https://openjdk.java.net/ 
/*
 * Copyright (c) 1997, 2015, 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.javadoc.main;

import java.io.IOException;
import java.io.InputStream;

import javax.tools.FileObject;

import com.sun.javadoc.*;
import com.sun.source.util.TreePath;
import com.sun.tools.javac.code.Attribute;
import com.sun.tools.javac.code.Symbol;
import com.sun.tools.javac.code.Symbol.ClassSymbol;
import com.sun.tools.javac.code.Symbol.PackageSymbol;
import com.sun.tools.javac.tree.JCTree;
import com.sun.tools.javac.tree.JCTree.JCCompilationUnit;
import com.sun.tools.javac.util.List;
import com.sun.tools.javac.util.ListBuffer;
import com.sun.tools.javac.util.Name;
import com.sun.tools.javac.util.Position;

import static com.sun.tools.javac.code.Scope.LookupKind.NON_RECURSIVE;


Represents a java package.  Provides access to information
about the package, the package's comment and tags, and the
classes in the package.
 
This is NOT part of any supported API.
 If you write code that depends on this, you do so at your own risk.
 This code and its internal interfaces are subject to change or
 deletion without notice.

Author:Kaiyang Liu (original), Robert Field (rewrite), Neal Gafter (rewrite), Scott Seligman (package-info.java)
Since:1.2
/**
 * Represents a java package.  Provides access to information
 * about the package, the package's comment and tags, and the
 * classes in the package.
 *
 *  <p><b>This is NOT part of any supported API.
 *  If you write code that depends on this, you do so at your own risk.
 *  This code and its internal interfaces are subject to change or
 *  deletion without notice.</b>
 *
 * @since 1.2
 * @author Kaiyang Liu (original)
 * @author Robert Field (rewrite)
 * @author Neal Gafter (rewrite)
 * @author Scott Seligman (package-info.java)
 */

@Deprecated
public class PackageDocImpl extends DocImpl implements PackageDoc {

    public final PackageSymbol sym;
    private JCCompilationUnit tree = null;    // for source position

    public FileObject docPath = null;
    private boolean foundDoc;   // found a doc comment in either
                                // package.html or package-info.java

    boolean isIncluded = false;  // Set in RootDocImpl.
    public boolean setDocPath = false;  //Flag to avoid setting doc path multiple times.

    
Constructor

/**
     * Constructor
     */
    public PackageDocImpl(DocEnv env, PackageSymbol sym) {
        this(env, sym, null);
    }

    
Constructor

/**
     * Constructor
     */
    public PackageDocImpl(DocEnv env, PackageSymbol sym, TreePath treePath) {
        super(env, treePath);
        this.sym = sym;
        this.tree = (treePath == null) ? null : (JCCompilationUnit) treePath.getCompilationUnit();
        foundDoc = (documentation != null);
    }

    void setTree(JCTree tree) {
        this.tree = (JCCompilationUnit) tree;
    }

    public void setTreePath(TreePath treePath) {
        super.setTreePath(treePath);
        checkDoc();
    }

    
Do lazy initialization of "documentation" string.

/**
     * Do lazy initialization of "documentation" string.
     */
    protected String documentation() {
        if (documentation != null)
            return documentation;
        if (docPath != null) {
            // read from file
            try {
                InputStream s = docPath.openInputStream();
                documentation = readHTMLDocumentation(s, docPath);
            } catch (IOException exc) {
                documentation = "";
                env.error(null, "javadoc.File_Read_Error", docPath.getName());
            }
        } else {
            // no doc file to be had
            documentation = "";
        }
        return documentation;
    }

    
Cache of all classes contained in this package, including
member classes of those classes, and their member classes, etc.
Includes only those classes at the specified protection level
and weaker.

/**
     * Cache of all classes contained in this package, including
     * member classes of those classes, and their member classes, etc.
     * Includes only those classes at the specified protection level
     * and weaker.
     */
    private List<ClassDocImpl> allClassesFiltered = null;

    
Cache of all classes contained in this package, including
member classes of those classes, and their member classes, etc.

/**
     * Cache of all classes contained in this package, including
     * member classes of those classes, and their member classes, etc.
     */
    private List<ClassDocImpl> allClasses = null;

    
Return a list of all classes contained in this package, including
member classes of those classes, and their member classes, etc.

/**
     * Return a list of all classes contained in this package, including
     * member classes of those classes, and their member classes, etc.
     */
    private List<ClassDocImpl> getClasses(boolean filtered) {
        if (allClasses != null && !filtered) {
            return allClasses;
        }
        if (allClassesFiltered != null && filtered) {
            return allClassesFiltered;
        }
        ListBuffer<ClassDocImpl> classes = new ListBuffer<>();
        for (Symbol enumerated : sym.members().getSymbols(NON_RECURSIVE)) {
            if (enumerated != null) {
                ClassSymbol s = (ClassSymbol)enumerated;
                ClassDocImpl c = env.getClassDoc(s);
                if (c != null && !c.isSynthetic())
                    c.addAllClasses(classes, filtered);
            }
        }
        if (filtered)
            return allClassesFiltered = classes.toList();
        else
            return allClasses = classes.toList();
    }

    
Add all included classes (including Exceptions and Errors)
and interfaces.

/**
     * Add all included classes (including Exceptions and Errors)
     * and interfaces.
     */
    public void addAllClassesTo(ListBuffer<ClassDocImpl> list) {
        list.appendList(getClasses(true));
    }

    
Get all classes (including Exceptions and Errors)
and interfaces.

Since:J2SE1.4.
Returns:all classes and interfaces in this package, filtered to include
only the included classes if filter==true.
/**
     * Get all classes (including Exceptions and Errors)
     * and interfaces.
     * @since J2SE1.4.
     *
     * @return all classes and interfaces in this package, filtered to include
     * only the included classes if filter==true.
     */
    public ClassDoc[] allClasses(boolean filter) {
        List<ClassDocImpl> classes = getClasses(filter);
        return classes.toArray(new ClassDocImpl[classes.length()]);
    }

    
Get all included classes (including Exceptions and Errors)
and interfaces.  Same as allClasses(true).

Returns:all included classes and interfaces in this package.
/**
     * Get all included classes (including Exceptions and Errors)
     * and interfaces.  Same as allClasses(true).
     *
     * @return all included classes and interfaces in this package.
     */
    public ClassDoc[] allClasses() {
        return allClasses(true);
    }

    
Get ordinary classes (that is, exclude exceptions, errors,
enums, interfaces, and annotation types) in this package.

Returns:included ordinary classes in this package.
/**
     * Get ordinary classes (that is, exclude exceptions, errors,
     * enums, interfaces, and annotation types) in this package.
     *
     * @return included ordinary classes in this package.
     */
    public ClassDoc[] ordinaryClasses() {
        ListBuffer<ClassDocImpl> ret = new ListBuffer<>();
        for (ClassDocImpl c : getClasses(true)) {
            if (c.isOrdinaryClass()) {
                ret.append(c);
            }
        }
        return ret.toArray(new ClassDocImpl[ret.length()]);
    }

    
Get Exception classes in this package.

Returns:included Exceptions in this package.
/**
     * Get Exception classes in this package.
     *
     * @return included Exceptions in this package.
     */
    public ClassDoc[] exceptions() {
        ListBuffer<ClassDocImpl> ret = new ListBuffer<>();
        for (ClassDocImpl c : getClasses(true)) {
            if (c.isException()) {
                ret.append(c);
            }
        }
        return ret.toArray(new ClassDocImpl[ret.length()]);
    }

    
Get Error classes in this package.

Returns:included Errors in this package.
/**
     * Get Error classes in this package.
     *
     * @return included Errors in this package.
     */
    public ClassDoc[] errors() {
        ListBuffer<ClassDocImpl> ret = new ListBuffer<>();
        for (ClassDocImpl c : getClasses(true)) {
            if (c.isError()) {
                ret.append(c);
            }
        }
        return ret.toArray(new ClassDocImpl[ret.length()]);
    }

    
Get included enum types in this package.

Returns:included enum types in this package.
/**
     * Get included enum types in this package.
     *
     * @return included enum types in this package.
     */
    public ClassDoc[] enums() {
        ListBuffer<ClassDocImpl> ret = new ListBuffer<>();
        for (ClassDocImpl c : getClasses(true)) {
            if (c.isEnum()) {
                ret.append(c);
            }
        }
        return ret.toArray(new ClassDocImpl[ret.length()]);
    }

    
Get included interfaces in this package, omitting annotation types.

Returns:included interfaces in this package.
/**
     * Get included interfaces in this package, omitting annotation types.
     *
     * @return included interfaces in this package.
     */
    public ClassDoc[] interfaces() {
        ListBuffer<ClassDocImpl> ret = new ListBuffer<>();
        for (ClassDocImpl c : getClasses(true)) {
            if (c.isInterface()) {
                ret.append(c);
            }
        }
        return ret.toArray(new ClassDocImpl[ret.length()]);
    }

    
Get included annotation types in this package.

Returns:included annotation types in this package.
/**
     * Get included annotation types in this package.
     *
     * @return included annotation types in this package.
     */
    public AnnotationTypeDoc[] annotationTypes() {
        ListBuffer<AnnotationTypeDocImpl> ret = new ListBuffer<>();
        for (ClassDocImpl c : getClasses(true)) {
            if (c.isAnnotationType()) {
                ret.append((AnnotationTypeDocImpl)c);
            }
        }
        return ret.toArray(new AnnotationTypeDocImpl[ret.length()]);
    }

    
Get the annotations of this package.
Return an empty array if there are none.

/**
     * Get the annotations of this package.
     * Return an empty array if there are none.
     */
    public AnnotationDesc[] annotations() {
        AnnotationDesc res[] = new AnnotationDesc[sym.getRawAttributes().length()];
        int i = 0;
        for (Attribute.Compound a : sym.getRawAttributes()) {
            res[i++] = new AnnotationDescImpl(env, a);
        }
        return res;
    }


    
Lookup for a class within this package.

Returns:ClassDocImpl of found class, or null if not found.
/**
     * Lookup for a class within this package.
     *
     * @return ClassDocImpl of found class, or null if not found.
     */
    public ClassDoc findClass(String className) {
        final boolean filtered = true;
        for (ClassDocImpl c : getClasses(filtered)) {
            if (c.name().equals(className)) {
                return c;
            }
        }
        return null;
    }

    
Return true if this package is included in the active set.

/**
     * Return true if this package is included in the active set.
     */
    public boolean isIncluded() {
        return isIncluded;
    }

    
Get package name.
Note that we do not provide a means of obtaining the simple
name of a package -- package names are always returned in their
uniquely qualified form.

/**
     * Get package name.
     *
     * Note that we do not provide a means of obtaining the simple
     * name of a package -- package names are always returned in their
     * uniquely qualified form.
     */
    public String name() {
        return qualifiedName();
    }

    
Get package name.

/**
     * Get package name.
     */
    public String qualifiedName() {
        if (qualifiedName == null) {
            Name fullname = sym.getQualifiedName();
            // Some bogus tests depend on the interned "" being returned.
            // See 6457276.
            qualifiedName = fullname.isEmpty() ? "" : fullname.toString();
        }
        return qualifiedName;
    }

    private String qualifiedName;

    
set doc path for an unzipped directory

/**
     * set doc path for an unzipped directory
     */
    public void setDocPath(FileObject path) {
        setDocPath = true;
        if (path == null)
            return;
        if (!path.equals(docPath)) {
            docPath = path;
            checkDoc();
        }
    }

    // Has checkDoc() sounded off yet?
    private boolean checkDocWarningEmitted = false;

    
Invoked when a source of package doc comments is located.
Emits a diagnostic if this is the second one.

/**
     * Invoked when a source of package doc comments is located.
     * Emits a diagnostic if this is the second one.
     */
    private void checkDoc() {
        if (foundDoc) {
            if (!checkDocWarningEmitted) {
                env.warning(null, "javadoc.Multiple_package_comments", name());
                checkDocWarningEmitted = true;
            }
        } else {
            foundDoc = true;
        }
    }

    
Return the source position of the entity, or null if
no position is available.

/**
     * Return the source position of the entity, or null if
     * no position is available.
     */
    public SourcePosition position() {
        return (tree != null)
                ? SourcePositionImpl.make(tree.sourcefile, tree.pos, tree.lineMap)
                : SourcePositionImpl.make(docPath, Position.NOPOS, null);
    }
}