/*
* Copyright 2012 astamuse company,Ltd.
*
* 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.
*
*/
package com.astamuse.asta4d.snippet;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import com.astamuse.asta4d.Configuration;
import com.astamuse.asta4d.Context;
import com.astamuse.asta4d.interceptor.base.Executor;
import com.astamuse.asta4d.interceptor.base.InterceptorUtil;
import com.astamuse.asta4d.render.Renderer;
import com.astamuse.asta4d.snippet.extract.SnippetExtractor;
import com.astamuse.asta4d.snippet.interceptor.ContextDataAutowireInterceptor;
import com.astamuse.asta4d.snippet.interceptor.SnippetInitializeInterceptor;
import com.astamuse.asta4d.snippet.interceptor.SnippetInterceptor;
import com.astamuse.asta4d.snippet.resolve.SnippetResolver;
public class DefaultSnippetInvoker implements SnippetInvoker {
private List<SnippetInterceptor> snippetInterceptorList = getDefaultSnippetInterceptorList();
protected static class InterceptorResult {
Renderer renderer = null;
SnippetInterceptor finalInterceptor = null;
}
@Override
public Renderer invoke(String renderDeclaration) throws SnippetNotResovlableException, SnippetInvokeException {
Configuration conf = Context.getCurrentThreadContext().getConfiguration();
SnippetExtractor extractor = conf.getSnippetExtractor();
SnippetDeclarationInfo declaration = extractor.extract(renderDeclaration);
SnippetResolver resolver = conf.getSnippetResolver();
SnippetExcecutionInfo exeInfo = resolver.resloveSnippet(declaration);
SnippetExecutionHolder execution = new SnippetExecutionHolder(declaration, exeInfo.getInstance(), exeInfo.getMethod(), null, null);
Executor<SnippetExecutionHolder> executor = new Executor<SnippetExecutionHolder>() {
@Override
public void execute(SnippetExecutionHolder executionHolder) throws Exception {
Object instance = executionHolder.getInstance();
Method method = executionHolder.getMethod();
Object[] params = executionHolder.getParams();
if (params == null) {
executionHolder.setExecuteResult((Renderer) method.invoke(instance));
} else {
executionHolder.setExecuteResult((Renderer) method.invoke(instance, params));
}
}
};
try {
InterceptorUtil.executeWithInterceptors(execution, snippetInterceptorList, executor);
return execution.getExecuteResult();
} catch (SnippetInvokeException ex) {
throw ex;
} catch (Exception ex) {
Object[] params = execution.getParams();
String msg = "execute with params:" + (params == null ? null : Arrays.asList(params));
throw new SnippetInvokeException(declaration, msg, ex);
}
}
protected List<SnippetInterceptor> getDefaultSnippetInterceptorList() {
List<SnippetInterceptor> list = new ArrayList<>();
list.add(new ContextDataAutowireInterceptor());
list.add(new SnippetInitializeInterceptor());
return list;
}
public List<SnippetInterceptor> getSnippetInterceptorList() {
return snippetInterceptorList;
}
public void setSnippetInterceptorList(List<SnippetInterceptor> snippetInterceptorList) {
this.snippetInterceptorList.clear();
this.snippetInterceptorList.addAll(getDefaultSnippetInterceptorList());
if (snippetInterceptorList != null) {
this.snippetInterceptorList.addAll(snippetInterceptorList);
}
}
}