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AncestorAnalyzer.javaAPI DocApache Ant 1.705078Wed Dec 13 06:16:18 GMT 2006org.apache.tools.ant.util.depend.bcel

AncestorAnalyzer

public class AncestorAnalyzer extends org.apache.tools.ant.util.depend.AbstractAnalyzer
A dependency analyzer which returns superclass and superinterface dependencies.

Fields Summary
Constructors Summary
public AncestorAnalyzer()
Default constructor Causes the BCEL classes to load to ensure BCEL dependencies can be satisfied

        // force BCEL classes to load now
        try {
            new ClassParser("force");
        } catch (IOException e) {
            // ignore
        }
    
Methods Summary
protected voiddetermineDependencies(java.util.Vector files, java.util.Vector classes)
Determine the dependencies of the configured root classes.

param
files a vector to be populated with the files which contain the dependency classes
param
classes a vector to be populated with the names of the depencency classes.

        // we get the root classes and build up a set of
        // classes upon which they depend
        Hashtable dependencies = new Hashtable();
        Hashtable containers = new Hashtable();
        Hashtable toAnalyze = new Hashtable();
        Hashtable nextAnalyze = new Hashtable();
        for (Enumeration e = getRootClasses(); e.hasMoreElements();) {
            String classname = (String) e.nextElement();
            toAnalyze.put(classname, classname);
        }

        int count = 0;
        int maxCount = isClosureRequired() ? MAX_LOOPS : 2;
        while (toAnalyze.size() != 0 && count++ < maxCount) {
            nextAnalyze.clear();
            for (Enumeration e = toAnalyze.keys(); e.hasMoreElements();) {
                String classname = (String) e.nextElement();
                dependencies.put(classname, classname);
                try {
                    File container = getClassContainer(classname);
                    if (container == null) {
                        continue;
                    }
                    containers.put(container, container);

                    ClassParser parser = null;
                    if (container.getName().endsWith(".class")) {
                        parser = new ClassParser(container.getPath());
                    } else {
                        parser = new ClassParser(container.getPath(),
                            classname.replace('.", '/") + ".class");
                    }

                    JavaClass javaClass = parser.parse();
                    String[] interfaces = javaClass.getInterfaceNames();
                    for (int i = 0; i < interfaces.length; ++i) {
                        String interfaceName = interfaces[i];
                        if (!dependencies.containsKey(interfaceName)) {
                            nextAnalyze.put(interfaceName, interfaceName);
                        }
                    }

                    if (javaClass.isClass()) {
                        String superClass = javaClass.getSuperclassName();
                        if (!dependencies.containsKey(superClass)) {
                            nextAnalyze.put(superClass, superClass);
                        }
                    }
                } catch (IOException ioe) {
                    // ignore
                }
            }

            Hashtable temp = toAnalyze;
            toAnalyze = nextAnalyze;
            nextAnalyze = temp;
        }

        files.removeAllElements();
        for (Enumeration e = containers.keys(); e.hasMoreElements();) {
            files.addElement((File) e.nextElement());
        }

        classes.removeAllElements();
        for (Enumeration e = dependencies.keys(); e.hasMoreElements();) {
            classes.addElement((String) e.nextElement());
        }
    
protected booleansupportsFileDependencies()
Indicate if this analyzer can determine dependent files.

return
true if the analyzer provides dependency file information.

        return true;