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## 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
`DocumentPool()`

Method Summary
`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

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