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Implemented the pxp:compress and pxp:uncompress steps

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ndw committed Jan 30, 2013
1 parent f3f5e97 commit f345da010003fbd4f54a8d8735ff9668cf13fdc8
@@ -214,6 +214,12 @@
<implementation type="cx:send-mail"
class-name="com.xmlcalabash.extensions.SendMail"/>

<implementation type="cx:compress cx:gzip pxp:compress pxp:gzip"
class-name="com.xmlcalabash.extensions.Compress"/>

<implementation type="cx:uncompress cx:gunzip pxp:uncompress pxp:gunzip"
class-name="com.xmlcalabash.extensions.Uncompress"/>

<!-- Fileutils -->

<implementation type="cxf:info pxf:info"
@@ -354,4 +354,58 @@
<p:option name="command" select="'update'" cx:type="update|freshen|create|delete"/>
</p:declare-step>

<p:declare-step type="pxp:gzip">
<p:input port="source"/>
<p:output port="result"/>
<p:option name="href" cx:type="xsd:anyURI"/>
<p:option name="byte-order-mark" cx:type="xsd:boolean"/>
<p:option name="cdata-section-elements" select="''" cx:type="ListOfQNames"/>
<p:option name="doctype-public" cx:type="xsd:string"/>
<p:option name="doctype-system" cx:type="xsd:anyURI"/>
<p:option name="encoding" cx:type="xsd:string"/>
<p:option name="escape-uri-attributes" select="'false'" cx:type="xsd:boolean"/>
<p:option name="include-content-type" select="'true'" cx:type="xsd:boolean"/>
<p:option name="indent" select="'false'" cx:type="xsd:boolean"/>
<p:option name="media-type" cx:type="xsd:string"/>
<p:option name="method" select="'xml'" cx:type="xsd:QName"/>
<p:option name="normalization-form" select="'none'" cx:type="NormalizationForm"/>
<p:option name="omit-xml-declaration" select="'true'" cx:type="xsd:boolean"/>
<p:option name="standalone" select="'omit'" cx:type="true|false|omit"/>
<p:option name="undeclare-prefixes" cx:type="xsd:boolean"/>
<p:option name="version" select="'1.0'" cx:type="xsd:string"/>
</p:declare-step>

<p:declare-step type="pxp:gunzip">
<p:input port="source"/>
<p:output port="result"/>
</p:declare-step>

<p:declare-step type="pxp:compress">
<p:input port="source"/>
<p:output port="result"/>
<p:option name="href" cx:type="xsd:anyURI"/>
<p:option name="compression-method" cx:type="xsd:string"/>
<p:option name="byte-order-mark" cx:type="xsd:boolean"/>
<p:option name="cdata-section-elements" select="''" cx:type="ListOfQNames"/>
<p:option name="doctype-public" cx:type="xsd:string"/>
<p:option name="doctype-system" cx:type="xsd:anyURI"/>
<p:option name="encoding" cx:type="xsd:string"/>
<p:option name="escape-uri-attributes" select="'false'" cx:type="xsd:boolean"/>
<p:option name="include-content-type" select="'true'" cx:type="xsd:boolean"/>
<p:option name="indent" select="'false'" cx:type="xsd:boolean"/>
<p:option name="media-type" cx:type="xsd:string"/>
<p:option name="method" select="'xml'" cx:type="xsd:QName"/>
<p:option name="normalization-form" select="'none'" cx:type="NormalizationForm"/>
<p:option name="omit-xml-declaration" select="'true'" cx:type="xsd:boolean"/>
<p:option name="standalone" select="'omit'" cx:type="true|false|omit"/>
<p:option name="undeclare-prefixes" cx:type="xsd:boolean"/>
<p:option name="version" select="'1.0'" cx:type="xsd:string"/>
</p:declare-step>

<p:declare-step type="pxp:uncompress">
<p:input port="source"/>
<p:output port="result"/>
<p:option name="compression-method" cx:type="xsd:string"/>
</p:declare-step>

</p:library>
@@ -0,0 +1,53 @@
/*
* Store.java
*
* Copyright 2008 Mark Logic Corporation.
* Portions Copyright 2007 Sun Microsystems, Inc.
* All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common
* Development and Distribution License("CDDL") (collectively, the
* "License"). You may not use this file except in compliance with the
* License. You can obtain a copy of the License at
* https://xproc.dev.java.net/public/CDDL+GPL.html or
* docs/CDDL+GPL.txt in the distribution. See the License for the
* specific language governing permissions and limitations under the
* License. When distributing the software, include this License Header
* Notice in each file and include the License file at docs/CDDL+GPL.txt.
*/

package com.xmlcalabash.extensions;

import com.xmlcalabash.core.XProcException;
import com.xmlcalabash.core.XProcRuntime;
import com.xmlcalabash.library.Store;
import com.xmlcalabash.runtime.XAtomicStep;
import net.sf.saxon.s9api.QName;
import net.sf.saxon.s9api.SaxonApiException;

/**
*
* @author ndw
*
* N.B. This step implements both pxp:gzip and pxp:compress
*/
public class Compress extends Store {
private static final QName _compression_method = new QName("compression-method");

public Compress(XProcRuntime runtime, XAtomicStep step) {
super(runtime,step);
}

public void run() throws SaxonApiException {
String cmethod = getOption(_compression_method, "gzip");
if ("gzip".equals(cmethod)) {
method = CompressionMethod.GZIP;
} else {
throw XProcException.stepError(999, "The only compression method supported is 'gzip'.");
}

super.run();
}
}

@@ -0,0 +1,96 @@
/*
* Load.java
*
* Copyright 2008 Mark Logic Corporation.
* Portions Copyright 2007 Sun Microsystems, Inc.
* All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common
* Development and Distribution License("CDDL") (collectively, the
* "License"). You may not use this file except in compliance with the
* License. You can obtain a copy of the License at
* https://xproc.dev.java.net/public/CDDL+GPL.html or
* docs/CDDL+GPL.txt in the distribution. See the License for the
* specific language governing permissions and limitations under the
* License. When distributing the software, include this License Header
* Notice in each file and include the License file at docs/CDDL+GPL.txt.
*/

package com.xmlcalabash.extensions;

import com.xmlcalabash.core.XProcException;
import com.xmlcalabash.core.XProcRuntime;
import com.xmlcalabash.io.ReadablePipe;
import com.xmlcalabash.io.WritablePipe;
import com.xmlcalabash.library.DefaultStep;
import com.xmlcalabash.runtime.XAtomicStep;
import com.xmlcalabash.util.Base64;
import com.xmlcalabash.util.S9apiUtils;
import net.sf.saxon.s9api.QName;
import net.sf.saxon.s9api.SaxonApiException;
import net.sf.saxon.s9api.XdmNode;
import org.xml.sax.InputSource;

import java.io.ByteArrayInputStream;

/**
*
* @author ndw
*/
public class Uncompress extends DefaultStep {
protected static final String logger = "com.xmlcalabash.extensions.gunzip";
private static final QName _compression_method = new QName("compression-method");

private ReadablePipe source = null;
private WritablePipe result = null;

/**
* Creates a new instance of Load
*/
public Uncompress(XProcRuntime runtime, XAtomicStep step) {
super(runtime,step);
}

public void setInput(String port, ReadablePipe pipe) {
source = pipe;
}

public void setOutput(String port, WritablePipe pipe) {
result = pipe;
}

public void reset() {
source.resetReader();
result.resetWriter();
}

public void run() throws SaxonApiException {
super.run();

String cmethod = getOption(_compression_method, "gzip");
if (!"gzip".equals(cmethod)) {
throw XProcException.stepError(999, "The only compression method supported is 'gzip'.");
}

XdmNode root = S9apiUtils.getDocumentElement(source.read());
byte[] decoded = null;

// N.B. The Base64.decode() method *automatically* expands gzipped data!
if ("base64".equals(root.getAttributeValue(_encoding))) {
decoded = Base64.decode(root.getStringValue());
} else {
throw XProcException.stepError(999, "Input to cx:gunzip must be binary encoded data.");
}

try {
ByteArrayInputStream bais = new ByteArrayInputStream(decoded);
InputSource is = new InputSource(bais);
XdmNode doc = runtime.parse(is);
result.write(doc);
} catch (Exception e) {
throw new XProcException(e);
}
}
}

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