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/*
* 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.jasper.compiler;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.lang.reflect.InvocationTargetException;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.servlet.jsp.tagext.PageData;
import org.apache.jasper.JasperException;
/** This class is similar to org.apache.jasper.compiler.Validator, it only
* allows getting access to the XML view of the page.
*
* @author Petr Jiricka
*/
public class NbValidator {
private static final Logger LOGGER = Logger.getLogger(NbValidator.class.getName());
private static Method validateXmlViewM;
private static Field bufF;
static {
initReflection();
}
private static void initReflection() {
try {
validateXmlViewM = Validator.class.getDeclaredMethod("validateXmlView", new Class[] {PageData.class, Compiler.class}); // NOI18N
validateXmlViewM.setAccessible(true);
bufF = PageDataImpl.class.getDeclaredField("buf"); // NOI18N
bufF.setAccessible(true);
} catch (NoSuchMethodException e) {
LOGGER.log(Level.INFO, null, e);
} catch (NoSuchFieldException e) {
LOGGER.log(Level.INFO, null, e);
}
}
/** Returns the XML view of the page.
*/
public static String validate(Compiler compiler, Node.Nodes page) throws JasperException {
/*
* Visit the page/tag directives first, as they are global to the page
* and are position independent.
*/
page.visit(new Validator.DirectiveVisitor(compiler));
// Determine the default output content type
PageInfo pageInfo = compiler.getPageInfo();
String contentType = pageInfo.getContentType();
if (contentType == null || contentType.indexOf("charset=") < 0) { // NOI18N
boolean isXml = page.getRoot().isXmlSyntax();
String defaultType;
if (contentType == null) {
defaultType = isXml? "text/xml": "text/html"; // NOI18N
} else {
defaultType = contentType;
}
String charset = null;
if (isXml) {
charset = "UTF-8"; // NOI18N
} else {
if (!page.getRoot().isDefaultPageEncoding()) {
charset = page.getRoot().getPageEncoding();
}
}
if (charset != null) {
pageInfo.setContentType(defaultType + ";charset=" + charset); // NOI18N
} else {
pageInfo.setContentType(defaultType);
}
}
/*
* Validate all other nodes.
* This validation step includes checking a custom tag's mandatory and
* optional attributes against information in the TLD (first validation
* step for custom tags according to JSP.10.5).
*/
page.visit(new Validator.ValidateVisitor(compiler));
/*
* Invoke TagLibraryValidator classes of all imported tags
* (second validation step for custom tags according to JSP.10.5).
*/
// validateXmlView(new PageDataImpl(page, compiler), compiler);
try {
PageDataImpl pdi = new PageDataImpl(page, compiler);
validateXmlViewM.invoke(null, new Object[] {pdi, compiler});
/*
* Invoke TagExtraInfo method isValid() for all imported tags
* (third validation step for custom tags according to JSP.10.5).
*/
page.visit(new Validator.TagExtraInfoVisitor(compiler));
StringBuilder sb = (StringBuilder)bufF.get(pdi);
return sb.toString();
} catch (IllegalAccessException e) {
LOGGER.log(Level.INFO, null, e);
throw new JasperException(e.getMessage());
} catch (InvocationTargetException e) {
Throwable target = e.getTargetException();
if (target instanceof JasperException) {
throw (JasperException)target;
} else {
LOGGER.log(Level.INFO, null, e);
throw new JasperException(e.getMessage());
}
}
}
}
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