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/*
 * Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * The Universal Permissive License (UPL), Version 1.0
 *
 * Subject to the condition set forth below, permission is hereby granted to any
 * person obtaining a copy of this software, associated documentation and/or
 * data (collectively the "Software"), free of charge and under any and all
 * copyright rights in the Software, and any and all patent rights owned or
 * freely licensable by each licensor hereunder covering either (i) the
 * unmodified Software as contributed to or provided by such licensor, or (ii)
 * the Larger Works (as defined below), to deal in both
 *
 * (a) the Software, and
 *
 * (b) any piece of software and/or hardware listed in the lrgrwrks.txt file if
 * one is included with the Software each a "Larger Work" to which the Software
 * is contributed by such licensors),
 *
 * without restriction, including without limitation the rights to copy, create
 * derivative works of, display, perform, and distribute the Software and make,
 * use, sell, offer for sale, import, export, have made, and have sold the
 * Software and the Larger Work(s), and to sublicense the foregoing rights on
 * either these or other terms.
 *
 * This license is subject to the following condition:
 *
 * The above copyright notice and either this complete permission notice or at a
 * minimum a reference to the UPL must be included in all copies or substantial
 * portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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 * SOFTWARE.
 */
package com.oracle.truffle.api.debug;

import com.oracle.truffle.api.interop.TruffleObject;
import com.oracle.truffle.api.nodes.LanguageInfo;
import java.util.AbstractCollection;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;

/**
 * Translation of a map of object properties to a collection of debugger values. The implementation
 * is not thread safe.
 */
final class ValuePropertiesCollection extends AbstractCollection {

    private final Debugger debugger;
    private final LanguageInfo language;
    private final TruffleObject object;
    private final Map map;
    private final Set> entrySet;
    private final DebugScope scope;

    ValuePropertiesCollection(Debugger debugger, LanguageInfo language, TruffleObject object,
                    Map map, Set> entrySet, DebugScope scope) {
        this.debugger = debugger;
        this.language = language;
        this.object = object;
        this.map = map;
        this.entrySet = entrySet;
        this.scope = scope;
    }

    @Override
    public Iterator iterator() {
        return new PropertiesIterator(object, entrySet.iterator());
    }

    @Override
    public int size() {
        return entrySet.size();
    }

    DebugValue get(String name) {
        Object value = map.get(name);
        if (value == null) {
            return null;
        }
        return new DebugValue.PropertyNamedValue(debugger, language, object, map, name, scope);
    }

    private final class PropertiesIterator implements Iterator {

        private final TruffleObject object;
        private final Iterator> entries;

        PropertiesIterator(TruffleObject object, Iterator> entries) {
            this.object = object;
            this.entries = entries;
        }

        @Override
        public boolean hasNext() {
            return entries.hasNext();
        }

        @Override
        public DebugValue next() {
            try {
                return new DebugValue.PropertyValue(debugger, language, object, entries.next(), scope);
            } catch (ThreadDeath td) {
                throw td;
            } catch (Throwable ex) {
                throw new DebugException(debugger, ex, language, null, true, null);
            }
        }

        @Override
        public void remove() {
            throw new UnsupportedOperationException("remove not supported.");
        }

    }

}




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