/*********************************************************************************************************************** * 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.runtime; import eu.stratosphere.api.common.typeutils.TypeComparator; import eu.stratosphere.api.common.typeutils.TypeComparatorFactory; import eu.stratosphere.configuration.Configuration; import eu.stratosphere.util.InstantiationUtil; public final class RuntimeComparatorFactory<T> implements TypeComparatorFactory<T>, java.io.Serializable { private static final long serialVersionUID = 1L; private static final String CONFIG_KEY = "SER_DATA"; private TypeComparator<T> comparator; public RuntimeComparatorFactory() {} public RuntimeComparatorFactory(TypeComparator<T> comparator) { this.comparator = comparator; } @Override public void writeParametersToConfig(Configuration config) { try { InstantiationUtil.writeObjectToConfig(comparator, config, CONFIG_KEY); } catch (Exception e) { throw new RuntimeException("Could not serialize comparator into the configuration.", e); } } @SuppressWarnings("unchecked") @Override public void readParametersFromConfig(Configuration config, ClassLoader cl) throws ClassNotFoundException { try { comparator = (TypeComparator<T>) InstantiationUtil.readObjectFromConfig(config, CONFIG_KEY, cl); } catch (ClassNotFoundException e) { throw e; } catch (Exception e) { throw new RuntimeException("Could not serialize serializer into the configuration.", e); } } @Override public TypeComparator<T> createComparator() { if (comparator != null) { return comparator; } else { throw new RuntimeException("ComparatorFactory has not been initialized from configuration."); } } }