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| package org.dom4j.xpath; |
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| |
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| import java.io.Serializable; |
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| import java.util.Collections; |
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| import java.util.Comparator; |
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| import java.util.HashMap; |
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| import java.util.HashSet; |
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| import java.util.Iterator; |
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| import java.util.List; |
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| import java.util.Map; |
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| |
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| import org.dom4j.InvalidXPathException; |
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| import org.dom4j.Node; |
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| import org.dom4j.NodeFilter; |
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| import org.dom4j.XPathException; |
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| import org.jaxen.FunctionContext; |
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| import org.jaxen.JaxenException; |
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| import org.jaxen.NamespaceContext; |
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| import org.jaxen.SimpleNamespaceContext; |
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| import org.jaxen.VariableContext; |
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| import org.jaxen.XPath; |
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| import org.jaxen.dom4j.Dom4jXPath; |
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| public class DefaultXPath implements org.dom4j.XPath, NodeFilter, Serializable { |
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| |
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| private String text; |
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| private XPath xpath; |
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| private NamespaceContext namespaceContext; |
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| public DefaultXPath(String text) throws InvalidXPathException {
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| this.text = text;
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| this.xpath = parse( text );
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| } |
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| |
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| public String toString() {
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| return "[XPath: " + xpath + "]";
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| } |
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| public String getText() {
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| return text;
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| } |
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| |
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| public FunctionContext getFunctionContext() {
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| return xpath.getFunctionContext();
|
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| } |
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| |
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| public void setFunctionContext(FunctionContext functionContext) {
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| xpath.setFunctionContext(functionContext);
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| } |
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| |
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| public NamespaceContext getNamespaceContext() {
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| return namespaceContext;
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| } |
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| |
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| public void setNamespaceURIs(Map map) {
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| setNamespaceContext( new SimpleNamespaceContext( map ) );
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| } |
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| |
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| public void setNamespaceContext(NamespaceContext namespaceContext) {
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| this.namespaceContext = namespaceContext;
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| xpath.setNamespaceContext(namespaceContext);
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| } |
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| |
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| public VariableContext getVariableContext() {
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| return xpath.getVariableContext();
|
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| } |
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| public void setVariableContext(VariableContext variableContext) {
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| xpath.setVariableContext(variableContext);
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| } |
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| |
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| public Object evaluate(Object context) {
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| try {
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| setNSContext(context);
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| List answer = xpath.selectNodes( context );
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| if ( answer != null && answer.size() == 1 ) {
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| return answer.get(0);
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| } |
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| return answer;
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| } |
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| catch (JaxenException e) { |
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| handleJaxenException(e);
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| return null;
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| } |
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| } |
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| |
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| public Object selectObject(Object context) {
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| return evaluate(context);
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| } |
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| |
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| public List selectNodes(Object context) {
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| try {
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| setNSContext(context);
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| return xpath.selectNodes( context );
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| } |
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| catch (JaxenException e) { |
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| handleJaxenException(e);
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| return Collections.EMPTY_LIST;
|
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| } |
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| } |
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| public List selectNodes(Object context, org.dom4j.XPath sortXPath) {
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| List answer = selectNodes( context );
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| sortXPath.sort( answer );
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| return answer;
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| } |
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| |
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| public List selectNodes(Object context, org.dom4j.XPath sortXPath, boolean distinct) {
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| List answer = selectNodes( context );
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| sortXPath.sort( answer, distinct );
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| return answer;
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| } |
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| |
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| public Node selectSingleNode(Object context) {
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| try {
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| setNSContext(context);
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| Object answer = xpath.selectSingleNode( context );
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| if ( answer instanceof Node ) {
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| return (Node) answer;
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| } |
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| if ( answer == null ) {
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| return null;
|
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| } |
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| throw new XPathException(
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| "The result of the XPath expression is not a Node. It was: " |
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| + answer + " of type: " + answer.getClass().getName() |
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| + ". You might want to use a different method such as selectObject() to evaluate this XPath expression" |
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| ); |
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| } |
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| catch (JaxenException e) { |
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| handleJaxenException(e);
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| return null;
|
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| } |
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| } |
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| public String valueOf(Object context) {
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| try {
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| setNSContext(context);
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| return xpath.valueOf( context );
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| } |
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| catch (JaxenException e) { |
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| handleJaxenException(e);
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| return "";
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| } |
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| } |
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| |
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| public Number numberValueOf(Object context) {
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| try {
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| setNSContext(context);
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| return xpath.numberValueOf( context );
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| } |
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| catch (JaxenException e) { |
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| handleJaxenException(e);
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| return null;
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| } |
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| } |
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| |
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| public boolean booleanValueOf(Object context) {
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| try {
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| setNSContext(context);
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| return xpath.booleanValueOf(context);
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| } |
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| catch(JaxenException e) { |
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| handleJaxenException(e);
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| return false;
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| } |
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| } |
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| public void sort( List list ) {
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| sort( list, false );
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| } |
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| public void sort( List list, boolean distinct ) {
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| if ( list != null && ! list.isEmpty() ) {
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| int size = list.size();
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| HashMap sortValues = new HashMap( size );
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| for ( int i = 0; i < size; i++ ) {
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| Object object = list.get(i);
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| if ( object instanceof Node ) {
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| Node node = (Node) object;
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| Object expression = getCompareValue(node);
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| sortValues.put(node, expression);
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| } |
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| } |
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| sort( list, sortValues );
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| |
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| if (distinct) {
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| removeDuplicates( list, sortValues );
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| } |
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| } |
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| } |
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| |
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| public boolean matches( Node node ) {
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| try {
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| setNSContext(node);
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| List answer = xpath.selectNodes( node );
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| if ( answer != null && answer.size() > 0 ) {
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| Object item = answer.get(0);
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| if ( item instanceof Boolean ) {
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| return ((Boolean) item).booleanValue();
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| } |
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| return answer.contains( node );
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| } |
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| return false;
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| } |
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| catch (JaxenException e) { |
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| handleJaxenException(e);
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| return false;
|
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| } |
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| } |
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| protected void sort( List list, final Map sortValues ) {
|
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| Collections.sort(
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| list, |
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| new Comparator() { |
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| public int compare(Object o1, Object o2) {
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| o1 = sortValues.get(o1);
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| o2 = sortValues.get(o2);
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| if ( o1 == o2 ) {
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| return 0;
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| } |
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16776
| else if ( o1 instanceof Comparable ) {
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| Comparable c1 = (Comparable) o1;
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| return c1.compareTo(o2);
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| } |
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| else if ( o1 == null ) {
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| return 1;
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| } |
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| else if ( o2 == null ) {
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| return -1;
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| } |
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| else { |
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| return o1.equals(o2) ? 0 : -1;
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| } |
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| } |
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| } |
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| ); |
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| } |
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| protected void removeDuplicates( List list, Map sortValues ) {
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| |
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| HashSet distinctValues = new HashSet();
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| for ( Iterator iter = list.iterator(); iter.hasNext(); ) {
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| Object node = iter.next();
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| Object value = sortValues.get(node);
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| if ( distinctValues.contains( value ) ) {
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| iter.remove();
|
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| } |
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| else { |
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| distinctValues.add( value );
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| } |
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| } |
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| } |
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3916
| protected Object getCompareValue(Node node) {
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| return valueOf( node );
|
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| } |
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| |
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| protected static XPath parse(String text) {
|
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| try {
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| return new Dom4jXPath( text );
|
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| } |
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| catch (JaxenException e) { |
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8
| throw new InvalidXPathException( text, e.getMessage() );
|
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| } |
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| catch (RuntimeException e) { |
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| } |
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| throw new InvalidXPathException( text );
|
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| } |
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| |
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5154
| protected void setNSContext(Object context) {
|
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| if ( namespaceContext == null ) {
|
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5136
| xpath.setNamespaceContext( DefaultNamespaceContext.create(context) );
|
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| } |
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| } |
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| |
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0
| protected void handleJaxenException(JaxenException e) throws XPathException {
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| throw new XPathException(text, e);
|
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| } |
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| } |
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