsets.US_ASCII);
    InputBuffer buffer = new InputBuffer();
    buffer.reset(bytes, bytes.length);
    Random random = new Random(12345);
    for (int i = 0; i < 100000; i++) {
        int[] bounds = new int[5];
        for (int j = 0; j < bounds.length; j++) {
            bounds[j] = random.nextInt(bytes.length + 1);
        }
        Arrays.sort(bounds);
        StringBuilder buf = new StringBuilder();
        int start = 0;
        for (int j = 0; j < bounds.length; j++) {
            int end = bounds[j];
            copy(buffer, buf, start, end, 4);
            start = end;
        }
        copy(buffer, buf, start, bytes.length, 4);
        assertThat(Arrays.toString(bounds), buf.toString(), is("ABC|D|EF"));
    }
}

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