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https://github.com/Alfresco/alfresco-community-repo.git
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7aba799ed8
This included some overrides of getParamDisplayLabel() in the RenditionService classes to support i18n key-value pairs which are common across many rendering engines. These actions and their parameters have been hidden by Erik in the default Alfresco config. The changes contained in this check-in mean that 3rd parties could show these actions and parameters and see useful labels. git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@20009 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261
277 lines
11 KiB
Java
277 lines
11 KiB
Java
/*
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* Copyright (C) 2005-2010 Alfresco Software Limited.
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*
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* This file is part of Alfresco
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*
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* Alfresco is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Alfresco is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
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*/
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package org.alfresco.repo.rendition.executer;
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import java.io.IOException;
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import java.io.OutputStreamWriter;
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import java.io.Serializable;
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import java.io.Writer;
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import java.util.Collection;
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import java.util.Map;
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import org.alfresco.repo.action.ParameterDefinitionImpl;
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import org.alfresco.service.cmr.action.ParameterDefinition;
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import org.alfresco.service.cmr.dictionary.DataTypeDefinition;
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import org.alfresco.service.cmr.rendition.RenditionServiceException;
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import org.alfresco.service.cmr.repository.ContentWriter;
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import org.alfresco.service.cmr.repository.NodeRef;
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import org.alfresco.service.cmr.repository.StoreRef;
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import org.alfresco.service.cmr.repository.TemplateService;
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import org.alfresco.service.cmr.search.ResultSet;
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import org.alfresco.service.cmr.search.SearchService;
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import org.apache.commons.logging.Log;
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import org.apache.commons.logging.LogFactory;
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import org.springframework.extensions.surf.util.I18NUtil;
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/**
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* This abstract class forms a basis for all rendering engines that are built
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* around the Template Service.<br>
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* A template must be specified either as a {@link String} using the
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* PARAM_TEMPLATE parameter, as a {@link NodeRef} using the PARAM_TEMPLATE_NODE
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* parameter or as a file path location using the PARAM_TEMPLATE_PATH parameter.
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* The RenderingEngine reads from these parameters with the following priority:
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* PARAM_TEMPLATE > PARAM_TEMPLATE_NODE > PARAM_TEMPLATE_PATH.
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*
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* @author Brian Remmington
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* @since 3.3
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*/
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public abstract class BaseTemplateRenderingEngine extends AbstractRenderingEngine
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{
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private static final Log log = LogFactory.getLog(BaseTemplateRenderingEngine.class);
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/**
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* This optional {@link Map}<{@link String}, {@link Serializable}> parameter
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* can be used to pass additional arguments to the templating engine when processing a
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* template.
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*/
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public static final String PARAM_MODEL = "model";
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/**
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* This optional {@link String} parameter specifies the template in a simple
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* {@link String} format.<br>
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* If this parameter is set the Rendering Engine will
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* use it in preference to templates specified by either the
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* PARAM_TEMPLATE_NODE or the PARAM_TEMPLATE_PATH parameters.
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*/
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public static final String PARAM_TEMPLATE = "template_string";
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/**
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* This optional {@link NodeRef} parameter specifies a node containing the
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* template to be processed.<br>
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* If a value is specified for PARAM_TEMPLATE then this parameter will be
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* ignored.<br>
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* If a value is specified for this parameter it will be used in preference
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* to values specified for the PARAM_TEMPLATE_PATH parameter.
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*/
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public static final String PARAM_TEMPLATE_NODE = "template_node";
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/**
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* This optional {@link String} parameter specifies a file path location for
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* the template to be processed.<br>
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* If a value is specified for PARAM_TEMPLATE or PARAM_TEMPLATE_NODE then this parameter will be
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* ignored.<br>
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*/
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public static final String PARAM_TEMPLATE_PATH = "template_path";
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private TemplateService templateService;
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private SearchService searchService;
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/*
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* @see org.alfresco.repo.rendition.executer.AbstractRenderingEngine#render(org
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* .alfresco.service.cmr.repository.NodeRef, org.alfresco.service.cmr.rendition.RenditionDefinition,
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* org.alfresco.service.cmr.repository.ContentReader, org.alfresco.service.cmr.repository.ChildAssociationRef)
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*/
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@Override
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protected void render(RenderingContext context)
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{
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NodeRef templateNode = getTemplateNode(context);
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Writer writer = null;
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try
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{
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Object model = buildModel(context);
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ContentWriter contentWriter = context.makeContentWriter();
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writer = new OutputStreamWriter(contentWriter.getContentOutputStream());
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processTemplate(context, templateNode, model, writer);
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}
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catch (RuntimeException ex)
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{
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throw ex;
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}
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catch (Exception ex)
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{
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log.warn("Unexpected error while rendering through XSLT rendering engine.", ex);
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}
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finally
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{
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if (writer != null)
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{
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try
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{
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writer.flush();
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writer.close();
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}
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catch (IOException ex)
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{
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log.warn("Failed to correctly close content writer.", ex);
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}
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}
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}
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}
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private void processTemplate(RenderingContext context, NodeRef templateNode, Object model, Writer out)
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{
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String templateType = getTemplateType();
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String template = context.getCheckedParam(PARAM_TEMPLATE, String.class);
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if (template != null)
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{
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templateService.processTemplateString(templateType, template, model, out);
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}
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else if (templateNode != null)
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{
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templateService.processTemplate(templateType, templateNode.toString(), model, out);
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}
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else
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{
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throwTemplateParamsNotFoundException();
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}
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}
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private void throwTemplateParamsNotFoundException()
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{
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StringBuilder msg = new StringBuilder("This action requires that either the ");
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msg.append(PARAM_TEMPLATE);
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msg.append(" parameter or the ");
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msg.append(PARAM_TEMPLATE_NODE);
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msg.append(" parameter be specified. ");
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throw new RenditionServiceException(msg.toString());
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}
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protected NodeRef getTemplateNode(RenderingContext context)
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{
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NodeRef node = context.getCheckedParam(PARAM_TEMPLATE_NODE, NodeRef.class);
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if (node == null)
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{
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String path = context.getCheckedParam(PARAM_TEMPLATE_PATH, String.class);
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if (path != null && path.length() > 0)
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{
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StoreRef storeRef = context.getDestinationNode().getStoreRef();
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ResultSet result = searchService.query(storeRef, SearchService.LANGUAGE_XPATH, path);
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if (result.length() != 1)
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{
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throw new RenditionServiceException("Could not find template node for path: " + path);
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}
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node = result.getNodeRef(0);
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}
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}
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return node;
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}
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/**
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* Create the model that will be passed to the template service for rendering
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* with the appropriate template.
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* @param context The context of the rendering request
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* @return The model that is to be passed to the template service
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*/
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protected abstract Object buildModel(RenderingContext context);
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/**
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* Get the type of template that is to be used. This identifies the name of the template
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* processor that should be used, such as "freemarker" or "xslt".
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* @return
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*/
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protected abstract String getTemplateType();
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/**
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* This method gets the parameter definition display label from the properties file.
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* It looks first for a property whose key has a fixed rendition service-specific
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* prefix and if that gets null, it then delegates to the standard bean name-based
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* approach.
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*
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* @param paramName the name of the parameter
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* @return the display label of the parameter
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*/
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@Override
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protected String getParamDisplayLabel(String paramName)
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{
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// First we try to get the message using a common prefix for all template-based rendering engines.
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final String commonPropertiesPrefix = "baseTemplateRenderingAction";
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String message = I18NUtil.getMessage(commonPropertiesPrefix + "." + paramName + "." + DISPLAY_LABEL);
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// And if that doesn't work we delegate to the superclass.
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if (message == null)
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{
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message = super.getParamDisplayLabel(paramName);
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}
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return message;
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}
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/*
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* (non-Javadoc)
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* @see org.alfresco.repo.rendition.executer.AbstractRenderingEngine#getParameterDefinitions()
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*/
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@Override
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protected Collection<ParameterDefinition> getParameterDefinitions()
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{
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Collection<ParameterDefinition> paramList = super.getParameterDefinitions();
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ParameterDefinitionImpl modelParamDef = new ParameterDefinitionImpl(PARAM_MODEL, DataTypeDefinition.ANY, false,
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getParamDisplayLabel(PARAM_MODEL));
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ParameterDefinitionImpl templateParamDef = new ParameterDefinitionImpl(//
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PARAM_TEMPLATE, DataTypeDefinition.TEXT, false, getParamDisplayLabel(PARAM_TEMPLATE));
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ParameterDefinitionImpl templateNodeParamDef = new ParameterDefinitionImpl(PARAM_TEMPLATE_NODE,
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DataTypeDefinition.NODE_REF, false, getParamDisplayLabel(PARAM_TEMPLATE_NODE));
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ParameterDefinitionImpl templatePathParamDef = new ParameterDefinitionImpl(PARAM_TEMPLATE_PATH,
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DataTypeDefinition.TEXT, false, getParamDisplayLabel(PARAM_TEMPLATE_PATH));
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paramList.add(modelParamDef);
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paramList.add(templateParamDef);
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paramList.add(templateNodeParamDef);
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paramList.add(templatePathParamDef);
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return paramList;
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}
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/**
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* @param templateService
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* the templateService to set
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*/
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public void setTemplateService(TemplateService templateService)
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{
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this.templateService = templateService;
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}
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/**
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* @param searchService
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* the searchService to set
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*/
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public void setSearchService(SearchService searchService)
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{
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this.searchService = searchService;
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}
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public TemplateService getTemplateService()
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{
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return templateService;
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}
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public SearchService getSearchService()
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{
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return searchService;
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}
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}
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