/*

 * Copyright (c) 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

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 */

package jdk.jshell;

import java.util.LinkedHashMap;

import java.util.Map;

import java.util.stream.Stream;

import jdk.jshell.Key.TypeDeclKey;

import jdk.jshell.Key.ErroneousKey;

import jdk.jshell.Key.ExpressionKey;

import jdk.jshell.Key.ImportKey;

import jdk.jshell.Key.MethodKey;

import jdk.jshell.Key.StatementKey;

import jdk.jshell.Key.VarKey;

import jdk.jshell.Snippet.SubKind;

import static jdk.jshell.Snippet.SubKind.SINGLE_STATIC_IMPORT_SUBKIND;

import static jdk.jshell.Snippet.SubKind.SINGLE_TYPE_IMPORT_SUBKIND;

/**

 * Maps signature to Key by Kind.

 * @author Robert Field

 */

class KeyMap {

    private final JShell state;

    KeyMap(JShell state) {

        this.state = state;

    }

    private final Map<String, TypeDeclKey> classMap = new LinkedHashMap<>();

    private final Map<String, MethodKey> methodMap = new LinkedHashMap<>();

    private final Map<String, VarKey> varMap = new LinkedHashMap<>();

    private final Map<String, ImportKey> importMap = new LinkedHashMap<>();

    TypeDeclKey keyForClass(String name) {

        return classMap.computeIfAbsent(name, k -> new TypeDeclKey(state, name));

    }

    MethodKey keyForMethod(String name, String parameterTypes) {

        return methodMap.computeIfAbsent(name + ":" + parameterTypes,

                                         k -> new MethodKey(state, name, parameterTypes));

    }

    VarKey keyForVariable(String name) {

        return varMap.computeIfAbsent(name, k -> new VarKey(state, name));

    }

    ImportKey keyForImport(String name, SubKind snippetKind) {

        return importMap.computeIfAbsent(name + ":"

                + ((snippetKind == SINGLE_TYPE_IMPORT_SUBKIND || snippetKind == SINGLE_STATIC_IMPORT_SUBKIND)

                        ? "single"

                        : snippetKind.toString()),

                k -> new ImportKey(state, name, snippetKind));

    }

    StatementKey keyForStatement() {

        return new StatementKey(state);

    }

    ExpressionKey keyForExpression(String name, String type) {

        return new ExpressionKey(state, name, type);

    }

    ErroneousKey keyForErroneous() {

        return new ErroneousKey(state);

    }

    boolean doesVariableNameExist(String name) {

        return varMap.get(name) != null;

    }

    Stream<ImportKey> importKeys() {

        return importMap.values().stream();

    }

}