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1
46 package org.codehaus.groovy.ast.expr;
47
48 import groovy.lang.GString;
49
50 import java.util.ArrayList  ;
51 import java.util.Iterator ;
52 import java.util.List ;
53
54 import org.codehaus.groovy.ast.GroovyCodeVisitor;
55 import org.codehaus.groovy.classgen.AsmClassGenerator2;
56
57
64 public class GStringExpression extends Expression {
65
66 private String verbatimText;
67 private List strings = new ArrayList ();
68 private List values = new ArrayList ();
69
70 public GStringExpression(String verbatimText) {
71 this.verbatimText = verbatimText;
72 super.setTypeClass(GString.class);
73 }
74
75 public GStringExpression(String verbatimText, List strings, List values) {
76 this.verbatimText = verbatimText;
77 this.strings = strings;
78 this.values = values;
79 super.setTypeClass(GString.class);
80 }
81
82 public void visit(GroovyCodeVisitor visitor) {
83 visitor.visitGStringExpression(this);
84 }
85
86 public Expression transformExpression(ExpressionTransformer transformer) {
87 return new GStringExpression(
88 verbatimText,
89 transformExpressions(strings, transformer),
90 transformExpressions(values, transformer));
91 }
92
93 protected void resolveType(AsmClassGenerator2 resolver) {
94 }
96
97 public String toString() {
98 return super.toString() + "[strings: " + strings + " values: " + values + "]";
99 }
100
101 public List getStrings() {
102 return strings;
103 }
104
105 public List getValues() {
106 return values;
107 }
108
109 public void addString(ConstantExpression text) {
110 if (text == null) {
111 throw new NullPointerException ("Cannot add a null text expression");
112 }
113 strings.add(text);
114 }
115
116 public void addValue(Expression value) {
117 if (strings.size() == 0)
120 strings.add(ConstantExpression.EMPTY_STRING);
121 values.add(value);
122 }
123
124 public Expression getValue(int idx) {
125 return (Expression) values.get(idx);
126 }
127
128 public boolean isConstantString() {
129 return values.isEmpty();
130 }
131
132 public Expression asConstantString() {
133 StringBuffer buffer = new StringBuffer ();
134 for (Iterator iter = strings.iterator(); iter.hasNext();) {
135 ConstantExpression expression = (ConstantExpression) iter.next();
136 Object value = expression.getValue();
137 if (value != null) {
138 buffer.append(value);
139 }
140 }
141 return new ConstantExpression(buffer.toString());
142 }
143 }
144 |
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