OpenConcerto

Dépôt officiel du code source de l'ERP OpenConcerto
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svn://code.openconcerto.org/openconcerto

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/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
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 *
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 * Copyright 2011 OpenConcerto, by ILM Informatique. All rights reserved.
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 *
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 * The contents of this file are subject to the terms of the GNU General Public License Version 3
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 * only ("GPL"). You may not use this file except in compliance with the License. You can obtain a
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 * copy of the License at http://www.gnu.org/licenses/gpl-3.0.html See the License for the specific
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 * language governing permissions and limitations under the License.
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 *
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 * When distributing the software, include this License Header Notice in each file.
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 */
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 package org.openconcerto.utils.i18n;
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import java.util.Collections;
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import java.util.LinkedHashMap;
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import java.util.Map;
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import java.util.TreeSet;
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import com.ibm.icu.text.MessageFormat;
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import net.jcip.annotations.ThreadSafe;
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/**
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 * {@link MessageFormat} can take numbered or named arguments, this class unifies both. This class
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 * is thread safe if the array or map isn't modified.
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 */
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@ThreadSafe
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public final class MessageArgs {
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    static protected boolean isOrdered(final Map<?, ?> m) {
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        return m instanceof LinkedHashMap;
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    }
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    static private final MessageArgs EMPTY = new MessageArgs(new Object[0]);
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    public final static MessageArgs getEmpty() {
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        return EMPTY;
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    }
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    public final static MessageArgs create(final String key, final Object value) {
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        return new MessageArgs(Collections.singletonMap(key, value));
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    }
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    private final boolean mapPrimary;
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    private Object[] array;
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    private Map<String, ?> map;
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    public MessageArgs(final Object[] array) {
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        this(null, array);
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    }
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    public MessageArgs(final Map<String, ?> map) {
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        this(map, null);
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    }
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    private MessageArgs(final Map<String, ?> map, final Object[] array) {
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        super();
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        if (map == null && array == null)
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            throw new NullPointerException();
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        this.mapPrimary = map != null;
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        assert this.mapPrimary == (array == null);
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        this.array = array;
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        this.map = map;
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    }
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    public final boolean isMapPrimary() {
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        return this.mapPrimary;
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    }
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    public final synchronized Object getAll() {
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        return this.mapPrimary ? this.map : this.array;
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    }
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    protected synchronized Object[] getArray() {
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        if (this.array == null) {
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            this.array = new Object[this.map.size()];
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            int i = 0;
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            if (isOrdered(this.map)) {
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                for (final Object v : this.map.values())
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                    this.array[i++] = v;
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            } else {
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                for (final String name : new TreeSet<String>(this.map.keySet()))
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                    this.array[i++] = this.map.get(name);
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            }
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            assert i == this.array.length;
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        }
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        return this.array;
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    }
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    protected synchronized Map<String, ?> getMap() {
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        if (this.map == null) {
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            final int stop = this.array.length;
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            if (stop == 0) {
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                this.map = Collections.emptyMap();
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            } else {
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                final Map<String, Object> res = new LinkedHashMap<>(stop);
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                for (int i = 0; i < stop; i++) {
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                    res.put(String.valueOf(i), this.array[i]);
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                }
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                this.map = Collections.unmodifiableMap(res);
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            }
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        }
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        return this.map;
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    }
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    public final Object getArgument(int i) {
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        return getArray()[i];
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    }
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    public final Object getArgument(String name) {
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        return getMap().get(name);
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    }
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}