-
Notifications
You must be signed in to change notification settings - Fork 143
/
IndentingXMLStreamWriter.java
187 lines (159 loc) · 5.75 KB
/
IndentingXMLStreamWriter.java
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
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
/*
* Copyright (c) 2023 Contributors to the Eclipse Foundation
* Copyright (c) 2007, 2018 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0, which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the
* Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
* version 2 with the GNU Classpath Exception, which is available at
* https://www.gnu.org/software/classpath/license.html.
*
* SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
*/
package org.jvnet.hk2.config;
import javax.xml.stream.XMLStreamWriter;
import javax.xml.stream.XMLStreamException;
import java.util.Stack;
/**
* @author Kohsuke Kawaguchi
*/
public class IndentingXMLStreamWriter extends DelegatingXMLStreamWriter {
private final static Object SEEN_NOTHING = new Object();
private final static Object SEEN_ELEMENT = new Object();
private final static Object SEEN_DATA = new Object();
private Object state = SEEN_NOTHING;
private Stack<Object> stateStack = new Stack<Object>();
private String indentStep = " ";
private int depth = 0;
public IndentingXMLStreamWriter(XMLStreamWriter writer) {
super(writer);
}
/**
* Return the current indent step.
*
* <p>Return the current indent step: each start tag will be
* indented by this number of spaces times the number of
* ancestors that the element has.</p>
*
* @return The number of spaces in each indentation step,
* or 0 or less for no indentation.
* @see #setIndentStep(int)
*
* @deprecated
* Only return the length of the indent string.
*/
public int getIndentStep() {
return indentStep.length();
}
/**
* Set the current indent step.
*
* @param indentStep The new indent step (0 or less for no
* indentation).
* @see #getIndentStep()
*
* @deprecated
* Should use the version that takes string.
*/
public void setIndentStep(int indentStep) {
StringBuilder s = new StringBuilder();
for (; indentStep > 0; indentStep--) s.append(' ');
setIndentStep(s.toString());
}
public void setIndentStep(String s) {
this.indentStep = s;
}
private void onStartElement() throws XMLStreamException {
stateStack.push(SEEN_ELEMENT);
state = SEEN_NOTHING;
if (depth > 0) {
super.writeCharacters("\n");
}
doIndent();
depth++;
}
private void onEndElement() throws XMLStreamException {
depth--;
if (state == SEEN_ELEMENT) {
super.writeCharacters("\n");
doIndent();
}
state = stateStack.pop();
}
private void onEmptyElement() throws XMLStreamException {
state = SEEN_ELEMENT;
if (depth > 0) {
super.writeCharacters("\n");
}
doIndent();
}
/**
* Print indentation for the current level.
*
* @exception org.xml.sax.SAXException If there is an error
* writing the indentation characters, or if a filter
* further down the chain raises an exception.
*/
private void doIndent() throws XMLStreamException {
if (depth > 0) {
for (int i = 0; i < depth; i++)
super.writeCharacters(indentStep);
}
}
public void writeStartDocument() throws XMLStreamException {
super.writeStartDocument();
super.writeCharacters("\n");
}
public void writeStartDocument(String version) throws XMLStreamException {
super.writeStartDocument(version);
super.writeCharacters("\n");
}
public void writeStartDocument(String encoding, String version) throws XMLStreamException {
super.writeStartDocument(encoding, version);
super.writeCharacters("\n");
}
public void writeStartElement(String localName) throws XMLStreamException {
onStartElement();
super.writeStartElement(localName);
}
public void writeStartElement(String namespaceURI, String localName) throws XMLStreamException {
onStartElement();
super.writeStartElement(namespaceURI, localName);
}
public void writeStartElement(String prefix, String localName, String namespaceURI) throws XMLStreamException {
onStartElement();
super.writeStartElement(prefix, localName, namespaceURI);
}
public void writeEmptyElement(String namespaceURI, String localName) throws XMLStreamException {
onEmptyElement();
super.writeEmptyElement(namespaceURI, localName);
}
public void writeEmptyElement(String prefix, String localName, String namespaceURI) throws XMLStreamException {
onEmptyElement();
super.writeEmptyElement(prefix, localName, namespaceURI);
}
public void writeEmptyElement(String localName) throws XMLStreamException {
onEmptyElement();
super.writeEmptyElement(localName);
}
public void writeEndElement() throws XMLStreamException {
onEndElement();
super.writeEndElement();
}
public void writeCharacters(String text) throws XMLStreamException {
state = SEEN_DATA;
super.writeCharacters(text);
}
public void writeCharacters(char[] text, int start, int len) throws XMLStreamException {
state = SEEN_DATA;
super.writeCharacters(text, start, len);
}
public void writeCData(String data) throws XMLStreamException {
state = SEEN_DATA;
super.writeCData(data);
}
}