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1
61
62 package org.jaxen.expr;
63
64
65 import org.jaxen.Context;
66 import org.jaxen.JaxenException;
67
68
69 class DefaultPathExpr extends DefaultExpr implements PathExpr {
70
71 private Expr filterExpr;
72 private LocationPath locationPath;
73
74 DefaultPathExpr(Expr filterExpr,
75 LocationPath locationPath) {
76 this.filterExpr = filterExpr;
77 this.locationPath = locationPath;
78 }
79
80 public Expr getFilterExpr() {
81 return this.filterExpr;
82 }
83
84
85 public void setFilterExpr(Expr filterExpr) {
86 this.filterExpr = filterExpr;
87 }
88
89
90 public LocationPath getLocationPath() {
91 return this.locationPath;
92 }
93
94
95 public String  toString() {
96 if (getLocationPath() != null) {
97 return "[(DefaultPathExpr): " + getFilterExpr() + ", " + getLocationPath() + "]";
98 }
99
100 return "[(DefaultPathExpr): " + getFilterExpr() + "]";
101 }
102
103
104 public String getText() {
105 StringBuffer buf = new StringBuffer ();
106
107 if (getFilterExpr() != null) {
108 buf.append(getFilterExpr().getText());
109 }
110
111 if (getLocationPath() != null) {
112 buf.append(getLocationPath().getText());
113 }
114
115 return buf.toString();
116 }
117
118
119 public Expr simplify() {
120 if (getFilterExpr() != null) {
121 setFilterExpr(getFilterExpr().simplify());
122 }
123
124 if (getLocationPath() != null) {
125 getLocationPath().simplify();
126 }
127
128 if (getFilterExpr() == null && getLocationPath() == null) {
129 return null;
130 }
131
132
133 if (getLocationPath() == null) {
134 return getFilterExpr();
135 }
136
137 if (getFilterExpr() == null) {
138 return getLocationPath();
139 }
140
141 return this;
142 }
143
144 public Object evaluate(Context context) throws JaxenException {
145 Object results = null;
146 Context pathContext = null;
147 if (getFilterExpr() != null) {
148 results = getFilterExpr().evaluate(context);
149 pathContext = new Context(context.getContextSupport());
150 pathContext.setNodeSet(convertToList(results));
151 }
152 if (getLocationPath() != null) {
153 return getLocationPath().evaluate(pathContext);
154 }
155 return results;
156 }
157
158 public void accept(Visitor visitor) {
159 visitor.visit(this);
160 }
161 }
162
163 |
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