001/*
002 * (C) Copyright 2006-2011 Nuxeo SA (http://nuxeo.com/) and others.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *     http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 *
016 * Contributors:
017 *     bstefanescu
018 */
019package org.nuxeo.ecm.automation.core.operations.document;
020
021import java.util.HashSet;
022import java.util.Set;
023
024import org.apache.commons.logging.Log;
025import org.apache.commons.logging.LogFactory;
026import org.nuxeo.common.utils.StringUtils;
027import org.nuxeo.ecm.automation.OperationContext;
028import org.nuxeo.ecm.automation.core.Constants;
029import org.nuxeo.ecm.automation.core.annotations.Context;
030import org.nuxeo.ecm.automation.core.annotations.Operation;
031import org.nuxeo.ecm.automation.core.annotations.OperationMethod;
032import org.nuxeo.ecm.automation.core.annotations.Param;
033import org.nuxeo.ecm.automation.core.events.DocumentAttributeFilterFactory;
034import org.nuxeo.ecm.automation.core.scripting.Expression;
035import org.nuxeo.ecm.automation.core.scripting.Scripting;
036import org.nuxeo.ecm.core.api.DocumentModel;
037import org.nuxeo.ecm.core.api.DocumentModelList;
038import org.nuxeo.ecm.core.api.Filter;
039import org.nuxeo.ecm.core.api.impl.DocumentModelListImpl;
040
041/**
042 * @author <a href="mailto:bs@nuxeo.com">Bogdan Stefanescu</a>
043 */
044@Operation(id = FilterDocuments.ID, category = Constants.CAT_DOCUMENT, label = "Filter List", description = "Filter the input list of documents given a condition. The condition can be expressed using 4 parameters: types, facets, lifecycle and condition. If more than one parameter is specified an AND will be used to group conditions. <br>The 'types' parameter can take a comma separated list of document type: File,Note.<br>The 'facet' parameter can take a single facet name.<br> The 'life cycle' parameter takes a name of a life cycle state the document should have.<br>The 'condition' parameter can take any EL expression.<p>Returns the list of documents that match the filter condition.")
045public class FilterDocuments {
046
047    private static final Log log = LogFactory.getLog(FilterDocuments.class);
048
049    public static final String ID = "Document.Filter";
050
051    @Context
052    protected OperationContext ctx;
053
054    @Param(name = "types", required = false)
055    protected String types; // comma separated list.
056
057    @Param(name = "facet", required = false)
058    protected String facet;
059
060    @Param(name = "lifecycle", required = false)
061    protected String lifeCycle;
062
063    @Param(name = "pathStartsWith", required = false)
064    protected String pathStartsWith;
065
066    @Param(name = "condition", required = false)
067    protected String condition;
068
069    @Param(name = "class", required = false, widget = Constants.W_OPTION, values = {
070            DocumentAttributeFilterFactory.ANY_DOC, DocumentAttributeFilterFactory.REGULAR_DOC,
071            DocumentAttributeFilterFactory.LINK_DOC, DocumentAttributeFilterFactory.PUBLISHED_DOC,
072            DocumentAttributeFilterFactory.PROXY_DOC, DocumentAttributeFilterFactory.VERSION_DOC,
073            DocumentAttributeFilterFactory.IMMUTABLE_DOC, DocumentAttributeFilterFactory.MUTABLE_DOC })
074    protected String attr;
075
076    @OperationMethod
077    public DocumentModelList run(DocumentModelList docs) {
078        Condition cond = new Condition();
079        DocumentModelList result = new DocumentModelListImpl();
080        for (DocumentModel doc : docs) {
081            if (cond.accept(doc)) {
082                result.add(doc);
083            }
084        }
085        return result;
086    }
087
088    protected class Condition implements Filter {
089        private static final long serialVersionUID = 1L;
090
091        Set<String> types;
092
093        String facet;
094
095        String lc;
096
097        String path;
098
099        Expression expr;
100
101        Filter attr;
102
103        Condition() {
104            String v = FilterDocuments.this.types;
105            if (v != null) {
106                v = v.trim();
107                if (v.length() > 0) {
108                    types = new HashSet<String>();
109                    for (String t : StringUtils.split(v, ',', true)) {
110                        types.add(t);
111                    }
112                }
113            }
114            v = FilterDocuments.this.facet;
115            if (v != null) {
116                v = v.trim();
117                if (v.length() > 0) {
118                    facet = v;
119                }
120            }
121            v = lifeCycle;
122            if (v != null) {
123                v = v.trim();
124                if (v.length() > 0) {
125                    lc = v;
126                }
127            }
128            v = pathStartsWith;
129            if (v != null) {
130                v = v.trim();
131                if (v.length() > 0) {
132                    path = v;
133                }
134            }
135            v = condition;
136            if (v != null) {
137                v = v.trim();
138                if (v.length() > 0) {
139                    expr = Scripting.newExpression(v);
140                }
141            }
142            v = FilterDocuments.this.attr;
143            if (v != null) {
144                attr = DocumentAttributeFilterFactory.getFilter(v);
145            }
146        }
147
148        @Override
149        public boolean accept(DocumentModel doc) {
150            if (types != null) {
151                if (!types.contains(doc.getType())) {
152                    return false;
153                }
154            }
155            if (facet != null) {
156                if (!doc.getFacets().contains(facet)) {
157                    return false;
158                }
159            }
160            if (lc != null) {
161                if (!lc.equals(doc.getCurrentLifeCycleState())) {
162                    return false;
163                }
164            }
165            if (path != null) {
166                if (!doc.getPathAsString().startsWith(path)) {
167                    return false;
168                }
169            }
170            if (attr != null) {
171                if (!attr.accept(doc)) {
172                    return false;
173                }
174            }
175            if (expr != null) {
176                try {
177                    if (!(Boolean) expr.eval(ctx)) {
178                        return false;
179                    }
180                } catch (RuntimeException e) {
181                    log.error(e, e);
182                }
183            }
184            return true;
185        }
186    }
187
188}