54 lines
1.6 KiB
Java
54 lines
1.6 KiB
Java
// Copyright 2011, 2012 Tony Garnock-Jones <tonygarnockjones@gmail.com>.
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//
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// This file is part of Hop.
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//
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// Hop is free software: you can redistribute it and/or modify it
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// under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Hop is distributed in the hope that it will be useful, but WITHOUT
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// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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// or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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// License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Hop. If not, see <http://www.gnu.org/licenses/>.
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//
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package hop;
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import java.util.ArrayList;
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/**
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*/
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public class SexpList extends ArrayList<Object> {
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public SexpBytes getBytes(int index) throws SexpSyntaxError {
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Object x = get(index);
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if (x != null && !(x instanceof SexpBytes)) {
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throw new SexpSyntaxError("Unexpected non-bytes");
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}
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return (SexpBytes) get(index);
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}
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public SexpList getList(int index) throws SexpSyntaxError {
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Object x = get(index);
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if (x != null && !(x instanceof SexpList)) {
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throw new SexpSyntaxError("Unexpected non-list");
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}
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return (SexpList) get(index);
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}
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public static SexpList empty() {
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return new SexpList();
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}
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public static SexpList with(Object x) {
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return empty().and(x);
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}
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public SexpList and(Object x) {
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this.add(x);
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return this;
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}
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}
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