001/* 002 * (C) Copyright 2006-2007 Nuxeo SAS (http://nuxeo.com/) and contributors. 003 * 004 * All rights reserved. This program and the accompanying materials 005 * are made available under the terms of the GNU Lesser General Public License 006 * (LGPL) version 2.1 which accompanies this distribution, and is available at 007 * http://www.gnu.org/licenses/lgpl.html 008 * 009 * This library is distributed in the hope that it will be useful, 010 * but WITHOUT ANY WARRANTY; without even the implied warranty of 011 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 012 * Lesser General Public License for more details. 013 * 014 */ 015package org.nuxeo.ecm.platform.preview.adapter.base; 016 017import java.io.IOException; 018import java.util.ArrayList; 019import java.util.List; 020 021import org.apache.commons.logging.Log; 022import org.apache.commons.logging.LogFactory; 023import org.nuxeo.ecm.core.api.Blob; 024import org.nuxeo.ecm.core.api.Blobs; 025import org.nuxeo.ecm.core.api.PropertyException; 026import org.nuxeo.ecm.core.api.model.Property; 027import org.nuxeo.ecm.platform.preview.api.PreviewException; 028 029/** 030 * Base class for preview adapters that will use preprocessed HTML preview that is stored inside the document. 031 * 032 * @author tiry 033 */ 034public class PreprocessedHtmlPreviewAdapter extends AbstractHtmlPreviewAdapter { 035 036 private static final Log log = LogFactory.getLog(PreprocessedHtmlPreviewAdapter.class); 037 038 protected List<String> storedPreviewFieldsPaths = new ArrayList<String>(); 039 040 public PreprocessedHtmlPreviewAdapter(List<String> fieldsPaths) { 041 storedPreviewFieldsPaths = fieldsPaths; 042 } 043 044 @Override 045 public List<Blob> getPreviewBlobs() throws PreviewException { 046 047 List<Blob> resultBlobs = new ArrayList<Blob>(); 048 049 for (String xpath : storedPreviewFieldsPaths) { 050 try { 051 Property prop = adaptedDoc.getProperty(xpath); 052 if (prop.isComplex()) { 053 Blob blob = (Blob) prop.getValue(); 054 try { 055 blob.getStream().reset(); 056 } catch (IOException e) { 057 log.error(e); 058 } 059 resultBlobs.add(blob); 060 } else { 061 String data = (String) prop.getValue(); 062 resultBlobs.add(Blobs.createBlob(data)); 063 } 064 } catch (PropertyException e) { 065 throw new PreviewException("Unable to get property " + xpath, e); 066 } 067 } 068 return resultBlobs; 069 } 070 071 @Override 072 public List<Blob> getPreviewBlobs(String xpath) throws PreviewException { 073 return getPreviewBlobs(); 074 } 075 076 @Override 077 public void cleanup() { 078 // nothing to do 079 } 080 081 @Override 082 public boolean cachable() { 083 return false; 084 } 085 086 @Override 087 public boolean hasBlobToPreview() throws PreviewException { 088 return getPreviewBlobs().size() > 0; 089 } 090 091}