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org.apache.struts.faces.renderer.JavascriptValidatorRenderer Maven / Gradle / Ivy
/*
* $Id$
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.struts.faces.renderer;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.Iterator;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.function.Function;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseWriter;
import org.apache.commons.validator.Field;
import org.apache.commons.validator.Form;
import org.apache.commons.validator.ValidatorAction;
import org.apache.commons.validator.ValidatorResources;
import org.apache.commons.validator.Var;
import org.apache.commons.validator.util.ValidatorUtils;
import org.apache.struts.Globals;
import org.apache.struts.config.ModuleConfig;
import org.apache.struts.faces.component.FormComponent;
import org.apache.struts.faces.component.JavascriptValidatorComponent;
import org.apache.struts.faces.util.StrutsContext;
import org.apache.struts.faces.util.Utils;
import org.apache.struts.util.MessageResources;
import org.apache.struts.validator.Resources;
import org.apache.struts.validator.ValidatorPlugIn;
/**
* {@code Renderer} implementation for the
* {@code JavascriptValidator} tag from the
* Struts-Faces Integration Library .
*
* @version $Rev$ $Date$
*/
public class JavascriptValidatorRenderer extends AbstractRenderer {
private final static Function SIZE_VA = (va) ->
va == null || va.getDepends() == null ? 0 : va.getDepends().length();
private final static Comparator COMP_VA = (va1, va2) -> {
final int size1 = SIZE_VA.apply(va1);
final int size2 = SIZE_VA.apply(va2);
if (size1 == 0) {
return size2 == 0 ? 0 : -1;
} else if (size2 == 0) {
return 1;
}
return va1.getDependencyList().size()
- va2.getDependencyList().size();
};
private final static String HTML_BEGIN_COMMENT = "\n \n";
// ---------------------------------------------------------- Public Methods
/**
* Render the beginning {@code script} tag.
*
* @param context FacesContext for the current request
* @param component UIComponent to be rendered
*
* @exception IOException if an input/output error occurs while rendering
* @exception NullPointerException if {@code context}
* or {@code component} is {@code null}
*/
protected void renderEnd(FacesContext context, UIComponent component,
ResponseWriter writer) throws IOException {
if (context == null || component == null) {
throw new NullPointerException();
}
final StringBuilder results = new StringBuilder();
final StrutsContext strutsContext = new StrutsContext(context);
JavascriptValidatorComponent jsv = (JavascriptValidatorComponent) component;
ModuleConfig config = strutsContext.getModuleConfig();
ValidatorResources resources = Utils.getMapValue(ValidatorResources.class,
context.getExternalContext().getApplicationMap(),
ValidatorPlugIn.VALIDATOR_KEY + config.getPrefix());
Locale locale = strutsContext.getLocale();
// Look up the MessageResources bundle to be used
String bundle = jsv.getBundle();
if (bundle == null) {
bundle = Globals.MESSAGES_KEY;
}
Form form = resources.getForm(locale, jsv.getFormName());
if (form != null) {
if (jsv.isDynamicJavascript()) {
MessageResources messages = Utils.getMapValue(MessageResources.class,
context.getExternalContext().getApplicationMap(), bundle);
List lActions = new ArrayList<>();
List lActionMethods = new ArrayList<>();
// Get List of actions for this Form
for (Field field : form.getFields()) {
for (String depends : field.getDependencyList()) {
if (depends != null && !lActionMethods.contains(depends)) {
lActionMethods.add(depends);
}
}
}
// Create list of ValidatorActions based on lActionMethods
for (Iterator i = lActionMethods.iterator(); i.hasNext();) {
String depends = i.next();
ValidatorAction va = resources.getValidatorAction(depends);
// throw nicer NPE for easier debugging
if (va == null) {
throw new NullPointerException(
"Depends string \""
+ depends
+ "\" was not found in validator-rules.xml.");
}
String javascript = va.getJavascript();
if (javascript != null && javascript.length() > 0) {
lActions.add(va);
} else {
i.remove();
}
}
Collections.sort(lActions, COMP_VA);
String methods = null;
for (ValidatorAction va : lActions) {
if (methods == null) {
methods = va.getMethod() + "(form)";
} else {
methods += " && " + va.getMethod() + "(form)";
}
}
results.append(getJavascriptBegin(methods, jsv));
final String formClientId = getFormClientId(jsv);
final String formClientIdFunc = formClientId.replace(':', '_');
for (ValidatorAction va : lActions) {
String jscriptVar = null;
String functionName = null;
if (va.getJsFunctionName() != null
&& va.getJsFunctionName().length() > 0) {
functionName = va.getJsFunctionName();
} else {
functionName = va.getName();
}
results.append(" function " +
formClientIdFunc + "_" + functionName +
" () { \n");
for (Field field : form.getFields()) {
// Skip indexed fields for now until there is a good
// way to handle error messages (and the length of the
// list (could retrieve from scope?))
if (field.isIndexed()
|| field.getPage() != jsv.getPage()
|| !field.isDependency(va.getName())) {
continue;
}
String message =
Resources.getMessage(messages, locale, va, field);
message = (message != null) ? message : "";
jscriptVar = this.getNextVar(jscriptVar);
results.append(
" this."
+ jscriptVar
+ " = new Array(\""
+ formClientId
+ ":"
+ field.getKey()
+ "\", \""
+ message
+ "\", ");
results.append("new Function (\"varName\", \"");
Map vars = field.getVars();
// Loop through the field's variables.
for (Map.Entry entry : vars.entrySet()) {
String varName = entry.getKey();
Var var = entry.getValue();
String varValue = var.getValue();
String jsType = var.getJsType();
// skip requiredif variables field, fieldIndexed,
// fieldTest, fieldValue
if (varName.startsWith("field")) {
continue;
}
if (Var.JSTYPE_INT.equalsIgnoreCase(jsType)) {
results.append(
"this."
+ varName
+ "="
+ ValidatorUtils.replace(
varValue,
"\\",
"\\\\")
+ "; ");
} else if (Var.JSTYPE_REGEXP.equalsIgnoreCase(
jsType)) {
results.append(
"this."
+ varName
+ "=/"
+ ValidatorUtils.replace(
varValue,
"\\",
"\\\\")
+ "/; ");
} else if (Var.JSTYPE_STRING.equalsIgnoreCase(
jsType)) {
results.append(
"this."
+ varName
+ "='"
+ ValidatorUtils.replace(
varValue,
"\\",
"\\\\")
+ "'; ");
// So everyone using the latest format doesn't
// need to change their xml files immediately.
} else if ("mask".equalsIgnoreCase(varName)) {
results.append(
"this."
+ varName
+ "=/"
+ ValidatorUtils.replace(
varValue,
"\\",
"\\\\")
+ "/; ");
} else {
results.append(
"this."
+ varName
+ "='"
+ ValidatorUtils.replace(
varValue,
"\\",
"\\\\")
+ "'; ");
}
}
results.append(" return this[varName];\"));\n");
}
results.append(" } \n\n");
}
} else if (jsv.isStaticJavascript()) {
results.append(getStartElement(jsv));
if (jsv.isHtmlComment()) {
results.append(HTML_BEGIN_COMMENT);
}
}
}
if (jsv.isStaticJavascript()) {
results.append(getJavascriptStaticMethods(resources));
}
if (form != null
&& (jsv.isDynamicJavascript() || jsv.isStaticJavascript())) {
results.append(getJavascriptEnd(jsv));
}
writer.write(results.toString());
}
// ----------------------------------------------------------- Properties
/**
* Returns the opening script element and some initial JavaScript.
*/
protected String getJavascriptBegin(String methods, JavascriptValidatorComponent component) {
StringBuilder sb = new StringBuilder();
String name =
component.getFormName().substring(0, 1).toUpperCase()
+ component.getFormName().substring(1);
sb.append(getStartElement(component));
if (isXhtml(component) && component.isCdata()) {
sb.append(" 0) {
sb.append(javascript + "\n");
}
}
}
return sb.toString();
}
/**
* Returns the closing script element.
*/
protected String getJavascriptEnd(JavascriptValidatorComponent component) {
StringBuilder sb = new StringBuilder();
sb.append("\n");
if (!isXhtml(component) && component.isHtmlComment()){
sb.append(HTML_END_COMMENT);
}
if (isXhtml(component) && component.isCdata()) {
sb.append("]]>\r\n");
}
sb.append("\n\n");
return sb.toString();
}
/**
* The value {@code null} will be returned at the end of the sequence.
* ex: "zz" will return {@code null}
*/
private String getNextVar(String input) {
if (input == null) {
return "aa";
}
input = input.toLowerCase();
for (int i = input.length(); i > 0; i--) {
int pos = i - 1;
char c = input.charAt(pos);
c++;
if (c <= 'z') {
if (i == 0) {
return c + input.substring(pos, input.length());
} else if (i == input.length()) {
return input.substring(0, pos) + c;
} else {
return input.substring(0, pos) + c + input.substring(pos,
input.length() - 1);
}
} else {
input = replaceChar(input, pos, 'a');
}
}
return null;
}
/**
* Replaces a single character in a {@code String}
*/
private String replaceChar(String input, int pos, char c) {
if (pos == 0) {
return c + input.substring(pos, input.length());
} else if (pos == input.length()) {
return input.substring(0, pos) + c;
} else {
return input.substring(0, pos) + c + input.substring(pos,
input.length() - 1);
}
}
/**
* Constructs the beginning <script> element depending on
* xhtml status.
*/
private String getStartElement(JavascriptValidatorComponent component) {
StringBuilder start =
new StringBuilder(" 