/***********************************************************************************************************************
*
* Copyright (C) 2010-2013 by the Stratosphere project (http://stratosphere.eu)
*
* 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 eu.stratosphere.api.java.typeutils;
import eu.stratosphere.api.common.typeutils.TypeComparator;
import eu.stratosphere.api.common.typeutils.TypeSerializer;
import eu.stratosphere.api.java.typeutils.runtime.AvroSerializer;
import eu.stratosphere.api.java.typeutils.runtime.GenericTypeComparator;
import eu.stratosphere.types.TypeInformation;
/**
*
*/
public class GenericTypeInfo<T> extends TypeInformation<T> implements AtomicType<T> {
private final Class<T> typeClass;
public GenericTypeInfo(Class<T> typeClass) {
this.typeClass = typeClass;
}
@Override
public boolean isBasicType() {
return false;
}
@Override
public boolean isTupleType() {
return false;
}
@Override
public int getArity() {
return 1;
}
@Override
public Class<T> getTypeClass() {
return typeClass;
}
@Override
public boolean isKeyType() {
return Comparable.class.isAssignableFrom(typeClass);
}
@Override
public TypeSerializer<T> createSerializer() {
return new AvroSerializer<T>(this.typeClass);
}
@SuppressWarnings("unchecked")
@Override
public TypeComparator<T> createComparator(boolean sortOrderAscending) {
if (isKeyType()) {
@SuppressWarnings("rawtypes")
GenericTypeComparator comparator = new GenericTypeComparator(sortOrderAscending, createSerializer(), this.typeClass);
return (TypeComparator<T>) comparator;
}
throw new UnsupportedOperationException("Types that do not implement java.lang.Comparable cannot be used as keys.");
}
// --------------------------------------------------------------------------------------------
@Override
public int hashCode() {
return typeClass.hashCode() ^ 0x165667b1;
}
@Override
public boolean equals(Object obj) {
if (obj.getClass() == GenericTypeInfo.class) {
return typeClass == ((GenericTypeInfo<?>) obj).typeClass;
} else {
return false;
}
}
@Override
public String toString() {
return "GenericType<" + typeClass.getCanonicalName() + ">";
}
}