com.icl.saxon.om

## Class DocumentPool

- java.lang.Object
- - com.icl.saxon.om.DocumentPool

-     public final class DocumentPool
      extends java.lang.Object

  An object representing the collection of documents handled during a single transformation

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `DocumentPool()`

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `int` | `add(DocumentInfo doc, java.lang.String name)` Add a document to the pool, and allocate a document number
    `DocumentInfo` | `find(java.lang.String name)` Get the document with a given name
    `int` | `getDocumentNumber(DocumentInfo doc)` Get the document number of a document that is already in the pool.
    `int` | `getNumberOfDocuments()` Get the number of documents in the pool

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

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

- - ### Constructor Detail

    - #### DocumentPool

          public DocumentPool()

  - ### Method Detail

    - #### add

          public int add(DocumentInfo doc,
                java.lang.String name)

      Add a document to the pool, and allocate a document number
      Parameters:
        `doc` - The DocumentInfo for the document in question
        `name` - The name of the document. May be null, in the case of the principal source document or a result tree fragment. Used for the URI of a document loaded using the document() function.
      Returns:
        the document number, unique within this document pool

    - #### getDocumentNumber

          public int getDocumentNumber(DocumentInfo doc)

      Get the document number of a document that is already in the pool. If the document is not already in the pool, it is added, and a document number is allocated. (This can happen when a Java application has built the document independently of the Controller. In this case, it is still necessary that all documents use the same NamePool, but we don't actually check this).
      Returns:
        the document number

    - #### find

          public DocumentInfo find(java.lang.String name)

      Get the document with a given name
      Returns:
        the DocumentInfo with the given name if it exists, or null if it is not found.

    - #### getNumberOfDocuments

          public int getNumberOfDocuments()

      Get the number of documents in the pool