tigase.jaxmpp.core.client.criteria

## Class ElementCriteria

- java.lang.Object
- - tigase.jaxmpp.core.client.criteria.ElementCriteria

- All Implemented Interfaces:
    Criteria

      public class ElementCriteria
      extends Object
      implements Criteria

  Simple implementation of Criteria to check element name and its attributes..

- - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `protected HashMap<String,String>` | `attrs`
    `protected String` | `name`
    `protected Criteria` | `nextCriteria`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `ElementCriteria(String name, String[] attname, String[] attValue)` Construct criteria.

  - ### Method Summary

    All Methods Static Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `Criteria` | `add(Criteria criteria)` Adds restriction for deeper level of elements.
    `static ElementCriteria` | `empty()` Makes criteria object what accepts all elements.
    `boolean` | `match(Element element)` This method checks if element match to conditions.
    `static ElementCriteria` | `name(String name)` Makes criteria object to check name of element.
    `static ElementCriteria` | `name(String name, String xmlns)` Makes criteria object to check name of element and its namespace.
    `static ElementCriteria` | `name(String name, String[] attNames, String[] attValues)`
    `static ElementCriteria` | `xmlns(String xmlns)` Makes criteria checking only xmlns attribute.

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

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

- - ### Field Detail

    - #### attrs

          protected HashMap<String,String> attrs

    - #### name

          protected String name

    - #### nextCriteria

          protected Criteria nextCriteria

  - ### Constructor Detail

    - #### ElementCriteria

          public ElementCriteria(String name,
                                 String[] attname,
                                 String[] attValue)

      Construct criteria.
      Parameters:
        `name` - name of element. If `null` then any elements name will be accepted;
        `attname` - names of required attributes
        `attValue` - value of requird attrivutes

  - ### Method Detail

    - #### empty

          public static final ElementCriteria empty()

      Makes criteria object what accepts all elements.
      Returns:
        criteria

    - #### name

          public static final ElementCriteria name(String name)

      Makes criteria object to check name of element.
      Parameters:
        `name` - expected element name.
      Returns:
        criteria

    - #### name

          public static final ElementCriteria name(String name,
                                                   String xmlns)

      Makes criteria object to check name of element and its namespace.
      Parameters:
        `name` - expected name of element.
        `xmlns` - expected xmlns
      Returns:
        criteria

    - #### name

          public static final ElementCriteria name(String name,
                                                   String[] attNames,
                                                   String[] attValues)

    - #### xmlns

          public static final ElementCriteria xmlns(String xmlns)

      Makes criteria checking only xmlns attribute.
      Parameters:
        `xmlns` - expected xmlns
      Returns:
        criteria

    - #### add

          public Criteria add(Criteria criteria)

      Adds restriction for deeper level of elements.

      For example:
      If you have structure of elements: `<A><B></B></A>`
      then, to check elements `A` and `B` you should use construction like this: `critToCheckA.add(critToCheckB);`

      Specified by:
        `add` in interface `Criteria`
      Parameters:
        `criteria` - restriction to add
      Returns:

    - #### match

          public boolean match(Element element)
                        throws XMLException

      This method checks if element match to conditions.
      Specified by:
        `match` in interface `Criteria`
      Parameters:
        `element` - element to check
      Returns:
        `true` if element match.
      Throws:
        `XMLException`

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