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XmlWriter.java
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136 lines (121 loc) · 3.61 KB
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/*******************************************************************************
* Copyright 2011 See AUTHORS file.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
******************************************************************************/
package com.badlogic.gdx.utils;
import java.io.IOException;
import java.io.Writer;
//@off
/**
* Builder style API for emitting XML. <pre>
* StringWriter writer = new StringWriter();
* XmlWriter xml = new XmlWriter(writer);
* xml.element("meow")
* .attribute("moo", "cow")
* .element("child")
* .attribute("moo", "cow")
* .element("child")
* .attribute("moo", "cow")
* .text("XML is like violence. If it doesn't solve your problem, you're not using enough of it.")
* .pop()
* .pop()
* .pop();
* System.out.println(writer);
* </pre>
* @author Nathan Sweet
*/
//@on
public class XmlWriter extends Writer {
private final Writer writer;
private final Array<String> stack = new Array();
private String currentElement;
private boolean indentNextClose;
public int indent;
public XmlWriter (Writer writer) {
this.writer = writer;
}
private void indent () throws IOException {
int count = indent;
if (currentElement != null) count++;
for (int i = 0; i < count; i++)
writer.write('\t');
}
public XmlWriter element (String name) throws IOException {
if (startElementContent()) writer.write('\n');
indent();
writer.write('<');
writer.write(name);
currentElement = name;
return this;
}
public XmlWriter element (String name, Object text) throws IOException {
return element(name).text(text).pop();
}
private boolean startElementContent () throws IOException {
if (currentElement == null) return false;
indent++;
stack.add(currentElement);
currentElement = null;
writer.write(">");
return true;
}
public XmlWriter attribute (String name, Object value) throws IOException {
if (currentElement == null) throw new IllegalStateException();
writer.write(' ');
writer.write(name);
writer.write("=\"");
writer.write(value == null ? "null" : value.toString());
writer.write('"');
return this;
}
public XmlWriter text (Object text) throws IOException {
startElementContent();
String string = text == null ? "null" : text.toString();
indentNextClose = string.length() > 64;
if (indentNextClose) {
writer.write('\n');
indent();
}
writer.write(string);
if (indentNextClose) writer.write('\n');
return this;
}
public XmlWriter pop () throws IOException {
if (currentElement != null) {
writer.write("/>\n");
currentElement = null;
} else {
indent = Math.max(indent - 1, 0);
if (indentNextClose) indent();
writer.write("</");
writer.write(stack.pop());
writer.write(">\n");
}
indentNextClose = true;
return this;
}
/** Calls {@link #pop()} for each remaining open element, if any, and closes the stream. */
public void close () throws IOException {
while (stack.size != 0)
pop();
writer.close();
}
public void write (char[] cbuf, int off, int len) throws IOException {
startElementContent();
writer.write(cbuf, off, len);
}
public void flush () throws IOException {
writer.flush();
}
}