net.hasor.dataql.compiler.cc.ImportInstCompiler Maven / Gradle / Ivy
/*
* Copyright 2008-2009 the original author or authors.
*
* 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 net.hasor.dataql.compiler.cc;
import net.hasor.dataql.compiler.QueryCompilerException;
import net.hasor.dataql.compiler.qil.CompilerContext;
import net.hasor.dataql.compiler.qil.InstCompiler;
import net.hasor.dataql.compiler.qil.InstQueue;
import net.hasor.dataql.parser.ast.inst.ImportInst;
import net.hasor.dataql.parser.ast.inst.ImportInst.ImportType;
import net.hasor.dataql.parser.ast.inst.RootBlockSet;
import net.hasor.dataql.parser.ast.token.StringToken;
import net.hasor.dataql.runtime.QueryHelper;
import net.hasor.utils.ExceptionUtils;
import java.io.InputStream;
import java.util.Objects;
/**
* import 语法
* @author 赵永春 ([email protected])
* @version : 2017-03-23
*/
public class ImportInstCompiler implements InstCompiler {
@Override
public void doCompiler(ImportInst astInst, InstQueue queue, CompilerContext compilerContext) {
StringToken asNameToken = astInst.getAsName();
StringToken importResourceToken = astInst.getImportName();
String importResource = importResourceToken.getValue();
String asName = asNameToken.getValue();
ImportType importType = astInst.getImportType();
//
// .导入操作
if (importType == ImportType.Resource) {
int importAddress = compilerContext.findImport(importResource);
if (importAddress < 0) {
InstQueue newMethodInst = queue.newMethodInst();
compilerContext.putImport(importResource, newMethodInst.getName());
this.loadResource(importResource, newMethodInst, compilerContext.createSegregate());
importAddress = newMethodInst.getName();
}
instLocation(queue, importResourceToken);
queue.inst(M_REF, importAddress);
//
} else if (importType == ImportType.ClassType) {
instLocation(queue, importResourceToken);
queue.inst(M_TYP, importResource);
} else {
throw new QueryCompilerException("import compiler failed -> importType undefined");
}
//
// .导入对象保存到堆
int index = compilerContext.containsWithCurrent(asName);
if (index < 0) {
index = compilerContext.push(asName);
}
instLocation(queue, asNameToken);
queue.inst(STORE, index);
}
private void loadResource(String importName, InstQueue queue, CompilerContext compilerContext) {
// .parser资源
RootBlockSet queryModel = null;
try {
InputStream inputStream = Objects.requireNonNull(compilerContext.findResource(importName), "import resource '" + importName + "' not found.");
queryModel = (RootBlockSet) QueryHelper.queryParser(inputStream);
} catch (Exception e) {
throw ExceptionUtils.toRuntimeException(e, throwable -> new QueryCompilerException("import compiler failed -> parser failed.", throwable));
}
// 编译资源
compilerContext.findInstCompilerByInst(queryModel).doCompiler(queue);
}
}