/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.metamodel.hbase;
import java.math.BigDecimal;
import org.apache.hadoop.hbase.util.Bytes;
import org.apache.metamodel.MetaModelException;
/**
* Util class for Converting Object values to Bytes
*
*/
public class ByteUtils {
public static byte[] toBytes(Object o) {
if (o != null) {
return toBytes(o, o.getClass());
}
return null;
}
public static byte[] toBytes(Object value, Class<?> klass) {
if (klass.isAssignableFrom(String.class)) {
return Bytes.toBytes(value.toString());
} else if (klass.equals(int.class)
|| klass.isAssignableFrom(Integer.class)) {
return Bytes.toBytes(value instanceof Integer ? (Integer) value
: new Integer(value.toString()));
} else if (klass.equals(long.class)
|| klass.isAssignableFrom(Long.class)) {
return Bytes.toBytes(value instanceof Long ? (Long) value
: new Long(value.toString()));
} else if (klass.equals(boolean.class)
|| klass.isAssignableFrom(Boolean.class)) {
return Bytes.toBytes(value instanceof Boolean ? (Boolean) value
: new Boolean(value.toString()));
} else if (klass.equals(double.class)
|| klass.isAssignableFrom(Double.class)) {
return Bytes.toBytes(value instanceof Double ? (Double) value
: new Double(value.toString()));
} else if (klass.equals(float.class)
|| klass.isAssignableFrom(Float.class)) {
return Bytes.toBytes(value instanceof Float ? (Float) value
: new Float(value.toString()));
} else if (klass.equals(short.class)
|| klass.isAssignableFrom(Short.class)) {
return Bytes.toBytes(value instanceof Short ? (Short) value
: new Short(value.toString()));
} else if (klass.equals(BigDecimal.class)) {
return Bytes
.toBytes(value instanceof BigDecimal ? (BigDecimal) value
: new BigDecimal(value.toString()));
} else {
throw new MetaModelException(
"Could not find a suitable Type to assign value for give type "
+ klass.getName());
}
}
/**
* Builds Object from Bytes Picked from Hbase.
*
* @param b
* @param klass
* @return
*/
public static Object toObject(byte[] b, Class<?> klass) {
if (klass.isAssignableFrom(String.class)) {
return Bytes.toString(b);
} else if (klass.equals(int.class)
|| klass.isAssignableFrom(Integer.class)) {
return Bytes.toInt(b);
} else if (klass.equals(long.class)
|| klass.isAssignableFrom(Long.class)) {
return Bytes.toLong(b);
} else if (klass.equals(boolean.class)
|| klass.isAssignableFrom(Boolean.class)) {
return Bytes.toBoolean(b);
} else if (klass.equals(double.class)
|| klass.isAssignableFrom(Double.class)) {
return Bytes.toDouble(b);
} else if (klass.equals(float.class)
|| klass.isAssignableFrom(Float.class)) {
return Bytes.toFloat(b);
} else if (klass.equals(short.class)
|| klass.isAssignableFrom(Short.class)) {
return Bytes.toShort(b);
} else if (klass.equals(BigDecimal.class)) {
return Bytes.toBigDecimal(b);
} else {
throw new MetaModelException("Could Not find a suitable Type for "
+ klass.getName());
}
}
}