Java example source code file (ParameterizedTypeImpl.java)

This example Java source code file (ParameterizedTypeImpl.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

abstracttypeimpl, classdoc, classsymbol, classtype, javadoc, override, parameterizedtypeimpl, string, stringbuilder

The ParameterizedTypeImpl.java Java example source code

/*
 * Copyright (c) 2003, 2012, 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;

import com.sun.javadoc.*;

import com.sun.tools.javac.code.Symbol.ClassSymbol;
import com.sun.tools.javac.code.Type;
import com.sun.tools.javac.code.Type.ClassType;

import static com.sun.tools.javac.code.TypeTag.CLASS;


/**
 * Implementation of <code>ParameterizedType, which
 * represents an invocation of a generic class or interface.
 *
 *  <p>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>
 *
 * @author Scott Seligman
 * @since 1.5
 */
public class ParameterizedTypeImpl
        extends AbstractTypeImpl implements ParameterizedType {

    ParameterizedTypeImpl(DocEnv env, Type type) {
        super(env, type);
    }

    /**
     * Return the generic class or interface that declared this type.
     */
    @Override
    public ClassDoc asClassDoc() {
        return env.getClassDoc((ClassSymbol)type.tsym);
    }

    /**
     * Return the actual type arguments of this type.
     */
    public com.sun.javadoc.Type[] typeArguments() {
        return TypeMaker.getTypes(env, type.getTypeArguments());
    }

    /**
     * Return the class type that is a direct supertype of this one.
     * Return null if this is an interface type.
     */
    public com.sun.javadoc.Type superclassType() {
        if (asClassDoc().isInterface()) {
            return null;
        }
        Type sup = env.types.supertype(type);
        return TypeMaker.getType(env,
                                 (sup != type) ? sup : env.syms.objectType);
    }

    /**
     * Return the interface types directly implemented by or extended by this
     * parameterized type.
     * Return an empty array if there are no interfaces.
     */
    public com.sun.javadoc.Type[] interfaceTypes() {
        return TypeMaker.getTypes(env, env.types.interfaces(type));
    }

    /**
     * Return the type that contains this type as a member.
     * Return null is this is a top-level type.
     */
    public com.sun.javadoc.Type containingType() {
        if (type.getEnclosingType().hasTag(CLASS)) {
            // This is the type of an inner class.
            return TypeMaker.getType(env, type.getEnclosingType());
        }
        ClassSymbol enclosing = type.tsym.owner.enclClass();
        if (enclosing != null) {
            // Nested but not inner.  Return the ClassDoc of the enclosing
            // class or interface.
            // See java.lang.reflect.ParameterizedType.getOwnerType().
            return env.getClassDoc(enclosing);
        }
        return null;
    }


    // Asking for the "name" of a parameterized type doesn't exactly make
    // sense.  It's a type expression.  Return the name of its generic
    // type.
    @Override
    public String typeName() {
        return TypeMaker.getTypeName(type, false);
    }

    @Override
    public ParameterizedType asParameterizedType() {
        return this;
    }

    @Override
    public String toString() {
        return parameterizedTypeToString(env, (ClassType)type, true);
    }

    static String parameterizedTypeToString(DocEnv env, ClassType cl,
                                            boolean full) {
        if (env.legacyDoclet) {
            return TypeMaker.getTypeName(cl, full);
        }
        StringBuilder s = new StringBuilder();
        if (!(cl.getEnclosingType().hasTag(CLASS))) {               // if not an inner class...
            s.append(TypeMaker.getTypeName(cl, full));
        } else {
            ClassType encl = (ClassType)cl.getEnclosingType();
            s.append(parameterizedTypeToString(env, encl, full))
             .append('.')
             .append(cl.tsym.name.toString());
        }
        s.append(TypeMaker.typeArgumentsString(env, cl, full));
        return s.toString();
    }
}