blob: 9ee7e60872e84d48a435b2cd4c92ba57baa4b475 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
|
/*******************************************************************************
* Copyright (c) 2007, 2008 Oracle. All rights reserved.
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0, which accompanies this distribution
* and is available at http://www.eclipse.org/legal/epl-v10.html.
*
* Contributors:
* Oracle - initial API and implementation
******************************************************************************/
package org.eclipse.jpt.common.core.internal.utility.jdt;
import java.util.List;
import org.eclipse.jdt.core.dom.AST;
import org.eclipse.jdt.core.dom.ASTNode;
import org.eclipse.jdt.core.dom.ArrayInitializer;
import org.eclipse.jdt.core.dom.Expression;
import org.eclipse.jpt.common.core.utility.jdt.ExpressionConverter;
import org.eclipse.jpt.common.utility.internal.StringTools;
/**
* Convert an array initializer to/from an array of strings (e.g. {"text0", "text1"}).
*
* Do NOT use this class for converting array initializers in annotation elements.
* Java5 has a bit of syntactic sugar that allows a single-element array
* initializer to not have curly braces. This converter will return null if it encounters
* anything other than an array initializer.
*
* Invalid entries in the array initializer will result in null elements in the
* resulting string array. This allows clients to manipulate elements at
* the appropriate index.
*/
public class StringArrayExpressionConverter
extends AbstractExpressionConverter<String[]>
{
private final ExpressionConverter<String> elementConverter;
private final boolean removeArrayInitializerWhenEmpty;
/**
* The default behavior is to remove the array initializer if it is empty.
*/
public StringArrayExpressionConverter(ExpressionConverter<String> elementConverter) {
this(elementConverter, true);
}
public StringArrayExpressionConverter(ExpressionConverter<String> elementConverter, boolean removeArrayInitializerWhenEmpty) {
super();
this.elementConverter = elementConverter;
this.removeArrayInitializerWhenEmpty = removeArrayInitializerWhenEmpty;
}
/*
* this method is 'public' so it can be called by
* AnnotationStringArrayExpressionConverter
*/
@Override
public ArrayInitializer convertObject(String[] strings, AST ast) {
if ((strings.length == 0) && this.removeArrayInitializerWhenEmpty) {
return null;
}
ArrayInitializer arrayInitializer = ast.newArrayInitializer();
List<Expression> expressions = this.expressions(arrayInitializer);
for (String string : strings) {
expressions.add(this.elementConverter.convert(string, ast));
}
return arrayInitializer;
}
@SuppressWarnings("unchecked")
private List<Expression> expressions(ArrayInitializer arrayInitializer) {
return arrayInitializer.expressions();
}
/*
* this method is 'public' so it can be called by
* AnnotationStringArrayExpressionConverter
*/
@Override
public String[] convertNull() {
return StringTools.EMPTY_STRING_ARRAY;
}
@Override
protected String[] convertExpression(Expression expression) {
return (expression.getNodeType() == ASTNode.ARRAY_INITIALIZER) ?
this.convertArrayInitializer((ArrayInitializer) expression) :
StringTools.EMPTY_STRING_ARRAY;
}
/*
* this method is 'public' so it can be called by
* AnnotationStringArrayExpressionConverter
*/
public String[] convertArrayInitializer(ArrayInitializer arrayInitializer) {
List<Expression> expressions = this.expressions(arrayInitializer);
int len = expressions.size();
String[] strings = new String[len];
for (int i = len; i-- > 0; ) {
strings[i] = this.elementConverter.convert(expressions.get(i));
}
return strings;
}
}
|
