https://openjdk.java.net/ 
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 * Copyright (c) 1997, 2018, 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
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package com.sun.tools.javadoc.main;

import java.lang.reflect.Modifier;

import com.sun.javadoc.*;
import com.sun.source.util.TreePath;
import com.sun.tools.javac.code.*;
import com.sun.tools.javac.code.Symbol.*;
import com.sun.tools.javac.code.Type;
import static com.sun.tools.javac.code.TypeTag.CLASS;


Represents a method of a java class.
 
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:Robert Field, Neal Gafter (rewrite)
Since:1.2
/**
 * Represents a method of a java class.
 *
 *  <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 Robert Field
 * @author Neal Gafter (rewrite)
 */

@Deprecated(since="9", forRemoval=true)
@SuppressWarnings("removal")
public class MethodDocImpl
        extends ExecutableMemberDocImpl implements MethodDoc {

    
constructor.

/**
     * constructor.
     */
    public MethodDocImpl(DocEnv env, MethodSymbol sym) {
        super(env, sym);
    }

    
constructor.

/**
     * constructor.
     */
    public MethodDocImpl(DocEnv env, MethodSymbol sym, TreePath treePath) {
        super(env, sym, treePath);
    }

    
Return true if it is a method, which it is.
Note: constructors are not methods.
This method is overridden by AnnotationTypeElementDocImpl.

Returns:true
/**
     * Return true if it is a method, which it is.
     * Note: constructors are not methods.
     * This method is overridden by AnnotationTypeElementDocImpl.
     *
     * @return true
     */
    public boolean isMethod() {
        return true;
    }

    
Return true if this method is default

/**
     * Return true if this method is default
     */
    public boolean isDefault() {
        return (sym.flags() & Flags.DEFAULT) != 0;
    }

    
Return true if this method is abstract

/**
     * Return true if this method is abstract
     */
    public boolean isAbstract() {
        return (Modifier.isAbstract(getModifiers()) && !isDefault());
    }

    
Get return type.

Returns:the return type of this method, null if it
is a constructor.
/**
     * Get return type.
     *
     * @return the return type of this method, null if it
     * is a constructor.
     */
    public com.sun.javadoc.Type returnType() {
        return TypeMaker.getType(env, sym.type.getReturnType(), false);
    }

    
Return the class that originally defined the method that
is overridden by the current definition, or null if no
such class exists.

Returns:a ClassDocImpl representing the superclass that
originally defined this method, null if this method does
not override a definition in a superclass.
/**
     * Return the class that originally defined the method that
     * is overridden by the current definition, or null if no
     * such class exists.
     *
     * @return a ClassDocImpl representing the superclass that
     * originally defined this method, null if this method does
     * not override a definition in a superclass.
     */
    public ClassDoc overriddenClass() {
        com.sun.javadoc.Type t = overriddenType();
        return (t != null) ? t.asClassDoc() : null;
    }

    
Return the type containing the method that this method overrides.
It may be a ClassDoc or a ParameterizedType.

/**
     * Return the type containing the method that this method overrides.
     * It may be a <code>ClassDoc</code> or a <code>ParameterizedType</code>.
     */
    public com.sun.javadoc.Type overriddenType() {

        if ((sym.flags() & Flags.STATIC) != 0) {
            return null;
        }

        ClassSymbol origin = (ClassSymbol)sym.owner;
        for (Type t = env.types.supertype(origin.type);
             t.hasTag(CLASS);
             t = env.types.supertype(t)) {
            ClassSymbol c = (ClassSymbol)t.tsym;
            for (Symbol sym2 : membersOf(c).getSymbolsByName(sym.name)) {
                if (sym.overrides(sym2, origin, env.types, true)) {
                    return TypeMaker.getType(env, t);
                }
            }
        }
        return null;
    }

    
Return the method that this method overrides.

Returns:a MethodDoc representing a method definition
in a superclass this method overrides, null if
this method does not override.
/**
     * Return the method that this method overrides.
     *
     * @return a MethodDoc representing a method definition
     * in a superclass this method overrides, null if
     * this method does not override.
     */
    public MethodDoc overriddenMethod() {

        // Real overriding only.  Static members are simply hidden.
        // Likewise for constructors, but the MethodSymbol.overrides
        // method takes this into account.
        if ((sym.flags() & Flags.STATIC) != 0) {
            return null;
        }

        // Derived from  com.sun.tools.javac.comp.Check.checkOverride .

        ClassSymbol origin = (ClassSymbol)sym.owner;
        for (Type t = env.types.supertype(origin.type);
             t.hasTag(CLASS);
             t = env.types.supertype(t)) {
            ClassSymbol c = (ClassSymbol)t.tsym;
            for (Symbol sym2 : membersOf(c).getSymbolsByName(sym.name)) {
                if (sym.overrides(sym2, origin, env.types, true)) {
                    return env.getMethodDoc((MethodSymbol)sym2);
                }
            }
        }
        return null;
    }

    
Retrieve members of c, ignoring any CompletionFailures that occur. 
/**Retrieve members of c, ignoring any CompletionFailures that occur. */
    private Scope membersOf(ClassSymbol c) {
        try {
            return c.members();
        } catch (CompletionFailure cf) {
            /* Quietly ignore completion failures and try again - the type
             * for which the CompletionFailure was thrown shouldn't be completed
             * again by the completer that threw the CompletionFailure.
             */
            return membersOf(c);
        }
    }

    
Tests whether this method overrides another. The overridden method may be one declared in a superclass or a superinterface (unlike overriddenMethod()). 
 When a non-abstract method overrides an abstract one, it is
also said to implement the other.

Params:
  • meth –  the other method to examine
Returns:true if this method overrides the other
/**
     * Tests whether this method overrides another.
     * The overridden method may be one declared in a superclass or
     * a superinterface (unlike {@link #overriddenMethod()}).
     *
     * <p> When a non-abstract method overrides an abstract one, it is
     * also said to <i>implement</i> the other.
     *
     * @param meth  the other method to examine
     * @return <tt>true</tt> if this method overrides the other
     */
    public boolean overrides(MethodDoc meth) {
        MethodSymbol overridee = ((MethodDocImpl) meth).sym;
        ClassSymbol origin = (ClassSymbol) sym.owner;

        return sym.name == overridee.name &&

               // not reflexive as per JLS
               sym != overridee &&

               // we don't care if overridee is static, though that wouldn't
               // compile
               !sym.isStatic() &&

               // sym, whose declaring type is the origin, must be
               // in a subtype of overridee's type
               env.types.asSuper(origin.type, overridee.owner) != null &&

               // check access and signatures; don't check return types
               sym.overrides(overridee, origin, env.types, false);
    }


    public String name() {
        if (name == null) {
            name = sym.name.toString();
        }
        return name;
    }

    private String name;

    public String qualifiedName() {
        if (qualifiedName == null) {
            qualifiedName =  sym.enclClass().getQualifiedName() + "." + sym.name;
        }
        return qualifiedName;
    }

    private String qualifiedName;

    
Returns a string representation of this method.  Includes the
qualified signature, the qualified method name, and any type
parameters.  Type parameters follow the class name, as they do
in the syntax for invoking methods with explicit type parameters.

/**
     * Returns a string representation of this method.  Includes the
     * qualified signature, the qualified method name, and any type
     * parameters.  Type parameters follow the class name, as they do
     * in the syntax for invoking methods with explicit type parameters.
     */
    public String toString() {
        return sym.enclClass().getQualifiedName() +
                "." + typeParametersString() + name() + signature();
    }
}