01: /*
02: * <copyright>
03: *
04: * Copyright 1997-2004 BBNT Solutions, LLC
05: * under sponsorship of the Defense Advanced Research Projects
06: * Agency (DARPA).
07: *
08: * You can redistribute this software and/or modify it under the
09: * terms of the Cougaar Open Source License as published on the
10: * Cougaar Open Source Website (www.cougaar.org).
11: *
12: * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
13: * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
14: * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
15: * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
16: * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
17: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
18: * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
19: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
20: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
22: * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23: *
24: * </copyright>
25: */
26:
27: package org.cougaar.lib.contract.lang;
28:
29: /**
30: * Interface which allows <code>Op</code>s to be parsed, provides their
31: * arguments, and allows type checking.
32: */
33: public interface OpParser {
34:
35: /**
36: * Take the next <tt>Op</tt> argument, returning <tt>null</tt> if the end
37: * of the arguments has been reached -- essentially a tokenizer for
38: * <tt>Op</tt>s.
39: * <p>
40: * For example, consider "(a (b) (c (d (e)) f)". Remove all the "("s
41: * and replace the ")"s with <tt>null</tt> to yield:<br>
42: * "a b <tt>null</tt> c d e <tt>null</tt> <tt>null</tt> f <tt>null</tt>"<br>
43: * This would be the result of many calls to <tt>nextOp</tt>, with any
44: * further calls returning <tt>null</tt>.
45: * <p>
46: * Future: Maybe create real AST? Currently can get away with simple
47: * <tt>nextOp</tt> pattern.
48: */
49: public Op nextOp() throws ParseException;
50:
51: /**
52: * @see org.cougaar.lib.contract.lang.TypeList
53: */
54: public void setTypeList(final TypeList tl);
55:
56: public void setTypeList(final Class cl);
57:
58: public int addType(final Type type);
59:
60: public TypeList getTypeList();
61:
62: public TypeList cloneTypeList();
63: }
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