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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.util.depend;
import java.io.File;
import java.io.IOException;
import java.util.Enumeration;
import org.apache.tools.ant.types.Path;
/**
* A dependency analyzer analyzes dependencies between Java classes to
* determine the minimal set of classes which are required by a set of
* "root" classes. Different implementations of this interface can
* use different strategies and libraries to determine the required set. For
* example, some analyzers will use class files while others might use
* source files. Analyzer specific configuration is catered for through a
* generic configure method
*
*/
public interface DependencyAnalyzer {
/**
* Add a source path to the source path used by this analyzer. The
* elements in the given path contain the source files for the classes
* being analyzed. Not all analyzers will use this information.
*
* @param sourcePath The Path instance specifying the source path
* elements.
*/
void addSourcePath(Path sourcePath);
/**
* Add a classpath to the classpath being used by the analyzer. The
* classpath contains the binary classfiles for the classes being
* analyzed The elements may either be the directories or jar files.Not
* all analyzers will use this information.
*
* @param classpath the Path instance specifying the classpath elements
*/
void addClassPath(Path classpath);
/**
* Add a root class. The root classes are used to drive the
* determination of dependency information. The analyzer will start at
* the root classes and add dependencies from there.
*
* @param classname the name of the class in Java dot notation.
*/
void addRootClass(String classname);
/**
* Get the list of files in the file system upon which the root classes
* depend. The files will be either the classfiles or jar files upon
* which the root classes depend.
*
* @return an enumeration of File instances.
*/
Enumeration<File> getFileDependencies();
/**
* Get the list of classes upon which root classes depend. This is a
* list of Java classnames in dot notation.
*
* @return an enumeration of Strings, each being the name of a Java
* class in dot notation.
*/
Enumeration<String> getClassDependencies();
/**
* Reset the dependency list. This will reset the determined
* dependencies and the also list of root classes.
*/
void reset();
/**
* Configure an aspect of the analyzer. The set of aspects that are
* supported is specific to each analyzer instance.
*
* @param name the name of the aspect being configured
* @param info the configuration information.
*/
void config(String name, Object info);
/**
* Set the closure flag. If this flag is true the analyzer will traverse
* all class relationships until it has collected the entire set of
* direct and indirect dependencies
*
* @param closure true if dependencies should be traversed to determine
* indirect dependencies.
*/
void setClosure(boolean closure);
/**
* Get the file that contains the class definition
*
* @param classname the name of the required class
* @return the file instance, zip or class, containing the
* class or null if the class could not be found.
* @exception IOException if the files in the classpath cannot be read.
*/
File getClassContainer(String classname) throws IOException;
/**
* Get the file that contains the class source.
*
* @param classname the name of the required class
* @return the file instance, zip or java, containing the
* source or null if the source for the class could not be found.
* @exception IOException if the files in the sourcepath cannot be read.
*/
File getSourceContainer(String classname) throws IOException;
}
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