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: * An generic tree visitor, customized for the contract language.
31: */
32: //
33: // Note:
34: // Might want to change the <tt>visitEnd()</tt> to something like
35: // <tt>visitEndWord(String)</tt>, since this would make String XML
36: // generation easier. The only downside is the extra memory in
37: // saving the duplicate <code>String</code>s when tokenizing.
38: //
39: public interface TreeVisitor {
40:
41: public static final boolean DEFAULT_VERBOSE = false;
42:
43: public void initialize();
44:
45: public boolean isVerbose();
46:
47: public void setVerbose(boolean verbose);
48:
49: public void visitEnd();
50:
51: public void visitWord(String word);
52:
53: /**
54: * @param type if null, then "java.lang.String" is assumed
55: */
56: public void visitConstant(String type, String value);
57:
58: /**
59: * Short for <tt>visitConstant(null, value)</tt>.
60: */
61: public void visitConstant(String value);
62:
63: public void visitEndOfTree();
64:
65: }
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