import com.sun.org.apache.xpath.internal.res.XPATHMessages; //导入依赖的package包/类
/**
     * Returns the <code>index</code>th item in the snapshot collection. If
     * <code>index</code> is greater than or equal to the number of nodes in
     * the list, this method returns <code>null</code>. Unlike the iterator
     * result, the snapshot does not become invalid, but may not correspond
     * to the current document if it is mutated.
     * @param index Index into the snapshot collection.
     * @return The node at the <code>index</code>th position in the
     *   <code>NodeList</code>, or <code>null</code> if that is not a valid
     *   index.
     * @exception XPathException
     *   TYPE_ERR: raised if <code>resultType</code> is not
     *   <code>UNORDERED_NODE_SNAPSHOT_TYPE</code> or
     *   <code>ORDERED_NODE_SNAPSHOT_TYPE</code>.
     *
         * @see org.w3c.dom.xpath.XPathResult#snapshotItem(int)
         */
        public Node snapshotItem(int index) throws XPathException {

                if ((m_resultType != UNORDERED_NODE_SNAPSHOT_TYPE) &&
                    (m_resultType != ORDERED_NODE_SNAPSHOT_TYPE)) {
           String fmsg = XPATHMessages.createXPATHMessage(XPATHErrorResources.ER_NON_SNAPSHOT_TYPE, new Object[] {m_xpath.getPatternString(), getTypeString(m_resultType)});
           throw new XPathException(XPathException.TYPE_ERR, fmsg);
//              "The method snapshotItem cannot be called on the XPathResult of XPath expression {0} because its XPathResultType is {1}.
//              This method applies only to types UNORDERED_NODE_SNAPSHOT_TYPE and ORDERED_NODE_SNAPSHOT_TYPE."},
            }

        Node node = m_list.item(index);

        // Wrap "namespace node" in an XPathNamespace
        if (isNamespaceNode(node)) {
            return new XPathNamespaceImpl(node);
        } else {
            return node;
        }
        }
 

import com.sun.org.apache.xpath.internal.res.XPATHMessages; //导入依赖的package包/类
/**
         *  The value of this number result.
     * @exception XPathException
     *   TYPE_ERR: raised if <code>resultType</code> is not
     *   <code>NUMBER_TYPE</code>.
         * @see org.w3c.dom.xpath.XPathResult#getNumberValue()
         */
        public double getNumberValue() throws XPathException {
                if (getResultType() != NUMBER_TYPE) {
                        String fmsg = XPATHMessages.createXPATHMessage(XPATHErrorResources.ER_CANT_CONVERT_XPATHRESULTTYPE_TO_NUMBER, new Object[] {m_xpath.getPatternString(), getTypeString(m_resultType)});
                        throw new XPathException(XPathException.TYPE_ERR,fmsg);
//              "The XPathResult of XPath expression {0} has an XPathResultType of {1} which cannot be converted to a number"
                } else {
                        try {
                           return m_resultObj.num();
                        } catch (Exception e) {
                                // Type check above should prevent this exception from occurring.
                                throw new XPathException(XPathException.TYPE_ERR,e.getMessage());
                        }
                }
        }
 

import com.sun.org.apache.xpath.internal.res.XPATHMessages; //导入依赖的package包/类
/**
         * The value of this string result.
     * @exception XPathException
     *   TYPE_ERR: raised if <code>resultType</code> is not
     *   <code>STRING_TYPE</code>.
     *
         * @see org.w3c.dom.xpath.XPathResult#getStringValue()
         */
        public String getStringValue() throws XPathException {
                if (getResultType() != STRING_TYPE) {
                        String fmsg = XPATHMessages.createXPATHMessage(XPATHErrorResources.ER_CANT_CONVERT_TO_STRING, new Object[] {m_xpath.getPatternString(), m_resultObj.getTypeString()});
                        throw new XPathException(XPathException.TYPE_ERR,fmsg);
//              "The XPathResult of XPath expression {0} has an XPathResultType of {1} which cannot be converted to a string."
                } else {
                        try {
                           return m_resultObj.str();
                        } catch (Exception e) {
                                // Type check above should prevent this exception from occurring.
                                throw new XPathException(XPathException.TYPE_ERR,e.getMessage());
                        }
                }
        }
 

import com.sun.org.apache.xpath.internal.res.XPATHMessages; //导入依赖的package包/类
/**
         * @see org.w3c.dom.xpath.XPathResult#getBooleanValue()
         */
        public boolean getBooleanValue() throws XPathException {
                if (getResultType() != BOOLEAN_TYPE) {
                        String fmsg = XPATHMessages.createXPATHMessage(XPATHErrorResources.ER_CANT_CONVERT_TO_BOOLEAN, new Object[] {m_xpath.getPatternString(), getTypeString(m_resultType)});
                        throw new XPathException(XPathException.TYPE_ERR,fmsg);
//              "The XPathResult of XPath expression {0} has an XPathResultType of {1} which cannot be converted to a boolean."
                } else {
                        try {
                           return m_resultObj.bool();
                        } catch (TransformerException e) {
                                // Type check above should prevent this exception from occurring.
                                throw new XPathException(XPathException.TYPE_ERR,e.getMessage());
                        }
                }
        }
 

import com.sun.org.apache.xpath.internal.res.XPATHMessages; //导入依赖的package包/类
/**
         * The value of this single node result, which may be <code>null</code>.
     * @exception XPathException
     *   TYPE_ERR: raised if <code>resultType</code> is not
     *   <code>ANY_UNORDERED_NODE_TYPE</code> or
     *   <code>FIRST_ORDERED_NODE_TYPE</code>.
     *
         * @see org.w3c.dom.xpath.XPathResult#getSingleNodeValue()
         */
        public Node getSingleNodeValue() throws XPathException {

                if ((m_resultType != ANY_UNORDERED_NODE_TYPE) &&
                    (m_resultType != FIRST_ORDERED_NODE_TYPE)) {
                                String fmsg = XPATHMessages.createXPATHMessage(XPATHErrorResources.ER_CANT_CONVERT_TO_SINGLENODE, new Object[] {m_xpath.getPatternString(), getTypeString(m_resultType)});
                                throw new XPathException(XPathException.TYPE_ERR,fmsg);
//                              "The XPathResult of XPath expression {0} has an XPathResultType of {1} which cannot be converted to a single node.
//                               This method applies only to types ANY_UNORDERED_NODE_TYPE and FIRST_ORDERED_NODE_TYPE."
            }

                NodeIterator result = null;
                try {
                        result = m_resultObj.nodeset();
                } catch (TransformerException te) {
                        throw new XPathException(XPathException.TYPE_ERR,te.getMessage());
                }

        if (null == result) return null;

        Node node = result.nextNode();

        // Wrap "namespace node" in an XPathNamespace
        if (isNamespaceNode(node)) {
            return new XPathNamespaceImpl(node);
        } else {
            return node;
        }
        }
 

import com.sun.org.apache.xpath.internal.res.XPATHMessages; //导入依赖的package包/类
/**
         * The number of nodes in the result snapshot. Valid values for
     * snapshotItem indices are <code>0</code> to
     * <code>snapshotLength-1</code> inclusive.
     * @exception XPathException
     *   TYPE_ERR: raised if <code>resultType</code> is not
     *   <code>UNORDERED_NODE_SNAPSHOT_TYPE</code> or
     *   <code>ORDERED_NODE_SNAPSHOT_TYPE</code>.
     *
         * @see org.w3c.dom.xpath.XPathResult#getSnapshotLength()
         */
        public int getSnapshotLength() throws XPathException {

                if ((m_resultType != UNORDERED_NODE_SNAPSHOT_TYPE) &&
                    (m_resultType != ORDERED_NODE_SNAPSHOT_TYPE)) {
                                String fmsg = XPATHMessages.createXPATHMessage(XPATHErrorResources.ER_CANT_GET_SNAPSHOT_LENGTH, new Object[] {m_xpath.getPatternString(), getTypeString(m_resultType)});
                                throw new XPathException(XPathException.TYPE_ERR,fmsg);
//                              "The method getSnapshotLength cannot be called on the XPathResult of XPath expression {0} because its XPathResultType is {1}.
            }

                return m_list.getLength();
        }
 

import com.sun.org.apache.xpath.internal.res.XPATHMessages; //导入依赖的package包/类
/**
        * @exception DOMException
*   NAMESPACE_ERR: Always throws this exceptionn
        *
        * @see com.sun.org.apache.xml.internal.utils.PrefixResolver#getNamespaceForPrefix(String, Node)
        */
       public String getNamespaceForPrefix(String prefix, Node context) {
   String fmsg = XPATHMessages.createXPATHMessage(XPATHErrorResources.ER_NULL_RESOLVER, null);
   throw new DOMException(DOMException.NAMESPACE_ERR, fmsg);   // Unable to resolve prefix with null prefix resolver.
       }