41 lines
950 B
Java
41 lines
950 B
Java
/*
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* Copyright (c) 2011 Tony Garnock-Jones. All rights reserved.
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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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