Lucene example source code file (JustCompileSearchSpans.java)

This example Lucene source code file (JustCompileSearchSpans.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Lucene tags/keywords

docvalues, docvalues, indexreader, io, ioexception, justcompiledocvalues, justcompilefieldcachesource, override, override, string, string, unsupported_msg, unsupportedoperationexception, unsupportedoperationexception, valuesource

The Lucene JustCompileSearchSpans.java source code

package org.apache.lucene.search.function;

/**
 * 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.
 */

import org.apache.lucene.index.IndexReader;
import org.apache.lucene.search.FieldCache;

import java.io.IOException;

/**
 * Holds all implementations of classes in the o.a.l.s.function package as a
 * back-compatibility test. It does not run any tests per-se, however if
 * someone adds a method to an interface or abstract method to an abstract
 * class, one of the implementations here will fail to compile and so we know
 * back-compat policy was violated.
 */
final class JustCompileSearchFunction {

  private static final String UNSUPPORTED_MSG = "unsupported: used for back-compat testing only !";

  static final class JustCompileDocValues extends DocValues {
    @Override
    public float floatVal(int doc) {
      throw new UnsupportedOperationException(UNSUPPORTED_MSG);
    }

    @Override
    public String toString(int doc) {
      throw new UnsupportedOperationException(UNSUPPORTED_MSG);
    }

  }

  static final class JustCompileFieldCacheSource extends FieldCacheSource {

    public JustCompileFieldCacheSource(String field) {
      super(field);
    }

    @Override
    public boolean cachedFieldSourceEquals(FieldCacheSource other) {
      throw new UnsupportedOperationException(UNSUPPORTED_MSG);
    }

    @Override
    public int cachedFieldSourceHashCode() {
      throw new UnsupportedOperationException(UNSUPPORTED_MSG);
    }

    @Override
    public DocValues getCachedFieldValues(FieldCache cache, String field,
                                          IndexReader reader) throws IOException {
      throw new UnsupportedOperationException(UNSUPPORTED_MSG);
    }

  }

  static final class JustCompileValueSource extends ValueSource {
    @Override
    public String description() {
      throw new UnsupportedOperationException(UNSUPPORTED_MSG);
    }

    @Override
    public boolean equals(Object o) {
      throw new UnsupportedOperationException(UNSUPPORTED_MSG);
    }

    @Override
    public DocValues getValues(IndexReader reader) throws IOException {
      throw new UnsupportedOperationException(UNSUPPORTED_MSG);
    }

    @Override
    public int hashCode() {
      throw new UnsupportedOperationException(UNSUPPORTED_MSG);
    }

  }

}