001/* 002 * (C) Copyright 2006-2007 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 */ 017package org.nuxeo.ecm.platform.preview.adapter.base; 018 019import java.io.IOException; 020import java.util.ArrayList; 021import java.util.List; 022 023import org.apache.commons.logging.Log; 024import org.apache.commons.logging.LogFactory; 025import org.nuxeo.ecm.core.api.Blob; 026import org.nuxeo.ecm.core.api.Blobs; 027import org.nuxeo.ecm.core.api.PropertyException; 028import org.nuxeo.ecm.core.api.model.Property; 029import org.nuxeo.ecm.platform.preview.api.PreviewException; 030 031/** 032 * Base class for preview adapters that will use preprocessed HTML preview that is stored inside the document. 033 * 034 * @author tiry 035 */ 036public class PreprocessedHtmlPreviewAdapter extends AbstractHtmlPreviewAdapter { 037 038 private static final Log log = LogFactory.getLog(PreprocessedHtmlPreviewAdapter.class); 039 040 protected List<String> storedPreviewFieldsPaths = new ArrayList<String>(); 041 042 public PreprocessedHtmlPreviewAdapter(List<String> fieldsPaths) { 043 storedPreviewFieldsPaths = fieldsPaths; 044 } 045 046 @Override 047 public List<Blob> getPreviewBlobs() throws PreviewException { 048 049 List<Blob> resultBlobs = new ArrayList<Blob>(); 050 051 for (String xpath : storedPreviewFieldsPaths) { 052 try { 053 Property prop = adaptedDoc.getProperty(xpath); 054 if (prop.isComplex()) { 055 Blob blob = (Blob) prop.getValue(); 056 try { 057 blob.getStream().reset(); 058 } catch (IOException e) { 059 log.error(e); 060 } 061 resultBlobs.add(blob); 062 } else { 063 String data = (String) prop.getValue(); 064 resultBlobs.add(Blobs.createBlob(data)); 065 } 066 } catch (PropertyException e) { 067 throw new PreviewException("Unable to get property " + xpath, e); 068 } 069 } 070 return resultBlobs; 071 } 072 073 @Override 074 public List<Blob> getPreviewBlobs(String xpath) throws PreviewException { 075 return getPreviewBlobs(); 076 } 077 078 @Override 079 public void cleanup() { 080 // nothing to do 081 } 082 083 @Override 084 public boolean cachable() { 085 return false; 086 } 087 088 @Override 089 public boolean hasBlobToPreview() throws PreviewException { 090 return getPreviewBlobs().size() > 0; 091 } 092 093 @Override 094 public boolean hasPreview(String xpath) { 095 return hasBlobToPreview(); 096 } 097}