JDK 11 jdk.rmic.jmod is the JMOD file for JDK 11 RMI (Remote Method Invocation) Compiler Tool tool, which can be invoked by the "rmic" command.

JDK 11 RMI Compiler Tool tool compiled class files are stored in \fyicenter\jdk-11.0.1\jmods\jdk.rmic.jmod.

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JDK 11 RMI Compiler Tool tool source code files are stored in \fyicenter\jdk-11.0.1\lib\src.zip\jdk.rmic.

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⏎ sun/tools/java/Imports.java

/*
 * Copyright (c) 1994, 2003, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
 *
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 *
 *
 *
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 *
 *
 *
 */

package sun.tools.java;

import java.util.Hashtable;
import java.util.Vector;
import java.util.Enumeration;
import java.util.List;
import java.util.Collections;
import java.io.IOException;

/**
 * This class describes the classes and packages imported
 * from a source file. A Hashtable called bindings is maintained
 * to quickly map symbol names to classes. This table is flushed
 * everytime a new import is added.
 *
 * A class name is resolved as follows:
 *  - if it is a qualified name then return the corresponding class
 *  - if the name corresponds to an individually imported class then return that class
 *  - check if the class is defined in any of the imported packages,
 *    if it is then return it, make sure it is defined in only one package
 *  - assume that the class is defined in the current package
 *
 * WARNING: The contents of this source file are not part of any
 * supported API.  Code that depends on them does so at its own risk:
 * they are subject to change or removal without notice.
 */

public
class Imports implements Constants {
    /**
     * The current package, which is implicitly imported,
     * and has precedence over other imported packages.
     */
    Identifier currentPackage = idNull;

    /**
     * A location for the current package declaration.  Used to
     * report errors against the current package.
     */
    long currentPackageWhere = 0;

    /**
     * The imported classes, including memoized imports from packages.
     */
    Hashtable<Identifier, Identifier> classes = new Hashtable<>();

    /**
     * The imported package identifiers.  This will not contain duplicate
     * imports for the same package.  It will also not contain the
     * current package.
     */
    Vector<IdentifierToken> packages = new Vector<>();

    /**
     * The (originally) imported classes.
     * A vector of IdentifierToken.
     */
    Vector<IdentifierToken> singles = new Vector<>();

    /**
     * Are the import names checked yet?
     */
    protected int checked;

    /**
     * Constructor, always import java.lang.
     */
    public Imports(Environment env) {
        addPackage(idJavaLang);
    }

    /**
     * Check the names of the imports.
     */
    public synchronized void resolve(Environment env) {
        if (checked != 0) {
            return;
        }
        checked = -1;

        // After all class information has been read, now we can
        // safely inspect import information for errors.
        // If we did this before all parsing was finished,
        // we could get vicious circularities, since files can
        // import each others' classes.

        // A note: the resolution of the package java.lang takes place
        // in the sun.tools.javac.BatchEnvironment#setExemptPackages().

        // Make sure that the current package's name does not collide
        // with the name of an existing class. (bug 4101529)
        //
        // This change has been backed out because, on WIN32, it
        // failed to distinguish between java.awt.event and
        // java.awt.Event when looking for a directory.  We will
        // add this back in later.
        //
        // if (currentPackage != idNull) {
        //    Identifier resolvedName =
        //      env.resolvePackageQualifiedName(currentPackage);
        //
        //   Identifier className = resolvedName.getTopName();
        //
        //   if (importable(className, env)) {
        //      // The name of the current package is also the name
        //      // of a class.
        //      env.error(currentPackageWhere, "package.class.conflict",
        //                currentPackage, className);
        //     }
        // }

        Vector<IdentifierToken> resolvedPackages = new Vector<>();
        for (Enumeration<IdentifierToken> e = packages.elements() ; e.hasMoreElements() ;) {
            IdentifierToken t = e.nextElement();
            Identifier nm = t.getName();
            long where = t.getWhere();

            // Check to see if this package is exempt from the "exists"
            // check.  See the note in
            // sun.tools.javac.BatchEnvironment#setExemptPackages()
            // for more information.
            if (env.isExemptPackage(nm)) {
                resolvedPackages.addElement(t);
                continue;
            }

            // (Note: This code is moved from BatchParser.importPackage().)
            try {
                Identifier rnm = env.resolvePackageQualifiedName(nm);
                if (importable(rnm, env)) {
                    // This name is a real class; better not be a package too.
                    if (env.getPackage(rnm.getTopName()).exists()) {
                        env.error(where, "class.and.package",
                                  rnm.getTopName());
                    }
                    // Pass an "inner" name to the imports.
                    if (!rnm.isInner())
                        rnm = Identifier.lookupInner(rnm, idNull);
                    nm = rnm;
                } else if (!env.getPackage(nm).exists()) {
                    env.error(where, "package.not.found", nm, "import");
                } else if (rnm.isInner()) {
                    // nm exists, and rnm.getTopName() is a parent package
                    env.error(where, "class.and.package", rnm.getTopName());
                }
                resolvedPackages.addElement(new IdentifierToken(where, nm));
            } catch (IOException ee) {
                env.error(where, "io.exception", "import");
            }
        }
        packages = resolvedPackages;

        for (Enumeration<IdentifierToken> e = singles.elements() ; e.hasMoreElements() ;) {
            IdentifierToken t = e.nextElement();
            Identifier nm = t.getName();
            long where = t.getWhere();
            Identifier pkg = nm.getQualifier();

            // (Note: This code is moved from BatchParser.importClass().)
            nm = env.resolvePackageQualifiedName(nm);
            if (!env.classExists(nm.getTopName())) {
                env.error(where, "class.not.found", nm, "import");
            }

            // (Note: This code is moved from Imports.addClass().)
            Identifier snm = nm.getFlatName().getName();

            // make sure it isn't already imported explicitly
            Identifier className = classes.get(snm);
            if (className != null) {
                Identifier f1 = Identifier.lookup(className.getQualifier(),
                                                  className.getFlatName());
                Identifier f2 = Identifier.lookup(nm.getQualifier(),
                                                  nm.getFlatName());
                if (!f1.equals(f2)) {
                    env.error(where, "ambig.class", nm, className);
                }
            }
            classes.put(snm, nm);


            // The code here needs to check to see, if we
            // are importing an inner class, that all of its
            // enclosing classes are visible to us.  To check this,
            // we need to construct a definition for the class.
            // The code here used to call...
            //
            //     ClassDefinition def = env.getClassDefinition(nm);
            //
            // ...but that interfered with the basicCheck()'ing of
            // interfaces in certain cases (bug no. 4086139).  Never
            // fear.  Instead we load the class with a call to the
            // new getClassDefinitionNoCheck() which does no basicCheck() and
            // lets us answer the questions we are interested in w/o
            // interfering with the demand-driven nature of basicCheck().

            try {
                // Get a declaration
                ClassDeclaration decl = env.getClassDeclaration(nm);

                // Get the definition (no env argument)
                ClassDefinition def = decl.getClassDefinitionNoCheck(env);

                // Get the true name of the package containing this class.
                // `pkg' from above is insufficient.  It includes the
                // names of our enclosing classes.  Fix for 4086815.
                Identifier importedPackage = def.getName().getQualifier();

                // Walk out the outerClass chain, ensuring that each level
                // is visible from our perspective.
                for (; def != null; def = def.getOuterClass()) {
                    if (def.isPrivate()
                        || !(def.isPublic()
                             || importedPackage.equals(currentPackage))) {
                        env.error(where, "cant.access.class", def);
                        break;
                    }
                }
            } catch (AmbiguousClass ee) {
                env.error(where, "ambig.class", ee.name1, ee.name2);
            } catch (ClassNotFound ee) {
                env.error(where, "class.not.found", ee.name, "import");
            }
        }
        checked = 1;
    }

    /**
     * Lookup a class, given the current set of imports,
     * AmbiguousClass exception is thrown if the name can be
     * resolved in more than one way. A ClassNotFound exception
     * is thrown if the class is not found in the imported classes
     * and packages.
     */
    public synchronized Identifier resolve(Environment env, Identifier nm) throws ClassNotFound {
        if (tracing) env.dtEnter("Imports.resolve: " + nm);

        // If the class has the special ambiguous prefix, then we will
        // get the original AmbiguousClass exception by removing the
        // prefix and proceeding in the normal fashion.
        // (part of solution for 4059855)
        if (nm.hasAmbigPrefix()) {
            nm = nm.removeAmbigPrefix();
        }

        if (nm.isQualified()) {
            // Don't bother it is already qualified
            if (tracing) env.dtExit("Imports.resolve: QUALIFIED " + nm);
            return nm;
        }

        if (checked <= 0) {
            checked = 0;
            resolve(env);
        }

        // Check if it was imported before
        Identifier className = classes.get(nm);
        if (className != null) {
            if (tracing) env.dtExit("Imports.resolve: PREVIOUSLY IMPORTED " + nm);
            return className;
        }

        // Note: the section below has changed a bit during the fix
        // for bug 4093217.  The current package is no longer grouped
        // with the rest of the import-on-demands; it is now checked
        // separately.  Also, the list of import-on-demands is now
        // guarranteed to be duplicate-free, so the code below can afford
        // to be a bit simpler.

        // First we look in the current package.  The current package
        // is given precedence over the rest of the import-on-demands,
        // which means, among other things, that a class in the current
        // package cannot be ambiguous.
        Identifier id = Identifier.lookup(currentPackage, nm);
        if (importable(id, env)) {
            className = id;
        } else {
            // If it isn't in the current package, try to find it in
            // our import-on-demands.
            Enumeration<IdentifierToken> e = packages.elements();
            while (e.hasMoreElements()) {
                IdentifierToken t = e.nextElement();
                id = Identifier.lookup(t.getName(), nm);

                if (importable(id, env)) {
                    if (className == null) {
                        // We haven't found any other matching classes yet.
                        // Set className to what we've found and continue
                        // looking for an ambiguity.
                        className = id;
                    } else {
                        if (tracing)
                            env.dtExit("Imports.resolve: AMBIGUOUS " + nm);

                        // We've found an ambiguity.
                        throw new AmbiguousClass(className, id);
                    }
                }
            }
        }

        // Make sure a class was found
        if (className == null) {
            if (tracing) env.dtExit("Imports.resolve: NOT FOUND " + nm);
            throw new ClassNotFound(nm);
        }

        // Remember the binding
        classes.put(nm, className);
        if (tracing) env.dtExit("Imports.resolve: FIRST IMPORT " + nm);
        return className;
    }

    /**
     * Check to see if 'id' names an importable class in `env'.
     * This method was made public and static for utility.
     */
    static public boolean importable(Identifier id, Environment env) {
        if (!id.isInner()) {
            return env.classExists(id);
        } else if (!env.classExists(id.getTopName())) {
            return false;
        } else {
            // load the top class and look inside it
            try {
                // There used to be a call to...
                //    env.getClassDeclaration(id.getTopName());
                // ...here.  It has been replaced with the
                // two statements below.  These should be functionally
                // the same except for the fact that
                // getClassDefinitionNoCheck() does not call
                // basicCheck().  This allows us to avoid a circular
                // need to do basicChecking that can arise with
                // certain patterns of importing and inheritance.
                // This is a fix for a variant of bug 4086139.
                //
                // Note: the special case code in env.getClassDefinition()
                // which handles inner class names is not replicated below.
                // This should be okay, as we are looking up id.getTopName(),
                // not id.
                ClassDeclaration decl =
                    env.getClassDeclaration(id.getTopName());
                ClassDefinition c =
                    decl.getClassDefinitionNoCheck(env);

                return c.innerClassExists(id.getFlatName().getTail());
            } catch (ClassNotFound ee) {
                return false;
            }
        }
    }

    /**
     * Suppose a resolve() call has failed.
     * This routine can be used silently to give a reasonable
     * default qualification (the current package) to the identifier.
     * This decision is recorded for future reference.
     */
    public synchronized Identifier forceResolve(Environment env, Identifier nm) {
        if (nm.isQualified())
            return nm;

        Identifier className = classes.get(nm);
        if (className != null) {
            return className;
        }

        className = Identifier.lookup(currentPackage, nm);

        classes.put(nm, className);
        return className;
    }

    /**
     * Add a class import
     */
    public synchronized void addClass(IdentifierToken t) {
        singles.addElement(t);
    }
    // for compatibility
    public void addClass(Identifier nm) throws AmbiguousClass {
        addClass(new IdentifierToken(nm));
    }

    /**
     * Add a package import, or perhaps an inner class scope.
     * Ignore any duplicate imports.
     */
    public synchronized void addPackage(IdentifierToken t) {
        final Identifier name = t.getName();

        // If this is a duplicate import for the current package,
        // ignore it.
        if (name == currentPackage) {
            return;
        }

        // If this is a duplicate of a package which has already been
        // added to the list, ignore it.
        final int size = packages.size();
        for (int i = 0; i < size; i++) {
            if (name == (packages.elementAt(i)).getName()) {
                return;
            }
        }

        // Add the package to the list.
        packages.addElement(t);
    }
    // for compatibility
    public void addPackage(Identifier id) {
        addPackage(new IdentifierToken(id));
    }

    /**
     * Specify the current package with an IdentifierToken.
     */
    public synchronized void setCurrentPackage(IdentifierToken t) {
        currentPackage = t.getName();
        currentPackageWhere = t.getWhere();
    }

    /**
     * Specify the current package
     */
    public synchronized void setCurrentPackage(Identifier id) {
        currentPackage = id;
    }

    /**
     * Report the current package
     */
    public Identifier getCurrentPackage() {
        return currentPackage;
    }

    /**
     * Return an unmodifiable list of IdentifierToken representing
     * packages specified as imports.
     */
    public List<IdentifierToken> getImportedPackages() {
        return Collections.unmodifiableList(packages);
    }

    /**
     * Return an unmodifiable list of IdentifierToken representing
     * classes specified as imports.
     */
    public List<IdentifierToken> getImportedClasses() {
        return Collections.unmodifiableList(singles);
    }

    /**
     * Extend an environment with my resolve() method.
     */
    public Environment newEnvironment(Environment env) {
        return new ImportEnvironment(env, this);
    }
}

final
class ImportEnvironment extends Environment {
    Imports imports;

    ImportEnvironment(Environment env, Imports imports) {
        super(env, env.getSource());
        this.imports = imports;
    }

    public Identifier resolve(Identifier nm) throws ClassNotFound {
        return imports.resolve(this, nm);
    }

    public Imports getImports() {
        return imports;
    }
}

⏎ sun/tools/java/Imports.java

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Release date: 2018-11-04
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