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Add XML Serializer to minimize xmlns-prefix generation.
Add tests (and handling) of empty prefixes (xmlns="urn:foo") Change-Id: Ie7a49858367b9d78c7cb7a34089670193f428e6e
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/* | ||
* Copyright (c) 2011, Daniel Spiewak | ||
* All rights reserved. | ||
* | ||
* Redistribution and use in source and binary forms, with or without modification, | ||
* are permitted provided that the following conditions are met: | ||
* | ||
* - Redistributions of source code must retain the above copyright notice, this | ||
* list of conditions and the following disclaimer. | ||
* - Redistributions in binary form must reproduce the above copyright notice, this | ||
* list of conditions and the following disclaimer in the documentation and/or | ||
* other materials provided with the distribution. | ||
* - Neither the name of "Anti-XML" nor the names of its contributors may | ||
* be used to endorse or promote products derived from this software without | ||
* specific prior written permission. | ||
* | ||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND | ||
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED | ||
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | ||
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR | ||
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | ||
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | ||
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON | ||
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | ||
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | ||
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | ||
*/ | ||
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package com.codecommit | ||
package antixml | ||
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import java.io.Writer | ||
import java.io.File | ||
import java.io.FileOutputStream | ||
import java.io.OutputStreamWriter | ||
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class XMLSerializer(val encoding : String, val outputDeclaration : Boolean) { | ||
def serializeDocument(elem : Elem, w : Writer) { | ||
if (outputDeclaration) { | ||
w.append("<?xml version=\"1.0\" encoding=\"") | ||
w.append(encoding ) | ||
w.append("\" standalone=\"yes\"?>") | ||
} | ||
serialize(elem, w); | ||
} | ||
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def serializeDocument(elem : Elem, outputFile : java.io.File) { | ||
serializeDocument(elem, new OutputStreamWriter(new FileOutputStream(outputFile), encoding)) | ||
} | ||
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def serialize(elem : Elem, w : Writer) { | ||
var scopes : List[Map[String, String]] = Nil; | ||
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def doSerialize(node : Node, w : Writer) { | ||
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node match { | ||
case Elem(prefix, name, attrs, scope, children) => { | ||
val parentScope = scopes.headOption getOrElse Map() | ||
scopes = scope :: scopes | ||
val attrStr = if (attrs.isEmpty) | ||
"" | ||
else | ||
" " + (attrs map { case (key, value) => key.toString + "=\"" + Node.escapeText(value) + '"' } mkString " ") | ||
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val scopeChange = scope filter { case (key, value) => parentScope.get(key) != Some(value) } | ||
val prefixesStr = if (scopeChange.isEmpty) | ||
"" | ||
else | ||
" " + (scopeChange map { | ||
case (key, value) => (if (key == "") "xmlns" else "xmlns:" + key) + "=\"" + Node.escapeText(value) + '"' } mkString " ") | ||
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val qname = (prefix map { _ + ":" } getOrElse "") + name | ||
val partial = "<" + qname + attrStr + prefixesStr | ||
if (children.isEmpty) { | ||
w append partial | ||
w append "/>" | ||
} else { | ||
w append partial | ||
w append '>' | ||
children.foreach(doSerialize(_, w)) | ||
w append "</" | ||
w append qname | ||
w append '>' | ||
} | ||
scopes = scopes.tail | ||
} | ||
case node => w.append(node.toString()) | ||
} | ||
} | ||
doSerialize(elem, w) | ||
} | ||
} | ||
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object XMLSerializer { | ||
def apply(encoding : String = "UTF-8", outputDeclaration : Boolean = false) : XMLSerializer = { | ||
new XMLSerializer(encoding, outputDeclaration); | ||
} | ||
} |
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