com.leacox.motif.extract.DecomposableMatchBuilder Maven / Gradle / Ivy

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/*
 * Copyright (C) 2015 John Leacox
 *
 * 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 com.leacox.motif.extract;

import com.leacox.motif.extract.matchers.Matcher;

import java.util.List;
import java.util.Map;
import java.util.TreeMap;

/**
 * Abstract base class for all DecomposableMatchBuilder classes.
 *
 * @author John Leacox
 */
public abstract class DecomposableMatchBuilder {
  final List> fieldMatchers;
  final FieldExtractor fieldExtractor;

  DecomposableMatchBuilder(List> fieldMatchers, FieldExtractor fieldExtractor) {
    this.fieldMatchers = fieldMatchers;
    this.fieldExtractor = fieldExtractor;
  }

  protected TreeMap>> getChildMatchersByIndex(
      Map nestedBuildersByIndex) {
    TreeMap>> childMatchersByIndex = new TreeMap<>();
    for (Map.Entry entry : nestedBuildersByIndex.entrySet()) {
      childMatchersByIndex.put(entry.getKey(), entry.getValue().fieldMatchers);
    }

    return childMatchersByIndex;
  }

  protected List> getChildMatchers(
      Map nestedBuildersByIndex) {
    TreeMap>> childMatchersByIndex =
        getChildMatchersByIndex(nestedBuildersByIndex);

    return NestedMatchers.buildNestedMatchers(this.fieldMatchers, childMatchersByIndex);
  }

  protected TreeMap getChildExtractorsByIndex(
      Map nestedBuildersByIndex) {
    TreeMap childExtractorsByIndex = new TreeMap<>();
    for (Map.Entry entry : nestedBuildersByIndex.entrySet()) {
      childExtractorsByIndex.put(entry.getKey(), entry.getValue().fieldExtractor);
    }

    return childExtractorsByIndex;
  }

  protected NestedFieldExtractor getNestedFieldExtractor(
      Map buildersByIndex) {
    return new NestedFieldExtractor<>(fieldExtractor, getChildExtractorsByIndex(buildersByIndex));
  }
}