com.sun.facelets.util.DevTools Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of jsf-facelets Show documentation
Show all versions of jsf-facelets Show documentation
Facelets is an open source alternative view handler technology for JavaServer Faces (JSF).
The newest version!
/**
* Licensed under the Common Development and Distribution License,
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.sun.com/cddl/
*
* 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 com.sun.facelets.util;
import java.beans.BeanInfo;
import java.beans.Introspector;
import java.beans.PropertyDescriptor;
import java.io.ByteArrayOutputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.io.Writer;
import java.lang.reflect.Method;
import java.text.DateFormat;
import java.util.Arrays;
import java.util.Collection;
import java.util.Date;
import java.util.Iterator;
import java.util.Map;
import java.util.SortedMap;
import java.util.TreeMap;
import java.util.logging.Logger;
import javax.el.Expression;
import javax.faces.component.UIComponent;
import javax.faces.component.UIViewRoot;
import javax.faces.context.ExternalContext;
import javax.faces.context.FacesContext;
import javax.faces.el.MethodBinding;
import javax.faces.el.ValueBinding;
public final class DevTools {
private final static String TS = "<";
private static final String ERROR_TEMPLATE = "META-INF/rsc/facelet-dev-error.xml";
private static String[] ERROR_PARTS;
private static final String DEBUG_TEMPLATE = "META-INF/rsc/facelet-dev-debug.xml";
private static String[] DEBUG_PARTS;
public DevTools() {
super();
}
public static void main(String[] argv) throws Exception {
DevTools.init();
}
private static void init() throws IOException {
if (ERROR_PARTS == null) {
ERROR_PARTS = splitTemplate(ERROR_TEMPLATE);
}
if (DEBUG_PARTS == null) {
DEBUG_PARTS = splitTemplate(DEBUG_TEMPLATE);
}
}
private static String[] splitTemplate(String rsc) throws IOException {
InputStream is = Thread.currentThread().getContextClassLoader().getResourceAsStream(rsc);
if (is == null) {
throw new FileNotFoundException(rsc);
}
ByteArrayOutputStream baos = new ByteArrayOutputStream();
byte[] buff = new byte[512];
int read;
while ((read = is.read(buff)) != -1) {
baos.write(buff, 0, read);
}
String str = baos.toString();
return str.split("@@");
}
public static void debugHtml(Writer writer, FacesContext faces, Exception e) throws IOException {
init();
Date now = new Date();
for (int i = 0; i < ERROR_PARTS.length; i++) {
if ("message".equals(ERROR_PARTS[i])) {
String msg = e.getMessage();
if (msg != null) {
writer.write(msg.replaceAll("<", TS));
} else {
writer.write(e.getClass().getName());
}
} else if ("trace".equals(ERROR_PARTS[i])) {
writeException(writer, e);
} else if ("now".equals(ERROR_PARTS[i])) {
writer.write(DateFormat.getDateTimeInstance().format(now));
} else if ("tree".equals(ERROR_PARTS[i])) {
writeComponent(writer, faces.getViewRoot());
} else if ("vars".equals(ERROR_PARTS[i])) {
writeVariables(writer, faces);
} else {
writer.write(ERROR_PARTS[i]);
}
}
}
private static void writeException(Writer writer, Exception e) throws IOException {
StringWriter str = new StringWriter(256);
PrintWriter pstr = new PrintWriter(str);
e.printStackTrace(pstr);
pstr.close();
writer.write(str.toString().replaceAll("<", TS));
}
public static void debugHtml(Writer writer, FacesContext faces) throws IOException {
init();
Date now = new Date();
for (int i = 0; i < DEBUG_PARTS.length; i++) {
if ("message".equals(DEBUG_PARTS[i])) {
writer.write(faces.getViewRoot().getViewId());
} else if ("now".equals(DEBUG_PARTS[i])) {
writer.write(DateFormat.getDateTimeInstance().format(now));
} else if ("tree".equals(DEBUG_PARTS[i])) {
writeComponent(writer, faces.getViewRoot());
} else if ("vars".equals(DEBUG_PARTS[i])) {
writeVariables(writer, faces);
} else {
writer.write(DEBUG_PARTS[i]);
}
}
}
private static void writeVariables(Writer writer, FacesContext faces) throws IOException {
ExternalContext ctx = faces.getExternalContext();
writeVariables(writer, ctx.getRequestParameterMap(), "Request Parameters");
writeVariables(writer, ctx.getRequestMap(), "Request Attributes");
if (ctx.getSession(false) != null) {
writeVariables(writer, ctx.getSessionMap(), "Session Attributes");
}
writeVariables(writer, ctx.getApplicationMap(), "Application Attributes");
}
private static void writeVariables(Writer writer, Map vars, String caption) throws IOException {
writer.write("");
writer.write(caption);
writer.write(" Name Value ");
writer.write(key.replaceAll("<", TS));
writer.write(" ");
writer.write(entry.getValue() == null
? "null"
: entry.getValue().toString()
.replaceAll("<", TS));
writer.write(" None
");
}
private static void writeComponent(Writer writer, UIComponent c) throws IOException {
writer.write("");
boolean hasChildren = c.getChildCount() > 0 || c.getFacets().size() > 0;
writeStart(writer, c, hasChildren);
writer.write("");
if (hasChildren) {
if (c.getFacets().size() > 0) {
Map.Entry entry;
for (Iterator itr = c.getFacets().entrySet().iterator(); itr.hasNext(); ) {
entry = (Map.Entry) itr.next();
writer.write("- ");
writer.write("");
writer.write((String) entry.getKey());
writer.write("");
writeComponent(writer, (UIComponent) entry.getValue());
writer.write("
");
}
}
if (c.getChildCount() > 0) {
for (Iterator itr = c.getChildren().iterator(); itr.hasNext(); ) {
writer.write("- ");
writeComponent(writer, (UIComponent) itr.next());
writer.write("
");
}
}
writer.write("- ");
writeEnd(writer, c);
writer.write("
");
}
writer.write("
");
}
private static void writeEnd(Writer writer, UIComponent c) throws IOException {
if (!isText(c)) {
writer.write(TS);
writer.write('/');
writer.write(getName(c));
writer.write('>');
}
}
private final static String[] IGNORE = new String[] { "parent", "rendererType" };
private static void writeAttributes(Writer writer, UIComponent c) {
try {
BeanInfo info = Introspector.getBeanInfo(c.getClass());
PropertyDescriptor[] pd = info.getPropertyDescriptors();
Method m = null;
Object v = null;
String str = null;
for (int i = 0; i < pd.length; i++) {
if (pd[i].getWriteMethod() != null && Arrays.binarySearch(IGNORE, pd[i].getName()) < 0) {
m = pd[i].getReadMethod();
try {
v = m.invoke(c, null);
if (v != null) {
if (v instanceof Collection || v instanceof Map || v instanceof Iterator) {
continue;
}
writer.write(" ");
writer.write(pd[i].getName());
writer.write("=\"");
if (v instanceof Expression) {
str = ((Expression) v).getExpressionString();
} else if (v instanceof ValueBinding) {
str = ((ValueBinding) v).getExpressionString();
} else if (v instanceof MethodBinding) {
str = ((MethodBinding) v).getExpressionString();
} else {
str = v.toString();
}
writer.write(str.replaceAll("<", TS));
writer.write("\"");
}
} catch (Exception e) {
// do nothing
}
}
}
ValueBinding binding = c.getValueBinding("binding");
if (binding != null) {
writer.write(" binding=\"");
writer.write(binding.getExpressionString().replaceAll("<", TS));
writer.write("\"");
}
} catch (Exception e) {
// do nothing
}
}
private static void writeStart(Writer writer, UIComponent c, boolean children) throws IOException {
if (isText(c)) {
String str = c.toString().trim();
writer.write(str.replaceAll("<", TS));
} else {
writer.write(TS);
writer.write(getName(c));
writeAttributes(writer, c);
if (children) {
writer.write('>');
} else {
writer.write("/>");
}
}
}
private static String getName(UIComponent c) {
String nm = c.getClass().getName();
return nm.substring(nm.lastIndexOf('.') + 1);
}
private static boolean isText(UIComponent c) {
return (c.getClass().getName().startsWith("com.sun.facelets.compiler"));
}
}