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## org.apache.muse.ws.resource.properties.query
Interface QueryExpression

All Known Implementing Classes:
  XPathQueryExpression

public interface QueryExpression

QueryExpression describes components that can evaluate an XML document based on a specific query language. An example of such a query language is XPath 1.0. Evaluation of a query expression on an XML document should result in a set of DOM Nodes no matter what language is used.

Author:
  Dan Jemiolo (danj)

Method Summary
`org.w3c.dom.Node[]` | `evaluate(org.w3c.dom.Element wsrpDoc, java.lang.String query)`
`java.lang.String` | `getDialect()`

Method Detail

### getDialect

    public java.lang.String getDialect()

  Returns:
    The URI that defines the query language for this expression.

### evaluate

    public org.w3c.dom.Node[] evaluate(org.w3c.dom.Element wsrpDoc,
                                       java.lang.String query)
                                throws InvalidQueryExpressionFault,
                                       QueryEvaluationErrorFault

  Parameters:
    `wsrpDoc` - A resource's WSRP document.
    `query` - A query expression in the language described by getDialect().
  Returns:
    An array of nodes from the given document that match the query expression. The array may be empty.
  Throws:
    `InvalidQueryExpressionFault`
    `QueryEvaluationErrorFault`

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