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TemplateClassDefinition.java
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TemplateClassDefinition.java
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/*******************************************************************************
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.drill.exec.compile;
import org.apache.drill.exec.compile.sig.CodeGeneratorSignature;
import org.apache.drill.exec.compile.sig.DefaultGeneratorSignature;
import org.apache.drill.exec.compile.sig.SignatureHolder;
public class TemplateClassDefinition<T>{
static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(TemplateClassDefinition.class);
private final Class<T> externalInterface;
private final String templateClassName;
private final Class<?> internalInterface;
private final SignatureHolder signature;
public TemplateClassDefinition(Class<T> externalInterface, String templateClassName, Class<?> internalInterface) {
this(externalInterface, templateClassName, internalInterface, DefaultGeneratorSignature.class);
}
public <X extends CodeGeneratorSignature> TemplateClassDefinition(Class<T> externalInterface, String templateClassName, Class<?> internalInterface, Class<X> signature) {
super();
this.externalInterface = externalInterface;
this.templateClassName = templateClassName;
this.internalInterface = internalInterface;
SignatureHolder holder = null;
try{
holder = new SignatureHolder(signature);
}catch(Exception ex){
logger.error("Failure while trying to build signature holder for signature. {}", signature.getSimpleName(), ex);
}
this.signature = holder;
}
public Class<T> getExternalInterface() {
return externalInterface;
}
public Class<?> getInternalInterface() {
return internalInterface;
}
public String getTemplateClassName() {
return templateClassName;
}
public SignatureHolder getSignature(){
return signature;
}
@Override
public String toString() {
return "TemplateClassDefinition [externalInterface=" + externalInterface + ", templateClassName="
+ templateClassName + ", internalInterface=" + internalInterface + ", signature=" + signature + "]";
}
}