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TemplateBase.java
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package act.view;
/*-
* #%L
* ACT Framework
* %%
* Copyright (C) 2014 - 2017 ActFramework
* %%
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* #L%
*/
import act.Act;
import act.ActResponse;
import act.app.ActionContext;
import act.mail.MailerContext;
import org.osgl.http.H;
import org.osgl.util.Charsets;
import java.nio.charset.Charset;
import java.util.Map;
/**
* Base class for {@link Template} implementations
*/
public abstract class TemplateBase implements Template {
private static final Charset UTF8 = Charsets.UTF_8;
@Override
public void merge(ActionContext context) {
Map<String, Object> renderArgs = context.renderArgs();
if (!context.isByPassImplicitTemplateVariable()) {
exposeImplicitVariables(renderArgs, context);
}
beforeRender(context);
ActResponse resp = context.resp();
merge(renderArgs, resp);
//resp.commit();
}
@Override
public String render(ActionContext context) {
Map<String, Object> renderArgs = context.renderArgs();
exposeImplicitVariables(renderArgs, context);
beforeRender(context);
return render(renderArgs);
}
@Override
public String render(MailerContext context) {
Map<String, Object> renderArgs = context.renderArgs();
exposeImplicitVariables(renderArgs, context);
beforeRender(context);
return render(renderArgs);
}
/**
* Sub class can implement this method to inject logic that needs to be done
* before rendering happening
*
* @param context
*/
protected void beforeRender(ActionContext context) {}
/**
* Sub class can implement this method to inject logic that needs to be done
* before rendering happening
*
* @param context
*/
protected void beforeRender(MailerContext context) {}
protected void merge(Map<String, Object> renderArgs, H.Response response) {
String result = render(renderArgs);
response.writeContent(result);
}
protected abstract String render(Map<String, Object> renderArgs);
private void exposeImplicitVariables(Map<String, Object> renderArgs, ActionContext context) {
for (ActionViewVarDef var : Act.viewManager().implicitActionViewVariables()) {
Object val = var.eval(context);
if (null != val) {
renderArgs.put(var.name(), val);
}
}
}
private void exposeImplicitVariables(Map<String, Object> renderArgs, MailerContext context) {
for (MailerViewVarDef var : Act.viewManager().implicitMailerViewVariables()) {
Object val = var.eval(context);
if (null != val) {
renderArgs.put(var.name(), val);
}
}
}
}