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Lucene example source code file (FieldSelectorResult.java)

This example Lucene source code file (FieldSelectorResult.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

fieldselectorresult, latent, lazy_load, lazy_load, load, load_and_break, load_and_break, no_load, no_load, size, size, size_and_break

The Lucene FieldSelectorResult.java source code

package org.apache.lucene.document;

/**
 * Copyright 2004 The Apache Software Foundation
 *
 * 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.
 */

/**
 *  Provides information about what should be done with this Field 
 *
 **/
public enum FieldSelectorResult {

    /**
     * Load this {@link Field} every time the {@link Document} is loaded, reading in the data as it is encountered.
     *  {@link Document#getField(String)} and {@link Document#getFieldable(String)} should not return null.
     *<p/>
     * {@link Document#add(Fieldable)} should be called by the Reader.
     */
  LOAD,

    /**
     * Lazily load this {@link Field}.  This means the {@link Field} is valid, but it may not actually contain its data until
     * invoked.  {@link Document#getField(String)} SHOULD NOT BE USED.  {@link Document#getFieldable(String)} is safe to use and should
     * return a valid instance of a {@link Fieldable}.
     *<p/>
     * {@link Document#add(Fieldable)} should be called by the Reader.
     */
  LAZY_LOAD,

    /**
     * Do not load the {@link Field}.  {@link Document#getField(String)} and {@link Document#getFieldable(String)} should return null.
     * {@link Document#add(Fieldable)} is not called.
     * <p/>
     * {@link Document#add(Fieldable)} should not be called by the Reader.
     */
  NO_LOAD,

    /**
     * Load this field as in the {@link #LOAD} case, but immediately return from {@link Field} loading for the {@link Document}.  Thus, the
     * Document may not have its complete set of Fields.  {@link Document#getField(String)} and {@link Document#getFieldable(String)} should
     * both be valid for this {@link Field}
     * <p/>
     * {@link Document#add(Fieldable)} should be called by the Reader.
     */
  LOAD_AND_BREAK,

    /** Expert:  Load the size of this {@link Field} rather than its value.
     * Size is measured as number of bytes required to store the field == bytes for a binary or any compressed value, and 2*chars for a String value.
     * The size is stored as a binary value, represented as an int in a byte[], with the higher order byte first in [0]
     */
  SIZE,

    /** Expert: Like {@link #SIZE} but immediately break from the field loading loop, i.e., stop loading further fields, after the size is loaded */         
  SIZE_AND_BREAK,

  /**
     * Lazily load this {@link Field}, but do not cache the result.  This means the {@link Field} is valid, but it may not actually contain its data until
     * invoked.  {@link Document#getField(String)} SHOULD NOT BE USED.  {@link Document#getFieldable(String)} is safe to use and should
     * return a valid instance of a {@link Fieldable}.
     *<p/>
     * {@link Document#add(Fieldable)} should be called by the Reader.
     */
  LATENT
}

Other Lucene examples (source code examples)

Here is a short list of links related to this Lucene FieldSelectorResult.java source code file:



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