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## org.modeshape.jcr.query.lucene
Class CompareLengthQuery

    java.lang.Object
      org.apache.lucene.search.Query
          org.modeshape.jcr.query.lucene.CompareQuery<Long>
              org.modeshape.jcr.query.lucene.CompareLengthQuery

All Implemented Interfaces:
  Serializable, Cloneable

    public class CompareLengthQuery

extends CompareQuery<Long>

A Lucene `Query` implementation that is used to apply a `Length` constraint against a string field. This query implementation works by using the weight and `scorer` of the wrapped query to score (and return) only those documents with string fields that satisfy the constraint.

See Also:
  Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.modeshape.jcr.query.lucene.CompareQuery
`CompareQuery.CompareScorer, CompareQuery.CompareWeight, CompareQuery.Evaluator<ValueType>`

Field Summary
`protected static CompareQuery.Evaluator<Long>` | `EQUAL_TO`
`protected static CompareQuery.Evaluator<Long>` | `IS_GREATER_THAN`
`protected static CompareQuery.Evaluator<Long>` | `IS_GREATER_THAN_OR_EQUAL_TO`
`protected static CompareQuery.Evaluator<Long>` | `IS_LESS_THAN`
`protected static CompareQuery.Evaluator<Long>` | `IS_LESS_THAN_OR_EQUAL_TO`
`protected static CompareQuery.Evaluator<Long>` | `NOT_EQUAL_TO`

Fields inherited from class org.modeshape.jcr.query.lucene.CompareQuery
`constraintValue, evaluator, fieldName, fieldSelector, stringFactory, valueTypeFactory`

Constructor Summary
`protected` | `CompareLengthQuery(String fieldName, Long constraintValue, ValueFactory<String> stringFactory, CompareQuery.Evaluator<Long> evaluator)` Construct a `Query` implementation that scores nodes according to the supplied comparator.

Method Summary
`Object` | `clone()`
`static CompareLengthQuery` | `createQueryForNodesWithFieldEqualTo(Long constraintValue, String fieldName, ValueFactories factories)` Construct a `Query` implementation that scores documents with a field length that is equal to the supplied constraint value.
`static CompareLengthQuery` | `createQueryForNodesWithFieldGreaterThan(Long constraintValue, String fieldName, ValueFactories factories)` Construct a `Query` implementation that scores documents with a field length that is greater than the supplied constraint value.
`static CompareLengthQuery` | `createQueryForNodesWithFieldGreaterThanOrEqualTo(Long constraintValue, String fieldName, ValueFactories factories)` Construct a `Query` implementation that scores documents with a field length that is greater than or equal to the supplied constraint value.
`static CompareLengthQuery` | `createQueryForNodesWithFieldLessThan(Long constraintValue, String fieldName, ValueFactories factories)` Construct a `Query` implementation that scores documents with a field length that is less than the supplied constraint value.
`static CompareLengthQuery` | `createQueryForNodesWithFieldLessThanOrEqualTo(Long constraintValue, String fieldName, ValueFactories factories)` Construct a `Query` implementation that scores documents with a field length that is less than or equal to the supplied constraint value.
`static CompareLengthQuery` | `createQueryForNodesWithFieldNotEqualTo(Long constraintValue, String fieldName, ValueFactories factories)` Construct a `Query` implementation that scores documents with a field length that is not equal to the supplied constraint value.
`protected Long` | `readFromDocument(org.apache.lucene.index.IndexReader reader, int docId)`

Methods inherited from class org.modeshape.jcr.query.lucene.CompareQuery
`createWeight, toString`

Methods inherited from class org.apache.lucene.search.Query
`combine, equals, extractTerms, getBoost, getSimilarity, hashCode, mergeBooleanQueries, rewrite, setBoost, toString, weight`

Methods inherited from class java.lang.Object
`finalize, getClass, notify, notifyAll, wait, wait, wait`

Field Detail

### EQUAL_TO

    protected static final CompareQuery.Evaluator<Long> EQUAL_TO

### NOT_EQUAL_TO

    protected static final CompareQuery.Evaluator<Long> NOT_EQUAL_TO

### IS_LESS_THAN

    protected static final CompareQuery.Evaluator<Long> IS_LESS_THAN

### IS_LESS_THAN_OR_EQUAL_TO

    protected static final CompareQuery.Evaluator<Long> IS_LESS_THAN_OR_EQUAL_TO

### IS_GREATER_THAN

    protected static final CompareQuery.Evaluator<Long> IS_GREATER_THAN

### IS_GREATER_THAN_OR_EQUAL_TO

    protected static final CompareQuery.Evaluator<Long> IS_GREATER_THAN_OR_EQUAL_TO

Constructor Detail

### CompareLengthQuery

    protected CompareLengthQuery(String fieldName,
                                 Long constraintValue,
                                 ValueFactory<String> stringFactory,
                                 CompareQuery.Evaluator<Long> evaluator)

  Construct a `Query` implementation that scores nodes according to the supplied comparator.

  Parameters:
    `fieldName` - the name of the document field containing the value; may not be null
    `constraintValue` - the constraint value; may not be null
    `stringFactory` - the string factory that can be used during the scoring; may not be null
    `evaluator` - the `CompareQuery.Evaluator` implementation that returns whether the node path satisfies the constraint; may not be null

Method Detail

### createQueryForNodesWithFieldEqualTo

    public static CompareLengthQuery createQueryForNodesWithFieldEqualTo(Long constraintValue,
                                                                         String fieldName,
                                                                         ValueFactories factories)

  Construct a `Query` implementation that scores documents with a field length that is equal to the supplied constraint value.

  Parameters:
    `constraintValue` - the constraint value; may not be null
    `fieldName` - the name of the document field containing the value; may not be null
    `factories` - the value factories that can be used during the scoring; may not be null
  Returns:
    the query; never null

### createQueryForNodesWithFieldNotEqualTo

    public static CompareLengthQuery createQueryForNodesWithFieldNotEqualTo(Long constraintValue,
                                                                            String fieldName,
                                                                            ValueFactories factories)

  Construct a `Query` implementation that scores documents with a field length that is not equal to the supplied constraint value.

  Parameters:
    `constraintValue` - the constraint value; may not be null
    `fieldName` - the name of the document field containing the value; may not be null
    `factories` - the value factories that can be used during the scoring; may not be null
  Returns:
    the query; never null

### createQueryForNodesWithFieldGreaterThan

    public static CompareLengthQuery createQueryForNodesWithFieldGreaterThan(Long constraintValue,
                                                                             String fieldName,
                                                                             ValueFactories factories)

  Construct a `Query` implementation that scores documents with a field length that is greater than the supplied constraint value.

  Parameters:
    `constraintValue` - the constraint value; may not be null
    `fieldName` - the name of the document field containing the value; may not be null
    `factories` - the value factories that can be used during the scoring; may not be null
  Returns:
    the query; never null

### createQueryForNodesWithFieldGreaterThanOrEqualTo

    public static CompareLengthQuery createQueryForNodesWithFieldGreaterThanOrEqualTo(Long constraintValue,
                                                                                      String fieldName,
                                                                                      ValueFactories factories)

  Construct a `Query` implementation that scores documents with a field length that is greater than or equal to the supplied constraint value.

  Parameters:
    `constraintValue` - the constraint value; may not be null
    `fieldName` - the name of the document field containing the value; may not be null
    `factories` - the value factories that can be used during the scoring; may not be null
  Returns:
    the query; never null

### createQueryForNodesWithFieldLessThan

    public static CompareLengthQuery createQueryForNodesWithFieldLessThan(Long constraintValue,
                                                                          String fieldName,
                                                                          ValueFactories factories)

  Construct a `Query` implementation that scores documents with a field length that is less than the supplied constraint value.

  Parameters:
    `constraintValue` - the constraint value; may not be null
    `fieldName` - the name of the document field containing the value; may not be null
    `factories` - the value factories that can be used during the scoring; may not be null
  Returns:
    the query; never null

### createQueryForNodesWithFieldLessThanOrEqualTo

    public static CompareLengthQuery createQueryForNodesWithFieldLessThanOrEqualTo(Long constraintValue,
                                                                                   String fieldName,
                                                                                   ValueFactories factories)

  Construct a `Query` implementation that scores documents with a field length that is less than or equal to the supplied constraint value.

  Parameters:
    `constraintValue` - the constraint value; may not be null
    `fieldName` - the name of the document field containing the value; may not be null
    `factories` - the value factories that can be used during the scoring; may not be null
  Returns:
    the query; never null

### readFromDocument

    protected Long readFromDocument(org.apache.lucene.index.IndexReader reader,
                                    int docId)
                             throws IOException

  Overrides:
    `readFromDocument` in class `CompareQuery<Long>`
  Throws:
    `IOException`

### clone

    public Object clone()

  Overrides:
    `clone` in class `org.apache.lucene.search.Query`

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