org.kitesdk.morphline.base.FieldExpression Maven / Gradle / Ivy
/*
* Copyright 2013 Cloudera 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 org.kitesdk.morphline.base;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import org.kitesdk.morphline.api.Record;
import com.google.common.base.Preconditions;
import com.google.common.collect.Lists;
import com.typesafe.config.Config;
/**
* Helper to fetch the values of a field of a {@link Record} referred to by a field expression,
* which is a String of the form @{fieldname}
.
*/
public final class FieldExpression {
private final List