/*
 * Copyright (c) 2018, 2019, Oracle and/or its affiliates.
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification, are
 * permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this list of
 * conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice, this list of
 * conditions and the following disclaimer in the documentation and/or other materials provided
 * with the distribution.
 *
 * 3. Neither the name of the copyright holder nor the names of its contributors may be used to
 * endorse or promote products derived from this software without specific prior written
 * permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS
 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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 * OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package com.oracle.truffle.llvm.runtime.debug.scope;

import com.oracle.truffle.api.CompilerDirectives.TruffleBoundary;
import com.oracle.truffle.llvm.runtime.debug.LLVMDebuggerValue;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.Map;

public final class LLVMDebuggerScopeEntries extends LLVMDebuggerValue {

    static final LLVMDebuggerScopeEntries EMPTY_SCOPE = new LLVMDebuggerScopeEntries();

    private final Map<String, Object> entries;

    LLVMDebuggerScopeEntries() {
        this.entries = new HashMap<>();
    }

    @TruffleBoundary
    void add(String name, Object value) {
        entries.put(name, value);
    }

    @TruffleBoundary
    boolean contains(String name) {
        return entries.containsKey(name);
    }

    @Override
    @TruffleBoundary
    protected int getElementCountForDebugger() {
        return entries.size();
    }

    @Override
    @TruffleBoundary
    protected String[] getKeysForDebugger() {
        final int count = getElementCountForDebugger();
        if (count == 0) {
            return NO_KEYS;
        }
        return new ArrayList<>(entries.keySet()).toArray(NO_KEYS);
    }

    @Override
    @TruffleBoundary
    protected Object getElementForDebugger(String key) {
        return entries.get(key);
    }

    @TruffleBoundary
    void removeElement(String key) {
        entries.remove(key);
    }
}