01: /*
02: * Copyright 2007 Outerthought bvba and Schaubroeck nv
03: *
04: * Licensed under the Apache License, Version 2.0 (the "License");
05: * you may not use this file except in compliance with the License.
06: * You may obtain a copy of the License at
07: *
08: * http://www.apache.org/licenses/LICENSE-2.0
09: *
10: * Unless required by applicable law or agreed to in writing, software
11: * distributed under the License is distributed on an "AS IS" BASIS,
12: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13: * See the License for the specific language governing permissions and
14: * limitations under the License.
15: */
16: package org.outerj.daisy.diff.tag;
17:
18: /**
19: * An Atom that represents a piece of ordinary text.
20: */
21: public class TextAtom implements Atom {
22:
23: private String s;
24:
25: public TextAtom(String s) {
26: if (!isValidAtom(s))
27: throw new IllegalArgumentException(
28: "The given String is not a valid Text Atom");
29: this .s = s;
30: }
31:
32: public String getFullText() {
33: return s;
34: }
35:
36: public String getIdentifier() {
37: return s;
38: }
39:
40: public String getInternalIdentifiers() {
41: throw new IllegalStateException(
42: "This Atom has no internal identifiers");
43: }
44:
45: public boolean hasInternalIdentifiers() {
46: return false;
47: }
48:
49: public boolean isValidAtom(String s) {
50: return s != null && s.length() > 0;
51: }
52:
53: @Override
54: public String toString() {
55: return "TextAtom: " + getFullText();
56: }
57:
58: public boolean equalsIdentifier(Atom other) {
59: return other.getIdentifier().equals(getIdentifier());
60: }
61:
62: }
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