requestctxobject.java

一个完整的XACML工程,学习XACML技术的好例子!

/*
 * RequestCtxObject.java
 *
 * Created on 04 September 2006, 13:43
 *
 * To change this template, choose Tools | Template Manager
 * and open the template in the editor.
 */

package uk.ac.kent.dpa.coord.clients;

import org.w3c.dom.*;
import java.util.ArrayList;
/**
 *
 * @author ls97
 */
public class RequestCtxObject {
    
    Element requestCtx;
    /** Creates a new instance of RequestCtxObject */
    public RequestCtxObject(Element request) {
        this.requestCtx=request;
    }
    
    public String getMethod()throws ClientException {
        NodeList list = this.requestCtx.getChildNodes();
        for (int i=0; i<list.getLength(); i++) {
            Node node = list.item(i);
            if (Text.class.isAssignableFrom(node.getClass())) continue;
            if (node.getNodeName().equals("Method")) {
                return ((Element)node).getAttribute("name");
            }
        }
        return null;
    }
    
    public String getType()throws ClientException {
        NodeList list = this.requestCtx.getChildNodes();
        for (int i=0; i<list.getLength(); i++) {
            Node node = list.item(i);
            if (Text.class.isAssignableFrom(node.getClass())) continue;
            if (node.getNodeName().equals("Method")) {
                return ((Element)node).getAttribute("type");
            }
        }
        return null;
    }
    
    public String getService()throws ClientException {
        return this.requestCtx.getAttribute("service");
    }
    
    public String[] getParameterNames() throws ClientException {
        ArrayList arr = new ArrayList();
        NodeList list = this.requestCtx.getChildNodes();
        for (int i=0; i<list.getLength(); i++) {
            Node node = list.item(i);
            if (Text.class.isAssignableFrom(node.getClass())) continue;
            if (node.getNodeName().equals("Method")) {
                NodeList list1 = node.getChildNodes();
                for (int j=0; j<list1.getLength(); j++) {
                    Node node1 = list1.item(j);
                    if (Text.class.isAssignableFrom(node1.getClass())) continue;
                    if (node1.getNodeName().equals("Parameter")) {
                        Element ele = (Element)node1;
                        String name = ele.getAttribute("name");
                        arr.add(name);
                    }
                }
            }
        }
        String [] res = new String[arr.size()];
        res = (String[])arr.toArray(res);
        return res;
    }
    
    public String getParameterType(String name) throws ClientException {
        NodeList list = this.requestCtx.getChildNodes();
        for (int i=0; i<list.getLength(); i++) {
            Node node = list.item(i);
            if (Text.class.isAssignableFrom(node.getClass())) continue;
            if (node.getNodeName().equals("Method")) {
                NodeList list1 = node.getChildNodes();
                for (int j=0; j<list1.getLength(); j++) {
                    Node node1 = list1.item(j);
                    if (Text.class.isAssignableFrom(node1.getClass())) continue;
                    if (node1.getNodeName().equals("Parameter")) {
                        Element ele = (Element)node1;
                        if (ele.getAttribute("name").equals(name)) {
                            return ele.getAttribute("type");
                        }
                    }
                }
            }
        }
        return null;
    }
    
    public Object getParameter(String name) throws ClientException {
        NodeList list = this.requestCtx.getChildNodes();
        for (int i=0; i<list.getLength(); i++) {
            Node node = list.item(i);
            if (Text.class.isAssignableFrom(node.getClass())) continue;
            if (node.getNodeName().equals("Method")) {
                NodeList list1 = node.getChildNodes();
                for (int j=0; j<list1.getLength(); j++) {
                    Node node1 = list1.item(j);
                    if (Text.class.isAssignableFrom(node1.getClass())) continue;
                    if (node1.getNodeName().equals("Parameter")) {
                        Element ele = (Element)node1;
                        if (ele.getAttribute("name").equals(name)) {
                            String type = ele.getAttribute("type");
                            if (type.equals("integer")) {
                                NodeList list2 = node1.getChildNodes();
                                for (int k=0; k<list2.getLength(); k++) {
                                    Node node2 = list2.item(k);
                                    if (Text.class.isAssignableFrom(node2.getClass())) continue;
                                    if (node2.getNodeName().equals("Value")) {
                                        NodeList list3 = node2.getChildNodes();
                                        for (int l=0; l<list3.getLength(); l++) {
                                            Node node3 = list3.item(l);
                                            if (Text.class.isAssignableFrom(node3.getClass())) {
                                                return new Integer(node3.getNodeValue());
                                            } else throw new ClientException("invalid request context");
                                        }
                                    }
                                }
                            } else if (type.equals("float")) {
                                NodeList list2 = node1.getChildNodes();
                                for (int k=0; k<list2.getLength(); k++) {
                                    Node node2 = list2.item(k);
                                    if (Text.class.isAssignableFrom(node2.getClass())) continue;
                                    if (node2.getNodeName().equals("Values")) {
                                        NodeList list3 = node2.getChildNodes();
                                        for (int l=0; l<list3.getLength(); l++) {
                                            Node node3 = list3.item(l);
                                            if (Text.class.isAssignableFrom(node3.getClass())) {
                                                return new Float(node3.getNodeValue());
                                            } else throw new ClientException("invalid request context");
                                        }
                                    }
                                }
                            } else if (type.equals("string")) {
                                NodeList list2 = node1.getChildNodes();
                                for (int k=0; k<list2.getLength(); k++) {
                                    Node node2 = list2.item(k);
                                    if (Text.class.isAssignableFrom(node2.getClass())) continue;
                                    if (node2.getNodeName().equals("Values")) {
                                        NodeList list3 = node2.getChildNodes();
                                        for (int l=0; l<list3.getLength(); l++) {
                                            Node node3 = list3.item(l);
                                            if (Text.class.isAssignableFrom(node3.getClass())) {
                                                return new String(node3.getNodeValue());
                                            } else throw new ClientException("invalid request context");
                                        }
                                    }
                                }
                            } else throw new ClientException("invalid parameter type");
                        }
                    }
                }
            }
        }
        return null;
    }
}