Java example source code file (Hierarchy.java)

This example Java source code file (Hierarchy.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.

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Java - Java tags/keywords

arraylist, assertionerror, classcase, hashmap, hashset, hierarchy, idefault, list, map, override, set, string, stringbuilder, unexpected, util

The Hierarchy.java Java example source code

/*
 * Copyright (c) 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 org.openjdk.tests.shapegen;

import java.util.ArrayList;
import java.util.List;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;

import static org.openjdk.tests.shapegen.ClassCase.Kind.*;

/**
 *
 * @author Robert Field
 */
public class Hierarchy {

    public final ClassCase root;
    public final Set<ClassCase> all;

    public Hierarchy(ClassCase root) {
        this.root = root;
        root.init(new HashMap<String,Integer>());
        Set<ClassCase> allClasses = new HashSet<>();
        root.collectClasses(allClasses);
        this.all = allClasses;
    }

    public boolean anyDefaults() {
        for (ClassCase cc : all) {
            if (cc.kind == IDEFAULT) {
                return true;
            }
        }
        return false;
    }

    public boolean get_OK() {
        return root.get_OK();
    }

    public String testName() {
        return root + "Test";
    }

    private static void genInterfaceList(StringBuilder buf, String prefix, List<ClassCase> interfaces) {
            if (!interfaces.isEmpty()) {
                buf.append(" ");
                buf.append(prefix);
                buf.append(" ");
                buf.append(interfaces.get(0));
                for (int i = 1; i < interfaces.size(); ++i) {
                    buf.append(", " + interfaces.get(i));
                }
            }
    }

    public static void genClassDef(StringBuilder buf, ClassCase cc, String implClass, List<ClassCase> defaultRef) {
        if (cc.isInterface()) {
            buf.append("interface ");
            buf.append(cc.getName() + " ");
            genInterfaceList(buf, "extends", cc.getInterfaces());
            buf.append(" {\n");

            switch (cc.kind) {
                case IDEFAULT:
                    buf.append("    default String m() { return \"\"; }\n");
                    defaultRef.add(cc);
                    break;
                case IPRESENT:
                    buf.append("    String m();\n");
                    break;
                case IVAC:
                    break;
                default:
                    throw new AssertionError("Unexpected kind");
            }
            buf.append("}\n\n");
        } else {
            buf.append((cc.isAbstract()? "abstract " : ""));
            buf.append(" class " + cc.getName());
            if (cc.getSuperclass() != null) {
                buf.append(" extends " + cc.getSuperclass());
            }

            genInterfaceList(buf, "implements", cc.getInterfaces());
            buf.append(" {\n");

            switch (cc.kind) {
                case CCONCRETE:
                    buf.append("   public String m() { return \"\"; }\n");
                    break;
                case CABSTRACT:
                    buf.append("   public abstract String m();\n");
                    break;
                case CNONE:
                    break;
                default:
                    throw new AssertionError("Unexpected kind");
            }
            buf.append("}\n\n");
        }
    }

    @Override
    public boolean equals(Object obj) {
        return obj instanceof Hierarchy && root.getID().equals(((Hierarchy)obj).root.getID());
    }

    @Override
    public int hashCode() {
        return root.getID().hashCode();
    }

    @Override
    public String toString() {
        return root.getName();
    }

    private static String classNames[] = {
        "C", "D", "E", "F", "G", "H", "S", "T", "U", "V"
    };

    private static String interfaceNames[] = {
        "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R"
    };

    private static int CLASS_INDEX = 0;
    private static int INTERFACE_INDEX = 1;
    private static int NUM_INDICIES = 2;

    public List<String> getDescription() {
        Map<ClassCase,String> nameMap = new HashMap<>();
        assignNames(root, new int[NUM_INDICIES], nameMap);

        ArrayList<String> res = new ArrayList<>();
        if (root.getSupertypes().size() == 0) {
           res.add(nameMap.get(root) + root.kind.getPrefix() + "()");
        } else {
            genCaseDescription(root, res, new HashSet<ClassCase>(), nameMap);
        }
        return res;
    }

    private static void assignNames(
            ClassCase cc, int indices[], Map<ClassCase,String> names) {
        String name = names.get(cc);
        if (name == null) {
            if (cc.isInterface()) {
                names.put(cc, interfaceNames[indices[INTERFACE_INDEX]++]);
            } else {
                names.put(cc, classNames[indices[CLASS_INDEX]++]);
            }
            for (int i = 0; i < cc.getSupertypes().size(); ++i) {
                assignNames(cc.getSupertypes().get(i), indices, names);
            }
        }
    }

    private static void genCaseDescription(
            ClassCase cc, List<String> res, Set alreadyDone,
            Map<ClassCase,String> nameMap) {
        if (!alreadyDone.contains(cc)) {
            if (cc.getSupertypes().size() > 0) {
                StringBuilder sb = new StringBuilder();
                sb.append(nameMap.get(cc));
                sb.append(cc.kind.getPrefix());
                sb.append("(");
                for (int i = 0; i < cc.getSupertypes().size(); ++i) {
                    ClassCase supertype = cc.getSupertypes().get(i);
                    if (i != 0) {
                        sb.append(",");
                    }
                    genCaseDescription(supertype, res, alreadyDone, nameMap);
                    sb.append(nameMap.get(supertype));
                    sb.append(supertype.kind.getPrefix());
                }
                sb.append(")");
                res.add(sb.toString());
            }
        }
        alreadyDone.add(cc);
    }
}