jdk8-mips64-public/langtools: src/share/classes/com/sun/tools/classfile/Dependencies.java@9a7c998bf2fc (annotated)

src/share/classes/com/sun/tools/classfile/Dependencies.java@9a7c998bf2fc (annotated)

src/share/classes/com/sun/tools/classfile/Dependencies.java

Wed, 02 Jun 2010 19:08:47 -0700

author: darcy
date: Wed, 02 Jun 2010 19:08:47 -0700
changeset 575: 9a7c998bf2fc
parent 554: 9d9f26857129
child 826: 5cf6c432ef2f
permissions: -rw-r--r--

6933147: Provided new utility visitors supporting SourceVersion.RELEASE_7
Reviewed-by: jjg

 /*
  * Copyright (c) 2009, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.  Oracle designates this
  * particular file as subject to the "Classpath" exception as provided
  * by Oracle in the LICENSE file that accompanied this code.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  */
 package com.sun.tools.classfile;
 import java.util.Deque;
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
 import java.util.regex.Pattern;
 import com.sun.tools.classfile.Dependency.Finder;
 import com.sun.tools.classfile.Dependency.Filter;
 import com.sun.tools.classfile.Dependency.Location;
 import com.sun.tools.classfile.Type.ArrayType;
 import com.sun.tools.classfile.Type.ClassSigType;
 import com.sun.tools.classfile.Type.ClassType;
 import com.sun.tools.classfile.Type.MethodType;
 import com.sun.tools.classfile.Type.SimpleType;
 import com.sun.tools.classfile.Type.TypeParamType;
 import com.sun.tools.classfile.Type.WildcardType;
 import static com.sun.tools.classfile.ConstantPool.*;
 /**
  * A framework for determining {@link Dependency dependencies} between class files.
  *
  * A {@link Dependency.Finder finder} is used to identify the dependencies of
  * individual classes. Some finders may return subtypes of {@code Dependency} to
  * further characterize the type of dependency, such as a dependency on a
  * method within a class.
  *
  * A {@link Dependency.Filter filter} may be used to restrict the set of
  * dependencies found by a finder.
  *
  * Dependencies that are found may be passed to a {@link Dependencies.Recorder
  * recorder} so that the dependencies can be stored in a custom data structure.
  */
 public class Dependencies {
     /**
      * Thrown when a class file cannot be found.
      */
     public static class ClassFileNotFoundException extends Exception {
         private static final long serialVersionUID = 3632265927794475048L;
         public ClassFileNotFoundException(String className) {
             super(className);
             this.className = className;
         }
         public ClassFileNotFoundException(String className, Throwable cause) {
             this(className);
             initCause(cause);
         }
         public final String className;
     }
     /**
      * Thrown when an exception is found processing a class file.
      */
     public static class ClassFileError extends Error {
         private static final long serialVersionUID = 4111110813961313203L;
         public ClassFileError(Throwable cause) {
             initCause(cause);
         }
     }
     /**
      * Service provider interface to locate and read class files.
      */
     public interface ClassFileReader {
         /**
          * Get the ClassFile object for a specified class.
          * @param className the name of the class to be returned.
          * @return the ClassFile for the given class
          * @throws Dependencies#ClassFileNotFoundException if the classfile cannot be
          *   found
          */
         public ClassFile getClassFile(String className)
                 throws ClassFileNotFoundException;
     }
     /**
      * Service provide interface to handle results.
      */
     public interface Recorder {
         /**
          * Record a dependency that has been found.
          * @param d
          */
         public void addDependency(Dependency d);
     }
     /**
      * Get the  default finder used to locate the dependencies for a class.
      * @return the default finder
      */
     public static Finder getDefaultFinder() {
         return new APIDependencyFinder(AccessFlags.ACC_PRIVATE);
     }
     /**
      * Get a finder used to locate the API dependencies for a class.
      * These include the superclass, superinterfaces, and classes referenced in
      * the declarations of fields and methods.  The fields and methods that
      * are checked can be limited according to a specified access.
      * The access parameter must be one of {@link AccessFlags#ACC_PUBLIC ACC_PUBLIC},
      * {@link AccessFlags#ACC_PRIVATE ACC_PRIVATE},
      * {@link AccessFlags#ACC_PROTECTED ACC_PROTECTED}, or 0 for
      * package private access. Members with greater than or equal accessibility
      * to that specified will be searched for dependencies.
      * @param access the access of members to be checked
      * @return an API finder
      */
     public static Finder getAPIFinder(int access) {
         return new APIDependencyFinder(access);
     }
     /**
      * Get the finder used to locate the dependencies for a class.
      * @return the finder
      */
     public Finder getFinder() {
         if (finder == null)
             finder = getDefaultFinder();
         return finder;
     }
     /**
      * Set the finder used to locate the dependencies for a class.
      * @param f the finder
      */
     public void setFinder(Finder f) {
         f.getClass(); // null check
         finder = f;
     }
     /**
      * Get the default filter used to determine included when searching
      * the transitive closure of all the dependencies.
      * Unless overridden, the default filter accepts all dependencies.
      * @return the default filter.
      */
     public static Filter getDefaultFilter() {
         return DefaultFilter.instance();
     }
     /**
      * Get a filter which uses a regular expression on the target's class name
      * to determine if a dependency is of interest.
      * @param pattern the pattern used to match the target's class name
      * @return a filter for matching the target class name with a regular expression
      */
     public static Filter getRegexFilter(Pattern pattern) {
         return new TargetRegexFilter(pattern);
     }
     /**
      * Get a filter which checks the package of a target's class name
      * to determine if a dependency is of interest. The filter checks if the
      * package of the target's class matches any of a set of given package
      * names. The match may optionally match subpackages of the given names as well.
      * @param packageNames the package names used to match the target's class name
      * @param matchSubpackages whether or not to match subpackages as well
      * @return a filter for checking the target package name against a list of package names
      */
     public static Filter getPackageFilter(Set<String> packageNames, boolean matchSubpackages) {
         return new TargetPackageFilter(packageNames, matchSubpackages);
     }
     /**
      * Get the filter used to determine the dependencies included when searching
      * the transitive closure of all the dependencies.
      * Unless overridden, the default filter accepts all dependencies.
      * @return the filter
      */
     public Filter getFilter() {
         if (filter == null)
             filter = getDefaultFilter();
         return filter;
     }
     /**
      * Set the filter used to determine the dependencies included when searching
      * the transitive closure of all the dependencies.
      * @param f the filter
      */
     public void setFilter(Filter f) {
         f.getClass(); // null check
         filter = f;
     }
     /**
      * Find the dependencies of a class, using the current
      * {@link Dependencies#getFinder finder} and
      * {@link Dependencies#getFilter filter}.
      * The search may optionally include the transitive closure of all the
      * filtered dependencies, by also searching in the classes named in those
      * dependencies.
      * @param classFinder a finder to locate class files
      * @param rootClassNames the names of the root classes from which to begin
      *      searching
      * @param transitiveClosure whether or not to also search those classes
      *      named in any filtered dependencies that are found.
      * @return the set of dependencies that were found
      * @throws ClassFileNotFoundException if a required class file cannot be found
      * @throws ClassFileError if an error occurs while processing a class file,
      *      such as an error in the internal class file structure.
      */
     public Set<Dependency> findAllDependencies(
             ClassFileReader classFinder, Set<String> rootClassNames,
             boolean transitiveClosure)
             throws ClassFileNotFoundException {
         final Set<Dependency> results = new HashSet<Dependency>();
         Recorder r = new Recorder() {
             public void addDependency(Dependency d) {
                 results.add(d);
             }
         };
         findAllDependencies(classFinder, rootClassNames, transitiveClosure, r);
         return results;
     }
     /**
      * Find the dependencies of a class, using the current
      * {@link Dependencies#getFinder finder} and
      * {@link Dependencies#getFilter filter}.
      * The search may optionally include the transitive closure of all the
      * filtered dependencies, by also searching in the classes named in those
      * dependencies.
      * @param classFinder a finder to locate class files
      * @param rootClassNames the names of the root classes from which to begin
      *      searching
      * @param transitiveClosure whether or not to also search those classes
      *      named in any filtered dependencies that are found.
      * @param recorder a recorder for handling the results
      * @throws ClassFileNotFoundException if a required class file cannot be found
      * @throws ClassFileError if an error occurs while processing a class file,
      *      such as an error in the internal class file structure.
      */
     public void findAllDependencies(
             ClassFileReader classFinder, Set<String> rootClassNames,
             boolean transitiveClosure, Recorder recorder)
             throws ClassFileNotFoundException {
         Set<String> doneClasses = new HashSet<String>();
         getFinder();  // ensure initialized
         getFilter();  // ensure initialized
         // Work queue of names of classfiles to be searched.
         // Entries will be unique, and for classes that do not yet have
         // dependencies in the results map.
         Deque<String> deque = new LinkedList<String>(rootClassNames);
         String className;
         while ((className = deque.poll()) != null) {
             assert (!doneClasses.contains(className));
             doneClasses.add(className);
             ClassFile cf = classFinder.getClassFile(className);
             // The following code just applies the filter to the dependencies
             // followed for the transitive closure.
             for (Dependency d: finder.findDependencies(cf)) {
                 recorder.addDependency(d);
                 if (transitiveClosure && filter.accepts(d)) {
                     String cn = d.getTarget().getClassName();
                     if (!doneClasses.contains(cn))
                         deque.add(cn);
                 }
             }
         }
     }
     private Filter filter;
     private Finder finder;
     /**
      * A location identifying a class.
      */
     static class SimpleLocation implements Location {
         public SimpleLocation(String className) {
             this.className = className;
         }
         /**
          * Get the name of the class being depended on. This name will be used to
          * locate the class file for transitive dependency analysis.
          * @return the name of the class being depended on
          */
         public String getClassName() {
             return className;
         }
         @Override
         public boolean equals(Object other) {
             if (this == other)
                 return true;
             if (!(other instanceof SimpleLocation))
                 return false;
             return (className.equals(((SimpleLocation) other).className));
         }
         @Override
         public int hashCode() {
             return className.hashCode();
         }
         @Override
         public String toString() {
             return className;
         }
         private String className;
     }
     /**
      * A dependency of one class on another.
      */
     static class SimpleDependency implements Dependency {
         public SimpleDependency(Location origin, Location target) {
             this.origin = origin;
             this.target = target;
         }
         public Location getOrigin() {
             return origin;
         }
         public Location getTarget() {
             return target;
         }
         @Override
         public boolean equals(Object other) {
             if (this == other)
                 return true;
             if (!(other instanceof SimpleDependency))
                 return false;
             SimpleDependency o = (SimpleDependency) other;
             return (origin.equals(o.origin) && target.equals(o.target));
         }
         @Override
         public int hashCode() {
             return origin.hashCode() * 31 + target.hashCode();
         }
         @Override
         public String toString() {
             return origin + ":" + target;
         }
         private Location origin;
         private Location target;
     }
     /**
      * This class accepts all dependencies.
      */
     static class DefaultFilter implements Filter {
         private static DefaultFilter instance;
         static DefaultFilter instance() {
             if (instance == null)
                 instance = new DefaultFilter();
             return instance;
         }
         public boolean accepts(Dependency dependency) {
             return true;
         }
     }
     /**
      * This class accepts those dependencies whose target's class name matches a
      * regular expression.
      */
     static class TargetRegexFilter implements Filter {
         TargetRegexFilter(Pattern pattern) {
             this.pattern = pattern;
         }
         public boolean accepts(Dependency dependency) {
             return pattern.matcher(dependency.getTarget().getClassName()).matches();
         }
         private final Pattern pattern;
     }
     /**
      * This class accepts those dependencies whose class name is in a given
      * package.
      */
     static class TargetPackageFilter implements Filter {
         TargetPackageFilter(Set<String> packageNames, boolean matchSubpackages) {
             for (String pn: packageNames) {
                 if (pn.length() == 0) // implies null check as well
                     throw new IllegalArgumentException();
             }
             this.packageNames = packageNames;
             this.matchSubpackages = matchSubpackages;
         }
         public boolean accepts(Dependency dependency) {
             String cn = dependency.getTarget().getClassName();
             int lastSep = cn.lastIndexOf("/");
             String pn = (lastSep == -1 ? "" : cn.substring(0, lastSep));
             if (packageNames.contains(pn))
                 return true;
             if (matchSubpackages) {
                 for (String n: packageNames) {
                     if (pn.startsWith(n + "."))
                         return true;
                 }
             }
             return false;
         }
         private final Set<String> packageNames;
         private final boolean matchSubpackages;
     }
     /**
      * This class identifies class names directly or indirectly in the constant pool.
      */
     static class ClassDependencyFinder extends BasicDependencyFinder {
         public Iterable<? extends Dependency> findDependencies(ClassFile classfile) {
             Visitor v = new Visitor(classfile);
             for (CPInfo cpInfo: classfile.constant_pool.entries()) {
                 v.scan(cpInfo);
             }
             return v.deps;
         }
     }
     /**
      * This class identifies class names in the signatures of classes, fields,
      * and methods in a class.
      */
     static class APIDependencyFinder extends BasicDependencyFinder {
         APIDependencyFinder(int access) {
             switch (access) {
                 case AccessFlags.ACC_PUBLIC:
                 case AccessFlags.ACC_PROTECTED:
                 case AccessFlags.ACC_PRIVATE:
                 case 0:
                     showAccess = access;
                     break;
                 default:
                     throw new IllegalArgumentException("invalid access 0x"
                             + Integer.toHexString(access));
             }
         }
         public Iterable<? extends Dependency> findDependencies(ClassFile classfile) {
             try {
                 Visitor v = new Visitor(classfile);
                 v.addClass(classfile.super_class);
                 v.addClasses(classfile.interfaces);
                 // inner classes?
                 for (Field f : classfile.fields) {
                     if (checkAccess(f.access_flags))
                         v.scan(f.descriptor, f.attributes);
                 }
                 for (Method m : classfile.methods) {
                     if (checkAccess(m.access_flags)) {
                         v.scan(m.descriptor, m.attributes);
                         Exceptions_attribute e =
                                 (Exceptions_attribute) m.attributes.get(Attribute.Exceptions);
                         if (e != null)
                             v.addClasses(e.exception_index_table);
                     }
                 }
                 return v.deps;
             } catch (ConstantPoolException e) {
                 throw new ClassFileError(e);
             }
         }
         boolean checkAccess(AccessFlags flags) {
             // code copied from javap.Options.checkAccess
             boolean isPublic = flags.is(AccessFlags.ACC_PUBLIC);
             boolean isProtected = flags.is(AccessFlags.ACC_PROTECTED);
             boolean isPrivate = flags.is(AccessFlags.ACC_PRIVATE);
             boolean isPackage = !(isPublic || isProtected || isPrivate);
             if ((showAccess == AccessFlags.ACC_PUBLIC) && (isProtected || isPrivate || isPackage))
                 return false;
             else if ((showAccess == AccessFlags.ACC_PROTECTED) && (isPrivate || isPackage))
                 return false;
             else if ((showAccess == 0) && (isPrivate))
                 return false;
             else
                 return true;
         }
         private int showAccess;
     }
     static abstract class BasicDependencyFinder implements Finder {
         private Map<String,Location> locations = new HashMap<String,Location>();
         Location getLocation(String className) {
             Location l = locations.get(className);
             if (l == null)
                 locations.put(className, l = new SimpleLocation(className));
             return l;
         }
         class Visitor implements ConstantPool.Visitor<Void,Void>, Type.Visitor<Void, Void> {
             private ConstantPool constant_pool;
             private Location origin;
             Set<Dependency> deps;
             Visitor(ClassFile classFile) {
                 try {
                     constant_pool = classFile.constant_pool;
                     origin = getLocation(classFile.getName());
                     deps = new HashSet<Dependency>();
                 } catch (ConstantPoolException e) {
                     throw new ClassFileError(e);
                 }
             }
             void scan(Descriptor d, Attributes attrs) {
                 try {
                     scan(new Signature(d.index).getType(constant_pool));
                     Signature_attribute sa = (Signature_attribute) attrs.get(Attribute.Signature);
                     if (sa != null)
                         scan(new Signature(sa.signature_index).getType(constant_pool));
                 } catch (ConstantPoolException e) {
                     throw new ClassFileError(e);
                 }
             }
             void scan(CPInfo cpInfo) {
                 cpInfo.accept(this, null);
             }
             void scan(Type t) {
                 t.accept(this, null);
             }
             void addClass(int index) throws ConstantPoolException {
                 if (index != 0) {
                     String name = constant_pool.getClassInfo(index).getBaseName();
                     if (name != null)
                         addDependency(name);
                 }
             }
             void addClasses(int[] indices) throws ConstantPoolException {
                 for (int i: indices)
                     addClass(i);
             }
             private void addDependency(String name) {
                 deps.add(new SimpleDependency(origin, getLocation(name)));
             }
             // ConstantPool.Visitor methods
             public Void visitClass(CONSTANT_Class_info info, Void p) {
                 try {
                     if (info.getName().startsWith("["))
                         new Signature(info.name_index).getType(constant_pool).accept(this, null);
                     else
                         addDependency(info.getBaseName());
                     return null;
                 } catch (ConstantPoolException e) {
                     throw new ClassFileError(e);
                 }
             }
             public Void visitDouble(CONSTANT_Double_info info, Void p) {
                 return null;
             }
             public Void visitFieldref(CONSTANT_Fieldref_info info, Void p) {
                 return visitRef(info, p);
             }
             public Void visitFloat(CONSTANT_Float_info info, Void p) {
                 return null;
             }
             public Void visitInteger(CONSTANT_Integer_info info, Void p) {
                 return null;
             }
             public Void visitInterfaceMethodref(CONSTANT_InterfaceMethodref_info info, Void p) {
                 return visitRef(info, p);
             }
             public Void visitLong(CONSTANT_Long_info info, Void p) {
                 return null;
             }
             public Void visitNameAndType(CONSTANT_NameAndType_info info, Void p) {
                 try {
                     new Signature(info.type_index).getType(constant_pool).accept(this, null);
                     return null;
                 } catch (ConstantPoolException e) {
                     throw new ClassFileError(e);
                 }
             }
             public Void visitMethodref(CONSTANT_Methodref_info info, Void p) {
                 return visitRef(info, p);
             }
             public Void visitString(CONSTANT_String_info info, Void p) {
                 return null;
             }
             public Void visitUtf8(CONSTANT_Utf8_info info, Void p) {
                 return null;
             }
             private Void visitRef(CPRefInfo info, Void p) {
                 try {
                     visitClass(info.getClassInfo(), p);
                     return null;
                 } catch (ConstantPoolException e) {
                     throw new ClassFileError(e);
                 }
             }
             // Type.Visitor methods
             private void findDependencies(Type t) {
                 if (t != null)
                     t.accept(this, null);
             }
             private void findDependencies(List<? extends Type> ts) {
                 if (ts != null) {
                     for (Type t: ts)
                         t.accept(this, null);
                 }
             }
             public Void visitSimpleType(SimpleType type, Void p) {
                 return null;
             }
             public Void visitArrayType(ArrayType type, Void p) {
                 findDependencies(type.elemType);
                 return null;
             }
             public Void visitMethodType(MethodType type, Void p) {
                 findDependencies(type.paramTypes);
                 findDependencies(type.returnType);
                 findDependencies(type.throwsTypes);
                 return null;
             }
             public Void visitClassSigType(ClassSigType type, Void p) {
                 findDependencies(type.superclassType);
                 findDependencies(type.superinterfaceTypes);
                 return null;
             }
             public Void visitClassType(ClassType type, Void p) {
                 findDependencies(type.outerType);
                 addDependency(type.name);
                 findDependencies(type.typeArgs);
                 return null;
             }
             public Void visitTypeParamType(TypeParamType type, Void p) {
                 findDependencies(type.classBound);
                 findDependencies(type.interfaceBounds);
                 return null;
             }
             public Void visitWildcardType(WildcardType type, Void p) {
                 findDependencies(type.boundType);
                 return null;
             }
         }
     }
 }

Mercurial > jdk8-mips64-public > langtools / annotate

src/share/classes/com/sun/tools/classfile/Dependencies.java@9a7c998bf2fc (annotated)

src/share/classes/com/sun/tools/classfile/Dependencies.java