com.datastax.driver.core.ArrayBackedRow Maven / Gradle / Ivy
/*
* Copyright (C) 2012 DataStax Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.datastax.driver.core;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.net.InetAddress;
import java.nio.ByteBuffer;
import java.util.*;
import com.datastax.driver.core.exceptions.InvalidTypeException;
/**
* Implementation of a Row backed by an ArrayList.
*/
class ArrayBackedRow implements Row {
private final ColumnDefinitions metadata;
private final List data;
private ArrayBackedRow(ColumnDefinitions metadata, List data) {
this.metadata = metadata;
this.data = data;
}
static Row fromData(ColumnDefinitions metadata, List data) {
if (data == null)
return null;
return new ArrayBackedRow(metadata, data);
}
public ColumnDefinitions getColumnDefinitions() {
return metadata;
}
public boolean isNull(int i) {
metadata.checkBounds(i);
return data.get(i) == null;
}
public boolean isNull(String name) {
return isNull(metadata.getFirstIdx(name));
}
public boolean getBool(int i) {
metadata.checkType(i, DataType.Name.BOOLEAN);
ByteBuffer value = data.get(i);
if (value == null || value.remaining() == 0)
return false;
return TypeCodec.BooleanCodec.instance.deserializeNoBoxing(value);
}
public boolean getBool(String name) {
return getBool(metadata.getFirstIdx(name));
}
public int getInt(int i) {
metadata.checkType(i, DataType.Name.INT);
ByteBuffer value = data.get(i);
if (value == null || value.remaining() == 0)
return 0;
return TypeCodec.IntCodec.instance.deserializeNoBoxing(value);
}
public int getInt(String name) {
return getInt(metadata.getFirstIdx(name));
}
public long getLong(int i) {
metadata.checkType(i, DataType.Name.BIGINT, DataType.Name.COUNTER);
ByteBuffer value = data.get(i);
if (value == null || value.remaining() == 0)
return 0L;
return TypeCodec.LongCodec.instance.deserializeNoBoxing(value);
}
public long getLong(String name) {
return getLong(metadata.getFirstIdx(name));
}
public Date getDate(int i) {
metadata.checkType(i, DataType.Name.TIMESTAMP);
ByteBuffer value = data.get(i);
if (value == null || value.remaining() == 0)
return null;
return TypeCodec.DateCodec.instance.deserialize(value);
}
public Date getDate(String name) {
return getDate(metadata.getFirstIdx(name));
}
public float getFloat(int i) {
metadata.checkType(i, DataType.Name.FLOAT);
ByteBuffer value = data.get(i);
if (value == null || value.remaining() == 0)
return 0.0f;
return TypeCodec.FloatCodec.instance.deserializeNoBoxing(value);
}
public float getFloat(String name) {
return getFloat(metadata.getFirstIdx(name));
}
public double getDouble(int i) {
metadata.checkType(i, DataType.Name.DOUBLE);
ByteBuffer value = data.get(i);
if (value == null || value.remaining() == 0)
return 0.0;
return TypeCodec.DoubleCodec.instance.deserializeNoBoxing(value);
}
public double getDouble(String name) {
return getDouble(metadata.getFirstIdx(name));
}
public ByteBuffer getBytesUnsafe(int i) {
metadata.checkBounds(i);
ByteBuffer value = data.get(i);
if (value == null)
return null;
return value.duplicate();
}
public ByteBuffer getBytesUnsafe(String name) {
return getBytesUnsafe(metadata.getFirstIdx(name));
}
public ByteBuffer getBytes(int i) {
metadata.checkType(i, DataType.Name.BLOB);
return getBytesUnsafe(i);
}
public ByteBuffer getBytes(String name) {
return getBytes(metadata.getFirstIdx(name));
}
public String getString(int i) {
DataType.Name type = metadata.checkType(i, DataType.Name.VARCHAR,
DataType.Name.TEXT,
DataType.Name.ASCII);
ByteBuffer value = data.get(i);
if (value == null)
return null;
return type == DataType.Name.ASCII
? TypeCodec.StringCodec.asciiInstance.deserialize(value)
: TypeCodec.StringCodec.utf8Instance.deserialize(value);
}
public String getString(String name) {
return getString(metadata.getFirstIdx(name));
}
public BigInteger getVarint(int i) {
metadata.checkType(i, DataType.Name.VARINT);
ByteBuffer value = data.get(i);
if (value == null || value.remaining() == 0)
return null;
return TypeCodec.BigIntegerCodec.instance.deserialize(value);
}
public BigInteger getVarint(String name) {
return getVarint(metadata.getFirstIdx(name));
}
public BigDecimal getDecimal(int i) {
metadata.checkType(i, DataType.Name.DECIMAL);
ByteBuffer value = data.get(i);
if (value == null || value.remaining() == 0)
return null;
return TypeCodec.DecimalCodec.instance.deserialize(value);
}
public BigDecimal getDecimal(String name) {
return getDecimal(metadata.getFirstIdx(name));
}
public UUID getUUID(int i) {
DataType.Name type = metadata.checkType(i, DataType.Name.UUID, DataType.Name.TIMEUUID);
ByteBuffer value = data.get(i);
if (value == null || value.remaining() == 0)
return null;
return type == DataType.Name.UUID
? TypeCodec.UUIDCodec.instance.deserialize(value)
: TypeCodec.TimeUUIDCodec.instance.deserialize(value);
}
public UUID getUUID(String name) {
return getUUID(metadata.getFirstIdx(name));
}
public InetAddress getInet(int i) {
metadata.checkType(i, DataType.Name.INET);
ByteBuffer value = data.get(i);
if (value == null || value.remaining() == 0)
return null;
return TypeCodec.InetCodec.instance.deserialize(value);
}
public InetAddress getInet(String name) {
return getInet(metadata.getFirstIdx(name));
}
@SuppressWarnings("unchecked")
public List getList(int i, Class elementsClass) {
DataType type = metadata.getType(i);
if (type.getName() != DataType.Name.LIST)
throw new InvalidTypeException(String.format("Column %s is not of list type", metadata.getName(i)));
Class expectedClass = type.getTypeArguments().get(0).getName().javaType;
if (!elementsClass.isAssignableFrom(expectedClass))
throw new InvalidTypeException(String.format("Column %s is a list of %s (CQL type %s), cannot be retrieve as a list of %s", metadata.getName(i), expectedClass, type, elementsClass));
ByteBuffer value = data.get(i);
if (value == null)
return Collections.emptyList();
return Collections.unmodifiableList((List)type.codec().deserialize(value));
}
public List getList(String name, Class elementsClass) {
return getList(metadata.getFirstIdx(name), elementsClass);
}
@SuppressWarnings("unchecked")
public Set getSet(int i, Class elementsClass) {
DataType type = metadata.getType(i);
if (type.getName() != DataType.Name.SET)
throw new InvalidTypeException(String.format("Column %s is not of set type", metadata.getName(i)));
Class expectedClass = type.getTypeArguments().get(0).getName().javaType;
if (!elementsClass.isAssignableFrom(expectedClass))
throw new InvalidTypeException(String.format("Column %s is a set of %s (CQL type %s), cannot be retrieve as a set of %s", metadata.getName(i), expectedClass, type, elementsClass));
ByteBuffer value = data.get(i);
if (value == null)
return Collections.emptySet();
return Collections.unmodifiableSet((Set)type.codec().deserialize(value));
}
public Set getSet(String name, Class elementsClass) {
return getSet(metadata.getFirstIdx(name), elementsClass);
}
@SuppressWarnings("unchecked")
public Map getMap(int i, Class keysClass, Class valuesClass) {
DataType type = metadata.getType(i);
if (type.getName() != DataType.Name.MAP)
throw new InvalidTypeException(String.format("Column %s is not of map type", metadata.getName(i)));
Class expectedKeysClass = type.getTypeArguments().get(0).getName().javaType;
Class expectedValuesClass = type.getTypeArguments().get(1).getName().javaType;
if (!keysClass.isAssignableFrom(expectedKeysClass) || !valuesClass.isAssignableFrom(expectedValuesClass))
throw new InvalidTypeException(String.format("Column %s is a map of %s->%s (CQL type %s), cannot be retrieve as a map of %s->%s", metadata.getName(i), expectedKeysClass, expectedValuesClass, type, keysClass, valuesClass));
ByteBuffer value = data.get(i);
if (value == null)
return Collections.emptyMap();
return Collections.unmodifiableMap((Map)type.codec().deserialize(value));
}
public Map getMap(String name, Class keysClass, Class valuesClass) {
return getMap(metadata.getFirstIdx(name), keysClass, valuesClass);
}
@Override
public String toString() {
StringBuilder sb = new StringBuilder();
sb.append("Row[");
for (int i = 0; i < metadata.size(); i++) {
if (i != 0)
sb.append(", ");
ByteBuffer bb = data.get(i);
if (bb == null)
sb.append("NULL");
else
sb.append(metadata.getType(i).codec().deserialize(bb).toString());
}
sb.append(']');
return sb.toString();
}
}
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