org.apache.lucene.queryparser.flexible.standard.nodes

## Class RegexpQueryNode

- java.lang.Object
- - org.apache.lucene.queryparser.flexible.core.nodes.QueryNodeImpl
  - - org.apache.lucene.queryparser.flexible.standard.nodes.RegexpQueryNode

- All Implemented Interfaces:
    Cloneable, FieldableNode, QueryNode, TextableQueryNode

      public class RegexpQueryNode
      extends QueryNodeImpl
      implements TextableQueryNode, FieldableNode

  A `RegexpQueryNode` represents `RegexpQuery` query Examples: /[a-z]|[0-9]/

- - ### Field Summary

    - ### Fields inherited from class org.apache.lucene.queryparser.flexible.core.nodes.QueryNodeImpl

      `PLAINTEXT_FIELD_NAME, toQueryStringIgnoreFields`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `RegexpQueryNode(CharSequence field, CharSequence text, int begin, int end)`

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `RegexpQueryNode` | `cloneTree()` Recursive clone the QueryNode tree The tags are not copied to the new tree when you call the cloneTree() method
    `CharSequence` | `getField()` Returns the field associated to the node and every node under it.
    `String` | `getFieldAsString()`
    `CharSequence` | `getText()`
    `void` | `setField(CharSequence field)` Associates the node to a field.
    `void` | `setText(CharSequence text)`
    `BytesRef` | `textToBytesRef()`
    `CharSequence` | `toQueryString(EscapeQuerySyntax escapeSyntaxParser)` convert to a query string understood by the query parser
    `String` | `toString()` Every implementation of this class should return pseudo xml like this: For FieldQueryNode: <field start='1' end='2' field='subject' text='foo'/>

    - ### Methods inherited from class org.apache.lucene.queryparser.flexible.core.nodes.QueryNodeImpl

      `add, add, allocate, clone, containsTag, getChildren, getParent, getTag, getTagMap, isDefaultField, isLeaf, isRoot, removeChildren, removeFromParent, set, setLeaf, setTag, unsetTag`

    - ### Methods inherited from class java.lang.Object

      `equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

    - ### Methods inherited from interface org.apache.lucene.queryparser.flexible.core.nodes.QueryNode

      `add, add, containsTag, getChildren, getParent, getTag, getTagMap, isLeaf, removeChildren, removeFromParent, set, setTag, unsetTag`

- - ### Constructor Detail

    - #### RegexpQueryNode

          public RegexpQueryNode(CharSequence field,
                                 CharSequence text,
                                 int begin,
                                 int end)

      Parameters:
        `field` - - field name
        `text` - - value that contains a regular expression
        `begin` - - position in the query string
        `end` - - position in the query string

  - ### Method Detail

    - #### textToBytesRef

          public BytesRef textToBytesRef()

    - #### toString

          public String toString()

      Description copied from class: `QueryNodeImpl`
      Every implementation of this class should return pseudo xml like this: For FieldQueryNode: <field start='1' end='2' field='subject' text='foo'/>
      Specified by:
        `toString` in interface `QueryNode`
      Overrides:
        `toString` in class `QueryNodeImpl`
      See Also:
        `QueryNode.toString()`

    - #### cloneTree

          public RegexpQueryNode cloneTree()
                                    throws CloneNotSupportedException

      Description copied from interface: `QueryNode`
      Recursive clone the QueryNode tree The tags are not copied to the new tree when you call the cloneTree() method
      Specified by:
        `cloneTree` in interface `QueryNode`
      Overrides:
        `cloneTree` in class `QueryNodeImpl`
      Returns:
        the cloned tree
      Throws:
        `CloneNotSupportedException`

    - #### getText

          public CharSequence getText()

      Specified by:
        `getText` in interface `TextableQueryNode`

    - #### setText

          public void setText(CharSequence text)

      Specified by:
        `setText` in interface `TextableQueryNode`

    - #### getField

          public CharSequence getField()

      Description copied from interface: `FieldableNode`
      Returns the field associated to the node and every node under it.
      Specified by:
        `getField` in interface `FieldableNode`
      Returns:
        the field name

    - #### getFieldAsString

          public String getFieldAsString()

    - #### setField

          public void setField(CharSequence field)

      Description copied from interface: `FieldableNode`
      Associates the node to a field.
      Specified by:
        `setField` in interface `FieldableNode`
      Parameters:
        `field` - the field name

    - #### toQueryString

          public CharSequence toQueryString(EscapeQuerySyntax escapeSyntaxParser)

      Description copied from interface: `QueryNode`
      convert to a query string understood by the query parser
      Specified by:
        `toQueryString` in interface `QueryNode`

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