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/*
* This file is part of *** M y C o R e ***
* See http://www.mycore.de/ for details.
*
* MyCoRe is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* MyCoRe is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with MyCoRe. If not, see .
*/
package org.mycore.frontend.cli;
import java.io.IOException;
import java.text.MessageFormat;
import java.util.Collection;
import java.util.List;
import java.util.Locale;
import org.jaxen.JaxenException;
import org.jdom2.Document;
import org.jdom2.Element;
import org.jdom2.Namespace;
import org.jdom2.filter.Filter;
import org.jdom2.filter.Filters;
import org.jdom2.xpath.XPathExpression;
import org.jdom2.xpath.XPathFactory;
import org.mycore.access.MCRAccessException;
import org.mycore.common.MCRConstants;
import org.mycore.common.MCRPersistenceException;
import org.mycore.common.config.MCRConfiguration2;
import org.mycore.common.content.MCRJDOMContent;
import org.mycore.common.xml.MCRNodeBuilder;
import org.mycore.datamodel.metadata.MCRMetadataManager;
import org.mycore.datamodel.metadata.MCRObject;
import org.mycore.datamodel.metadata.MCRObjectID;
import org.mycore.frontend.cli.annotation.MCRCommand;
import org.mycore.frontend.cli.annotation.MCRCommandGroup;
/**
* Commands to batch add/remove/replace values
* like identifiers, categories, tags, flags etc. within XML.
* Supported fields are completely configurable using XPath expressions.
*
* @author Frank L\u00FCtzenkirchen
*/
@MCRCommandGroup(name = "Batch Editor")
public class MCRBatchEditorCommands extends MCRAbstractCommands {
private static final Collection NS = MCRConstants.getStandardNamespaces();
private static final Filter FE = Filters.element();
private static final String CFG_PREFIX = "MCR.BatchEditor.";
private static final String CFG_PREFIX_BASE = CFG_PREFIX + "BaseLevel.";
private static final String CFG_SUFFIX_REMOVE = ".Path2Remove";
private static final String CFG_SUFFIX_ADD = ".Path2Add";
private enum Action {
ADD, ADD_IF, REMOVE, REMOVE_IF, REPLACE
}
@MCRCommand(syntax = "edit {0} at {1} add {2} {3}",
help = "Edit XML elements in object {0} at level {1} in object {1}, add field {2} with value {3}",
order = 2)
public static void batchAdd(String oid, String level, String field, String value)
throws JaxenException, MCRPersistenceException, MCRAccessException, IOException {
edit(oid, level, Action.ADD, field, value, null, null);
}
@MCRCommand(syntax = "edit {0} at {1} if {2} {3} add {4} {5}",
help = "Edit XML elements in object {0} at level {1}, if there is a field {2} with value {3}, "
+ "add field {4} with value {5}",
order = 1)
public static void batchAddIf(String oid, String level, String fieldIf, String valueIf, String field2Add,
String value2Add)
throws JaxenException, MCRPersistenceException, MCRAccessException, IOException {
edit(oid, level, Action.ADD_IF, fieldIf, valueIf, field2Add, value2Add);
}
@MCRCommand(syntax = "edit {0} at {1} remove {2} {3}",
help = "Edit XML elements at in object {0} at level {1}, remove field {2} where value is {3}",
order = 2)
public static void batchRemove(String oid, String level, String field, String value)
throws MCRPersistenceException, MCRAccessException, JaxenException, IOException {
edit(oid, level, Action.REMOVE, field, value, null, null);
}
@MCRCommand(syntax = "edit {0} at {1} if {2} {3} remove {4} {5}",
help = "Edit XML elements in object {0} at level {1}, if there is a field {2} with value {3}, "
+ "remove field {4} where value is {5}",
order = 1)
public static void batchRemoveIf(String oid, String level, String fieldIf, String valueIf, String field2Rem,
String value2Rem)
throws MCRPersistenceException, MCRAccessException, JaxenException, IOException {
edit(oid, level, Action.REMOVE_IF, fieldIf, valueIf, field2Rem, value2Rem);
}
@MCRCommand(syntax = "edit {0} at {1} replace {2} {3} with {4} {5}",
help = "Edit XML elements in object {0} at level {1}, replace field {2} value {3} by field {4} with value {5}",
order = 1)
public static void batchReplace(String oid, String level, String oldField, String oldValue, String newField,
String newValue)
throws JaxenException, MCRPersistenceException, MCRAccessException, IOException {
edit(oid, level, Action.REPLACE, oldField, oldValue, newField, newValue);
}
public static void edit(String oid, String level, Action a, String field1, String value1, String field2,
String value2)
throws JaxenException, MCRPersistenceException, MCRAccessException, IOException {
Document xmlOld = getObjectXML(oid);
Document xmlNew = xmlOld.clone();
for (Element base : getlevelElements(xmlNew, level)) {
if (a == Action.ADD) {
add(base, field1, value1);
} else if (a == Action.REMOVE) {
find(base, field1, value1).forEach(e -> e.detach());
} else if (a == Action.REPLACE) {
List found = find(base, field1, value1);
found.forEach(e -> e.detach());
if (!found.isEmpty()) {
add(base, field2, value2);
}
} else if (a == Action.ADD_IF) {
if (!find(base, field1, value1).isEmpty()) {
add(base, field2, value2);
}
} else if (a == Action.REMOVE_IF) {
if (!find(base, field1, value1).isEmpty()) {
find(base, field2, value2).forEach(e -> e.detach());
}
}
}
saveIfModified(xmlOld, xmlNew);
}
private static Document getObjectXML(String objectID) {
MCRObjectID oid = MCRObjectID.getInstance(objectID);
MCRObject obj = MCRMetadataManager.retrieveMCRObject(oid);
return obj.createXML();
}
private static void saveIfModified(Document xmlOld, Document xmlNew) throws MCRAccessException, IOException {
String oldData = new MCRJDOMContent(xmlOld).asString();
String newData = new MCRJDOMContent(xmlNew).asString();
if (!oldData.equals(newData)) {
MCRObject obj = new MCRObject(xmlNew);
MCRMetadataManager.update(obj);
}
}
private static List getlevelElements(Document xml, String level) {
String path = MCRConfiguration2.getStringOrThrow(CFG_PREFIX_BASE + level);
XPathExpression xPath = XPathFactory.instance().compile(path, FE, null, NS);
return xPath.evaluate(xml);
}
private static void add(Element base, String field, String value) throws JaxenException {
String path = MCRConfiguration2.getStringOrThrow(CFG_PREFIX + field + CFG_SUFFIX_ADD);
path = new MessageFormat(path, Locale.ROOT).format(new String[] { value });
new MCRNodeBuilder().buildNode(path, null, base);
}
private static List find(Element base, String field, String value) {
String path = MCRConfiguration2.getStringOrThrow(CFG_PREFIX + field + CFG_SUFFIX_REMOVE);
path = new MessageFormat(path, Locale.ROOT).format(new String[] { value });
XPathExpression fPath = XPathFactory.instance().compile(path, FE, null, NS);
List selected = fPath.evaluate(base);
return selected;
}
}
