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/*
 * Javolution - Java(TM) Solution for Real-Time and Embedded Systems
 * Copyright (C) 2014 - Javolution (http://javolution.org/)
 * All rights reserved.
 * 
 * Permission to use, copy, modify, and distribute this software is
 * freely granted, provided that this notice is preserved.
 */
package javolution.util;

import java.util.Collection;

import javolution.lang.Constant;
import javolution.util.internal.table.ConstantTableImpl;
import javolution.util.internal.table.ReversedTableImpl;
import javolution.util.internal.table.SubTableImpl;
import javolution.util.service.TableService;
import javolution.xml.DefaultXMLFormat;
import javolution.xml.XMLFormat;
import javolution.xml.stream.XMLStreamException;

/**
 * 

A table for which immutability is guaranteed by construction.

* * @author Jean-Marie Dautelle * @version 6.1, February 2, 2014 */ @Constant(comment = "Immutable") @DefaultXMLFormat(ConstantTable.XML.class) public class ConstantTable extends FastTable { /** * The default XML representation for constant tables * (list of elements). */ public static class XML extends XMLFormat> { @Override public ConstantTable newInstance( Class> cls, InputElement xml) throws XMLStreamException { int size = xml.getAttribute("size", 0); Object[] elements = new Object[size]; for (int i = 0; i < size; i++) { elements[i] = xml.getNext(); } return ConstantTable.of(elements); } @Override public void read(javolution.xml.XMLFormat.InputElement xml, ConstantTable that) throws XMLStreamException { // Do nothing (read during instantiation). } @Override public void write(ConstantTable that, javolution.xml.XMLFormat.OutputElement xml) throws XMLStreamException { int n = that.size(); xml.setAttribute("size", n); for (int i = 0; i < n; i++) { xml.add(that.get(i)); } } }; private static final long serialVersionUID = 0x600L; // Version. /** * Returns a new constant table holding the specified {@link Constant * constant} elements. */ public static ConstantTable of(@Constant E... elements) { return new ConstantTable(new ConstantTableImpl(elements)); } /** * Returns a new constant table holding the same elements as the specified * collection (convenience method). */ @SuppressWarnings("unchecked") public static ConstantTable of(Collection that) { return ConstantTable.of((E[]) that.toArray(new Object[that.size()])); } /** * Creates a constant table backed up by the specified{@link Constant * constant} service implementation. */ protected ConstantTable(@Constant TableService service) { super(service); } //////////////////////////////////////////////////////////////////////////// // Views. // @Constant @Override public ConstantTable atomic() { return this; // Thread-Safe (unmodifiable) } @Constant @Override public ConstantTable reversed() { return new ConstantTable(new ReversedTableImpl(service())); } @Constant @Override public ConstantTable shared() { return this; // Thread-Safe (unmodifiable) } @Constant @Override public ConstantTable subTable(int fromIndex, int toIndex) { return new ConstantTable(new SubTableImpl(service(), fromIndex, toIndex)); } @Constant @Override public ConstantTable unmodifiable() { return this; } @Constant @Override protected TableService service() { return super.service(); } }




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