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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.tools.ant.taskdefs.optional.native2ascii;
import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.ProjectComponent;
import org.apache.tools.ant.types.Path;
import org.apache.tools.ant.util.ClasspathUtils;
import org.apache.tools.ant.util.JavaEnvUtils;
/**
* Creates the Native2AsciiAdapter based on the user choice and
* potentially the VM vendor.
*
* @since Ant 1.6.3
*/
// CheckStyle:HideUtilityClassConstructorCheck OFF (bc)
public class Native2AsciiAdapterFactory {
/**
* Determines the default choice of adapter based on the VM
* vendor.
*
* @return the default choice of adapter based on the VM
* vendor
*/
public static String getDefault() {
if (JavaEnvUtils.isKaffe() || JavaEnvUtils.isClasspathBased()) {
return KaffeNative2Ascii.IMPLEMENTATION_NAME;
}
return SunNative2Ascii.IMPLEMENTATION_NAME;
}
/**
* Creates the Native2AsciiAdapter based on the user choice and
* potentially the VM vendor.
*
* @param choice the user choice (if any).
* @param log a ProjectComponent instance used to access Ant's
* logging system.
* @return The adapter to use.
* @throws BuildException if there was a problem.
*/
public static Native2AsciiAdapter getAdapter(String choice,
ProjectComponent log)
throws BuildException {
return getAdapter(choice, log, null);
}
/**
* Creates the Native2AsciiAdapter based on the user choice and
* potentially the VM vendor.
*
* @param choice the user choice (if any).
* @param log a ProjectComponent instance used to access Ant's
* logging system.
* @param classpath the classpath to use when looking up an
* adapter class
* @return The adapter to use.
* @throws BuildException if there was a problem.
* @since Ant 1.8.0
*/
public static Native2AsciiAdapter getAdapter(String choice,
ProjectComponent log,
Path classpath)
throws BuildException {
if (((JavaEnvUtils.isKaffe() || JavaEnvUtils.isClasspathBased()) && choice == null)
|| KaffeNative2Ascii.IMPLEMENTATION_NAME.equals(choice)) {
return new KaffeNative2Ascii();
} else if (SunNative2Ascii.IMPLEMENTATION_NAME.equals(choice)) {
return new SunNative2Ascii();
} else if (choice != null) {
return resolveClassName(choice,
// Memory leak in line below
log.getProject()
.createClassLoader(classpath));
}
// This default has been good enough until Ant 1.6.3, so stick
// with it
return new SunNative2Ascii();
}
/**
* Tries to resolve the given classname into a native2ascii adapter.
* Throws a fit if it can't.
*
* @param className The fully qualified classname to be created.
* @param loader the classloader to use
* @throws BuildException This is the fit that is thrown if className
* isn't an instance of Native2AsciiAdapter.
*/
private static Native2AsciiAdapter resolveClassName(String className,
ClassLoader loader)
throws BuildException {
return (Native2AsciiAdapter) ClasspathUtils.newInstance(className,
loader != null ? loader :
Native2AsciiAdapterFactory.class.getClassLoader(),
Native2AsciiAdapter.class);
}
}
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