com.izforge.izpack.compiler.helper.CompilerHelper Maven / Gradle / Ivy
/*
* IzPack - Copyright 2001-2012 Julien Ponge, All Rights Reserved.
*
* http://izpack.org/
* http://izpack.codehaus.org/
*
* Licensed 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 com.izforge.izpack.compiler.helper;
import java.io.IOException;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;
import java.util.jar.JarInputStream;
import java.util.zip.ZipEntry;
import org.apache.commons.lang.StringUtils;
/**
* Helper for compiler
*/
public class CompilerHelper
{
/**
* Given an event class, return the jar path
*
* @param name Name of the event class
* @return Path to the jar
*/
public String resolveCustomActionsJarPath(String name)
{
StringBuilder stringBuilder = new StringBuilder();
stringBuilder.append("bin/customActions/");
stringBuilder.append("izpack");
stringBuilder.append(convertNameToDashSeparated(name));
stringBuilder.append(".jar");
return stringBuilder.toString();
}
/**
* Convert a camel-case class name to a separate dashes nanem
*
* @param name Class name
* @return minuscule separate dashe name
*/
public StringBuilder convertNameToDashSeparated(String name)
{
StringBuilder res = new StringBuilder();
for (String part : StringUtils.splitByCharacterTypeCamelCase(name))
{
res.append('-');
res.append(part.toLowerCase());
}
return res;
}
/**
* Returns the qualified class name for the given class. This method expects as the url param a
* jar file which contains the given class. It scans the zip entries of the jar file.
*
* @param url url of the jar file which contains the class
* @param className short name of the class for which the full name should be resolved
* @return full qualified class name
* @throws IOException if the jar cannot be read
*/
public String getFullClassName(URL url, String className) throws IOException
{
JarInputStream jis = new JarInputStream(url.openStream());
ZipEntry zentry;
while ((zentry = jis.getNextEntry()) != null)
{
String name = zentry.getName();
int lastPos = name.lastIndexOf(".class");
if (lastPos < 0)
{
continue; // No class file.
}
name = name.replace('/', '.');
int pos = -1;
int nonCasePos = -1;
if (className != null)
{
pos = name.indexOf(className);
nonCasePos = name.toLowerCase().indexOf(className.toLowerCase());
}
if (pos != -1 && name.length() == pos + className.length() + 6) // "Main" class found
{
jis.close();
return (name.substring(0, lastPos));
}
if (nonCasePos != -1 && name.length() == nonCasePos + className.length() + 6)
// "Main" class with different case found
{
throw new IllegalArgumentException(
"Fatal error! The declared panel name in the xml file (" + className
+ ") differs in case to the founded class file (" + name + ").");
}
}
jis.close();
return (null);
}
/**
* Returns a list which contains the pathes of all files which are included in the given url.
* This method expects as the url param a jar.
*
* @param url url of the jar file
* @return full qualified paths of the contained files
* @throws IOException if the jar cannot be read
*/
public List getContainedFilePaths(URL url) throws IOException
{
JarInputStream jis = new JarInputStream(url.openStream());
ZipEntry zentry;
ArrayList fullNames = new ArrayList();
while ((zentry = jis.getNextEntry()) != null)
{
String name = zentry.getName();
// Add only files, no directory entries.
if (!zentry.isDirectory())
{
fullNames.add(name);
}
}
jis.close();
return (fullNames);
}
}