com.day.cq.wcm.tags.RequestURLTag Maven / Gradle / Ivy
/*
* Copyright 1997-2008 Day Management AG
* Barfuesserplatz 6, 4001 Basel, Switzerland
* All Rights Reserved.
*
* This software is the confidential and proprietary information of
* Day Management AG, ("Confidential Information"). You shall not
* disclose such Confidential Information and shall use it only in
* accordance with the terms of the license agreement you entered into
* with Day.
*/
package com.day.cq.wcm.tags;
import javax.servlet.jsp.tagext.TagSupport;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.JspWriter;
import javax.servlet.http.HttpServletRequest;
import java.util.Map;
import java.util.List;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.net.URLEncoder;
import java.io.IOException;
/**
* RequestURLTag writes the current request URL to the current
* JspWriter. The body of this tag allows multiple addParam and removeParam
* tags to modify the current request URL before it is written.
*/
public class RequestURLTag extends TagSupport {
private static final long serialVersionUID = -5674803762870190034L;
/**
* Maps query parameter name to a list of values.
*/
private Map> parameters = new HashMap>();
/**
* The request URI. Contains the web app context and the path, but no query
* parameters. See {@link HttpServletRequest#getRequestURI()}.
*/
private String uri;
/**
* Default constructor.
*/
public RequestURLTag() {
super();
init();
}
/**
* Removes the parameter and all its values with the given name.
*
* @param name the name of the parameter.
*/
public void removeParam(String name) {
parameters.remove(name);
}
/**
* Removes a value from the parameter with the given name.
*
* @param name name of the parameter.
* @param value the value to remove.
*/
public void removeParam(String name, String value) {
List values = parameters.get(name);
if (values != null) {
values.remove(value);
if (values.size() == 0) {
parameters.remove(name);
}
}
}
/**
* Adds a parameter with the given name and value.
*
* @param name the name of the parameter.
* @param value the value for the parameter.
*/
public void addParam(String name, String value) {
List values = parameters.get(name);
if (values == null) {
values = new ArrayList();
parameters.put(name, values);
}
values.add(value);
}
/**
* {@inheritDoc}
*/
public void release() {
init();
super.release();
}
/**
* {@inheritDoc}
*/
public int doStartTag() throws JspException {
HttpServletRequest request = (HttpServletRequest) pageContext.getRequest();
uri = request.getRequestURI();
for (Object o : request.getParameterMap().entrySet()) {
Map.Entry entry = (Map.Entry) o;
List values = new ArrayList();
values.addAll(Arrays.asList((String[]) entry.getValue()));
parameters.put((String) entry.getKey(), values);
}
return EVAL_BODY_INCLUDE;
}
/**
* {@inheritDoc}
*/
public int doEndTag() throws JspException {
JspWriter out = pageContext.getOut();
try {
out.print(uri);
String separator = "?";
for (Map.Entry> entry : parameters.entrySet()) {
String name = entry.getKey();
List values = entry.getValue();
for (String value : values) {
out.print(separator);
separator = "&";
out.print(URLEncoder.encode(name, "UTF-8"));
out.print("=");
out.print(URLEncoder.encode(value, "UTF-8"));
}
}
return super.doEndTag();
} catch (IOException e) {
throw new JspException(e);
} finally {
// reset
init();
}
}
private void init() {
parameters.clear();
uri = null;
}
}