/*
* Copyright © 2014 Cask Data, 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 co.cask.cdap.api.dataset.table;
import java.util.Collections;
import java.util.Map;
import javax.annotation.Nullable;
/**
* Represents an empty row (a row with no columns).
*/
public class EmptyRow implements Row {
private final byte[] row;
private static final Map<byte[], byte[]> EMPTY_COLUMNS = Collections.emptyMap();
private EmptyRow(byte[] row) {
this.row = row;
}
public static Row of(byte[] row) {
return new EmptyRow(row);
}
@Override
public byte[] getRow() {
return row;
}
@Override
public Map<byte[], byte[]> getColumns() {
return EMPTY_COLUMNS;
}
@Override
public boolean isEmpty() {
return true;
}
@Nullable
@Override
public byte[] get(byte[] column) {
return null;
}
@Nullable
@Override
public String getString(byte[] column) {
return null;
}
@Nullable
@Override
public Boolean getBoolean(byte[] column) {
return null;
}
@Nullable
@Override
public Short getShort(byte[] column) {
return null;
}
@Nullable
@Override
public Integer getInt(byte[] column) {
return null;
}
@Nullable
@Override
public Long getLong(byte[] column) {
return null;
}
@Nullable
@Override
public Float getFloat(byte[] column) {
return null;
}
@Nullable
@Override
public Double getDouble(byte[] column) {
return null;
}
@Override
public boolean getBoolean(byte[] column, boolean defaultValue) {
return defaultValue;
}
@Override
public short getShort(byte[] column, short defaultValue) {
return defaultValue;
}
@Override
public int getInt(byte[] column, int defaultValue) {
return defaultValue;
}
@Override
public long getLong(byte[] column, long defaultValue) {
return defaultValue;
}
@Override
public float getFloat(byte[] column, float defaultValue) {
return defaultValue;
}
@Override
public double getDouble(byte[] column, double defaultValue) {
return defaultValue;
}
@Nullable
@Override
public byte[] get(String column) {
return null;
}
@Nullable
@Override
public String getString(String column) {
return null;
}
@Nullable
@Override
public Boolean getBoolean(String column) {
return null;
}
@Nullable
@Override
public Short getShort(String column) {
return null;
}
@Nullable
@Override
public Integer getInt(String column) {
return null;
}
@Nullable
@Override
public Long getLong(String column) {
return null;
}
@Nullable
@Override
public Float getFloat(String column) {
return null;
}
@Nullable
@Override
public Double getDouble(String column) {
return null;
}
@Override
public boolean getBoolean(String column, boolean defaultValue) {
return defaultValue;
}
@Override
public short getShort(String column, short defaultValue) {
return defaultValue;
}
@Override
public int getInt(String column, int defaultValue) {
return defaultValue;
}
@Override
public long getLong(String column, long defaultValue) {
return defaultValue;
}
@Override
public float getFloat(String column, float defaultValue) {
return defaultValue;
}
@Override
public double getDouble(String column, double defaultValue) {
return defaultValue;
}
}