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package com.sun.xml.ws.streaming;

import javax.xml.namespace.QName;

/**
 *  The Attributes interface is essentially a version of the
 * org.xml.sax.Attributes interface modified to use the JAX-WS QName class.
 *
 *  Although namespace declarations can appear in the attribute list, the
 * actual values of the local name and URI properties are
 * implementation-specific. 
 *
 *  Applications that need to iterate through all the attributes can use the
 * {@link #isNamespaceDeclaration} method to identify namespace declarations
 * and skip them. 
 *
 *  Also, the URI property of an attribute will never be null. The value
 * "" (empty string) is used for the URI of non-qualified attributes. 
 *
 * @author WS Development Team
 */
public interface Attributes {

    /**
     * Return the number of attributes in the list.
     *
     */
    public int getLength();

    /**
     * Return true if the attribute at the given index is a namespace
     * declaration.
     *
     *  Implementations are encouraged to optimize this method by taking into
     * account their internal representations of attributes. 
     *
     */
    public boolean isNamespaceDeclaration(int index);

    /**
     * Look up an attribute's QName by index.
     *
     */
    public QName getName(int index);

    /**
     * Look up an attribute's URI by index.
     *
     */
    public String getURI(int index);

    /**
     * Look up an attribute's local name by index.
     * If attribute is a namespace declaration, result
     * is expected including "xmlns:".
     */
    public String getLocalName(int index);

    /**
     * Look up an attribute's prefix by index.
     *
     */
    public String getPrefix(int index);

    /**
     * Look up an attribute's value by index.
     *
     */
    public String getValue(int index);

    /**
     * Look up the index of an attribute by QName.
     *
     */
    public int getIndex(QName name);

    /**
     * Look up the index of an attribute by URI and local name.
     *
     */
    public int getIndex(String uri, String localName);

    /**
     * Look up the index of an attribute by local name.
     *
     */
    public int getIndex(String localName);

    /**
     * Look up the value of an attribute by QName.
     *
     */
    public String getValue(QName name);

    /**
     * Look up the value of an attribute by URI and local name.
     *
     */
    public String getValue(String uri, String localName);

    /**
     * Look up the value of an attribute by local name.
     *
     */
    public String getValue(String localName);
}