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/*
 ***** BEGIN LICENSE BLOCK *****
 * Version: EPL 1.0/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Eclipse Public
 * License Version 1.0 (the "License"); you may not use this file
 * except in compliance with the License. You may obtain a copy of
 * the License at http://www.eclipse.org/legal/epl-v10.html
 *
 * Software distributed under the License is distributed on an "AS
 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * rights and limitations under the License.
 *
 * Copyright (C) 2002 Anders Bengtsson 
 * Copyright (C) 2002 Jan Arne Petersen 
 * Copyright (C) 2002 Benoit Cerrina 
 * Copyright (C) 2004 Thomas E Enebo 
 * Copyright (C) 2006 Lukas Felber 
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either of the GNU General Public License Version 2 or later (the "GPL"),
 * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the EPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the EPL, the GPL or the LGPL.
 ***** END LICENSE BLOCK *****/
package org.jruby.ast;

import java.util.List;

import org.jcodings.Encoding;

import org.jruby.ast.types.ILiteralNode;
import org.jruby.ast.types.INameNode;
import org.jruby.ast.visitor.NodeVisitor;
import org.jruby.lexer.yacc.ISourcePosition;
import org.jruby.util.ByteList;

/**
 * Represents a symbol (:symbol_name).
 */
public class SymbolNode extends Node implements ILiteralNode, INameNode, SideEffectFree {
    private final ByteList bytes;

    // Interned ident path (e.g. [':', ident]).
    public SymbolNode(ISourcePosition position, String name, Encoding encoding, int cr) {
        super(position, false);
        this.bytes = new ByteList(name.getBytes(encoding.getCharset()), encoding);
    }

    // String path (e.g. [':', str_beg, str_content, str_end])
    public SymbolNode(ISourcePosition position, ByteList value) {
        super(position, false);
        this.bytes = value;
    }

    public boolean equals(Object other) {
        return other instanceof SymbolNode &&
                bytes.equals(((SymbolNode) other).bytes) &&
                bytes.getEncoding() == ((SymbolNode) other).getEncoding();
    }

    public NodeType getNodeType() {
        return NodeType.SYMBOLNODE;
    }

    public  T accept(NodeVisitor iVisitor) {
        return iVisitor.visitSymbolNode(this);
    }

    /**
     * Gets the name.
     * @return Returns a String
     */
    public String getName() {
        return new String(bytes.unsafeBytes(), bytes.getEncoding().getCharset());
    }

    public Encoding getEncoding() {
        return bytes.getEncoding();
    }

    public List childNodes() {
        return EMPTY_LIST;
    }

    public ByteList getBytes() {
        return bytes;
    }
}