Example usage for java.io DataInput readInt

Introduction

In this page you can find the example usage for java.io DataInput readInt.

Prototype

int readInt() throws IOException;

Source Link

Document

Reads four input bytes and returns an int value.

Usage

From source file:org.apache.pig.data.BinInterSedes.java

private Map<String, Object> readMap(DataInput in, byte type) throws IOException {
    int size;/*from   www. j  a va 2s  .  c  o  m*/
    switch (type) {
    case TINYMAP:
        size = in.readUnsignedByte();
        break;
    case SMALLMAP:
        size = in.readUnsignedShort();
        break;
    case MAP:
        size = in.readInt();
        break;
    default: {
        int errCode = 2220;
        String msg = "Unexpected data while reading map" + "from binary file.";
        throw new ExecException(msg, errCode, PigException.BUG);
    }
    }
    Map<String, Object> m = new HashMap<String, Object>(size);
    for (int i = 0; i < size; i++) {
        String key = (String) readDatum(in);
        m.put(key, readDatum(in));
    }
    return m;
}

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From source file:edu.umn.cs.spatialHadoop.core.RTree.java

@Override
public void readFields(DataInput in) throws IOException {
    // Tree size (Header + structure + data)
    treeSize = in.readInt();
    if (treeSize == 0) {
        height = elementCount = 0;//from  w ww . j  ava  2s .c  om
        return;
    }

    // Read only the tree structure in memory while actual records remain on
    // disk and loaded when necessary
    height = in.readInt();
    if (height == 0)
        return;
    degree = in.readInt();
    elementCount = in.readInt();

    // Keep only tree structure in memory
    nodeCount = (int) ((powInt(degree, height) - 1) / (degree - 1));
    int structureSize = nodeCount * NodeSize;
    byte[] treeStructure = new byte[structureSize];
    in.readFully(treeStructure, 0, structureSize);
    structure = new FSDataInputStream(new MemoryInputStream(treeStructure));
    if (in instanceof FSDataInputStream) {
        this.treeStartOffset = ((FSDataInputStream) in).getPos() - structureSize - TreeHeaderSize;
        this.data = (FSDataInputStream) in;
    } else {
        // Load all tree data in memory
        this.treeStartOffset = 0 - structureSize - TreeHeaderSize;
        int treeDataSize = treeSize - TreeHeaderSize - structureSize;
        byte[] treeData = new byte[treeDataSize];
        in.readFully(treeData, 0, treeDataSize);
        this.data = new FSDataInputStream(new MemoryInputStream(treeData));
    }
    nodeCount = (int) ((Math.pow(degree, height) - 1) / (degree - 1));
    leafNodeCount = (int) Math.pow(degree, height - 1);
    nonLeafNodeCount = nodeCount - leafNodeCount;
}

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From source file:org.apache.hadoop.hbase.KeyValue.java

/**
 * @param in Where to read bytes from.  Creates a byte array to hold the KeyValue
 * backing bytes copied from the steam.//w ww  .ja  v  a2  s  .c  o m
 * @return KeyValue created by deserializing from <code>in</code> OR if we find a length
 * of zero, we will return null which can be useful marking a stream as done.
 * @throws IOException
 */
public static KeyValue create(final DataInput in) throws IOException {
    return create(in.readInt(), in);
}

---

From source file:org.springframework.session.data.gemfire.AbstractGemFireOperationsSessionRepositoryTest.java

@Test
public void sessionAttributesFromDelta() throws Exception {
    final DataInput mockDataInput = mock(DataInput.class);

    given(mockDataInput.readInt()).willReturn(2);
    given(mockDataInput.readUTF()).willReturn("attrOne").willReturn("attrTwo");

    @SuppressWarnings("serial")
    AbstractGemFireOperationsSessionRepository.GemFireSessionAttributes sessionAttributes = new AbstractGemFireOperationsSessionRepository.GemFireSessionAttributes() {
        private int count = 0;

        @Override/*from  w w w .j  av a2 s.c om*/
        @SuppressWarnings("unchecked")
        <T> T readObject(DataInput in) throws ClassNotFoundException, IOException {
            assertThat(in).isSameAs(mockDataInput);
            return (T) Arrays.asList("testOne", "testTwo", "testThree").get(count++);
        }
    };

    sessionAttributes.setAttribute("attrOne", "one");
    sessionAttributes.setAttribute("attrTwo", "two");

    assertThat(sessionAttributes.getAttributeNames().size()).isEqualTo(2);
    assertThat(sessionAttributes.getAttributeNames().containsAll(asSet("attrOne", "attrTwo"))).isTrue();
    assertThat(String.valueOf(sessionAttributes.getAttribute("attrOne"))).isEqualTo("one");
    assertThat(String.valueOf(sessionAttributes.getAttribute("attrTwo"))).isEqualTo("two");
    assertThat(sessionAttributes.hasDelta()).isTrue();

    sessionAttributes.fromDelta(mockDataInput);

    assertThat(sessionAttributes.getAttributeNames().size()).isEqualTo(2);
    assertThat(sessionAttributes.getAttributeNames().containsAll(asSet("attrOne", "attrTwo"))).isTrue();
    assertThat(String.valueOf(sessionAttributes.getAttribute("attrOne"))).isEqualTo("testOne");
    assertThat(String.valueOf(sessionAttributes.getAttribute("attrTwo"))).isEqualTo("testTwo");
    assertThat(sessionAttributes.hasDelta()).isFalse();

    verify(mockDataInput, times(1)).readInt();
    verify(mockDataInput, times(2)).readUTF();
    reset(mockDataInput);

    given(mockDataInput.readInt()).willReturn(1);
    given(mockDataInput.readUTF()).willReturn("attrTwo");

    sessionAttributes.setAttribute("attrOne", "one");
    sessionAttributes.setAttribute("attrTwo", "two");

    assertThat(sessionAttributes.getAttributeNames().size()).isEqualTo(2);
    assertThat(sessionAttributes.getAttributeNames().containsAll(asSet("attrOne", "attrTwo"))).isTrue();
    assertThat(String.valueOf(sessionAttributes.getAttribute("attrOne"))).isEqualTo("one");
    assertThat(String.valueOf(sessionAttributes.getAttribute("attrTwo"))).isEqualTo("two");
    assertThat(sessionAttributes.hasDelta()).isTrue();

    sessionAttributes.fromDelta(mockDataInput);

    assertThat(sessionAttributes.getAttributeNames().size()).isEqualTo(2);
    assertThat(sessionAttributes.getAttributeNames().containsAll(asSet("attrOne", "attrTwo"))).isTrue();
    assertThat(String.valueOf(sessionAttributes.getAttribute("attrOne"))).isEqualTo("one");
    assertThat(String.valueOf(sessionAttributes.getAttribute("attrTwo"))).isEqualTo("testThree");
    assertThat(sessionAttributes.hasDelta()).isTrue();

    verify(mockDataInput, times(1)).readInt();
    verify(mockDataInput, times(1)).readUTF();
}

---

From source file:edu.umn.cs.spatialHadoop.indexing.RTree.java

@Override
public void readFields(DataInput in) throws IOException {
    // Read the whole tree structure and keep it in memory. Leave data on disk
    // Tree size (Header + structure + data)
    treeSize = in.readInt();

    if (in instanceof Seekable)
        this.treeStartOffset = ((Seekable) in).getPos();
    if (treeSize == 0) {
        height = elementCount = 0;//  w ww.j ava2 s . c o m
        return;
    }

    // Read only the tree structure in memory while actual records remain on
    // disk and loaded when necessary
    height = in.readInt();
    if (height == 0)
        return;
    degree = in.readInt();
    elementCount = in.readInt();

    // Keep only tree structure in memory
    nodeCount = (int) ((powInt(degree, height) - 1) / (degree - 1));
    this.nodes = new Rectangle[nodeCount];
    this.dataOffset = new int[nodeCount + 1];

    for (int node_id = 0; node_id < nodeCount; node_id++) {
        this.dataOffset[node_id] = in.readInt();
        this.nodes[node_id] = new Rectangle();
        this.nodes[node_id].readFields(in);
    }
    this.dataOffset[nodeCount] = treeSize;

    if (in instanceof FSDataInputStream) {
        // A random input stream, can keep the data on disk
        this.data = (FSDataInputStream) in;
    } else {
        // A sequential input stream, need to read all data now
        int treeDataSize = this.dataOffset[nodeCount] - this.dataOffset[0];
        // Adjust the offset of data to be zero
        this.treeStartOffset = -this.dataOffset[0];
        byte[] treeData = new byte[treeDataSize];
        in.readFully(treeData, 0, treeDataSize);
        this.data = new FSDataInputStream(new MemoryInputStream(treeData));
    }
    leafNodeCount = (int) Math.pow(degree, height - 1);
    nonLeafNodeCount = nodeCount - leafNodeCount;
}

---

From source file:org.apache.pig.data.BinInterSedes.java

private Tuple readSchemaTuple(DataInput in, byte type) throws IOException {
    int id;/*from   w ww.  j a  va  2  s  .  c  o  m*/
    switch (type) {
    case (SCHEMA_TUPLE_BYTE_INDEX):
        id = in.readUnsignedByte();
        break;
    case (SCHEMA_TUPLE_SHORT_INDEX):
        id = in.readUnsignedShort();
        break;
    case (SCHEMA_TUPLE):
        id = in.readInt();
        break;
    default:
        throw new RuntimeException("Invalid type given to readSchemaTuple: " + type);
    }

    Tuple st = SchemaTupleFactory.getInstance(id).newTuple();
    st.readFields(in);

    return st;
}

---

From source file:org.springframework.session.data.gemfire.AbstractGemFireOperationsSessionRepositoryTest.java

@Test
public void sessionFromDelta() throws Exception {
    final DataInput mockDataInput = mock(DataInput.class);

    given(mockDataInput.readLong()).willReturn(1L);
    given(mockDataInput.readInt()).willReturn(600).willReturn(0);

    @SuppressWarnings("serial")
    AbstractGemFireOperationsSessionRepository.GemFireSession session = new AbstractGemFireOperationsSessionRepository.GemFireSession() {
        @Override/*from   w ww  .  ja  va2 s . com*/
        @SuppressWarnings("unchecked")
        <T> T readObject(DataInput in) throws ClassNotFoundException, IOException {
            assertThat(in).isSameAs(mockDataInput);
            return (T) "test";
        }
    };

    session.fromDelta(mockDataInput);

    assertThat(session.hasDelta()).isFalse();
    assertThat(session.getLastAccessedTime()).isEqualTo(1L);
    assertThat(session.getMaxInactiveIntervalInSeconds()).isEqualTo(600);
    assertThat(session.getAttributeNames().isEmpty()).isTrue();

    verify(mockDataInput, times(1)).readLong();
    verify(mockDataInput, times(2)).readInt();
    verify(mockDataInput, never()).readUTF();
}

---

From source file:org.springframework.session.data.gemfire.AbstractGemFireOperationsSessionRepositoryTest.java

@Test
public void sessionFromData() throws Exception {
    final long expectedCreationTime = 1L;
    final long expectedLastAccessedTime = 2L;

    final int expectedMaxInactiveIntervalInSeconds = (int) TimeUnit.HOURS.toSeconds(6);

    final String expectedPrincipalName = "jblum";

    DataInput mockDataInput = mock(DataInput.class);

    given(mockDataInput.readUTF()).willReturn("2").willReturn(expectedPrincipalName);
    given(mockDataInput.readLong()).willReturn(expectedCreationTime).willReturn(expectedLastAccessedTime);
    given(mockDataInput.readInt()).willReturn(expectedMaxInactiveIntervalInSeconds);

    @SuppressWarnings("serial")
    AbstractGemFireOperationsSessionRepository.GemFireSession session = new AbstractGemFireOperationsSessionRepository.GemFireSession(
            "1") {
        @Override//w  w  w . jav a2  s  .c o  m
        @SuppressWarnings("unchecked")
        <T> T readObject(DataInput in) throws ClassNotFoundException, IOException {
            assertThat(in).isNotNull();

            AbstractGemFireOperationsSessionRepository.GemFireSessionAttributes sessionAttributes = new AbstractGemFireOperationsSessionRepository.GemFireSessionAttributes();

            sessionAttributes.setAttribute("attrOne", "testOne");
            sessionAttributes.setAttribute("attrTwo", "testTwo");

            return (T) sessionAttributes;
        }
    };

    session.fromData(mockDataInput);

    Set<String> expectedAttributeNames = asSet("attrOne", "attrTwo",
            FindByIndexNameSessionRepository.PRINCIPAL_NAME_INDEX_NAME);

    assertThat(session.getId()).isEqualTo("2");
    assertThat(session.getCreationTime()).isEqualTo(expectedCreationTime);
    assertThat(session.getLastAccessedTime()).isEqualTo(expectedLastAccessedTime);
    assertThat(session.getMaxInactiveIntervalInSeconds()).isEqualTo(expectedMaxInactiveIntervalInSeconds);
    assertThat(session.getPrincipalName()).isEqualTo(expectedPrincipalName);
    assertThat(session.getAttributeNames().size()).isEqualTo(3);
    assertThat(session.getAttributeNames().containsAll(expectedAttributeNames)).isTrue();
    assertThat(String.valueOf(session.getAttribute("attrOne"))).isEqualTo("testOne");
    assertThat(String.valueOf(session.getAttribute("attrTwo"))).isEqualTo("testTwo");
    assertThat(String.valueOf(session.getAttribute(FindByIndexNameSessionRepository.PRINCIPAL_NAME_INDEX_NAME)))
            .isEqualTo(expectedPrincipalName);

    verify(mockDataInput, times(2)).readUTF();
    verify(mockDataInput, times(2)).readLong();
    verify(mockDataInput, times(2)).readInt();
}

---

From source file:com.mapr.hbase.support.objects.MHRegionInfo.java

@Override
public void readFields(DataInput in) throws IOException {
    // Read the single version byte.  We don't ask the super class do it
    // because freaks out if its not the current classes' version.  This method
    // can deserialize version 0 and version 1 of HRI.
    byte version = in.readByte();
    if (version == 0) {
        // This is the old HRI that carried an HTD.  Migrate it.  The below
        // was copied from the old 0.90 HRI readFields.
        this.endKey = Bytes.readByteArray(in);
        this.offLine = in.readBoolean();
        this.regionId = in.readLong();
        this.regionName = Bytes.readByteArray(in);
        this.regionNameStr = Bytes.toStringBinary(this.regionName);
        this.split = in.readBoolean();
        this.startKey = Bytes.readByteArray(in);
        try {//from  w w  w. ja v a2s . c  o  m
            tableDesc = new HTableDescriptor();
            tableDesc.readFields(in);
            this.tableName = tableDesc.getName();
        } catch (EOFException eofe) {
            throw new IOException("HTD not found in input buffer", eofe);
        }
        this.hashCode = in.readInt();
    } else if (getVersion() == version) {
        this.endKey = Bytes.readByteArray(in);
        this.offLine = in.readBoolean();
        this.regionId = in.readLong();
        this.regionName = Bytes.readByteArray(in);
        this.regionNameStr = Bytes.toStringBinary(this.regionName);
        this.split = in.readBoolean();
        this.startKey = Bytes.readByteArray(in);
        this.tableName = Bytes.readByteArray(in);
        this.hashCode = in.readInt();
    } else {
        throw new IOException("Non-migratable/unknown version=" + getVersion());
    }
}

---

From source file:bobs.is.compress.sevenzip.SevenZFile.java

private void readPackInfo(final DataInput header, final Archive archive) throws IOException {
    archive.packPos = readUint64(header);
    final long numPackStreams = readUint64(header);
    int nid = header.readUnsignedByte();
    if (nid == NID.kSize) {
        archive.packSizes = new long[(int) numPackStreams];
        for (int i = 0; i < archive.packSizes.length; i++) {
            archive.packSizes[i] = readUint64(header);
        }//from ww  w  .  j a v  a 2 s . co  m
        nid = header.readUnsignedByte();
    }

    if (nid == NID.kCRC) {
        archive.packCrcsDefined = readAllOrBits(header, (int) numPackStreams);
        archive.packCrcs = new long[(int) numPackStreams];
        for (int i = 0; i < (int) numPackStreams; i++) {
            if (archive.packCrcsDefined.get(i)) {
                archive.packCrcs[i] = 0xffffFFFFL & Integer.reverseBytes(header.readInt());
            }
        }

        nid = header.readUnsignedByte();
    }

    if (nid != NID.kEnd) {
        throw new IOException("Badly terminated PackInfo (" + nid + ")");
    }
}

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