org.bndly.code.common.CodeGenerationObject Maven / Gradle / Ivy
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package org.bndly.code.common;
/*-
* #%L
* Code Common
* %%
* Copyright (C) 2013 - 2020 Cybercon GmbH
* %%
* 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 java.lang.reflect.Constructor;
public abstract class CodeGenerationObject {
private CodeGenerationContext context;
private CodeGenerationObject owner;
public CodeGenerationContext getContext() {
if (context == null) {
if (owner != null) {
return owner.getContext();
} else {
throw new IllegalStateException("CodeGenerationContext could not be retrieved.");
}
} else {
return context;
}
}
protected void setContext(CodeGenerationContext context) {
this.context = context;
}
protected CodeGenerationObject getOwner() {
return owner;
}
public T create(Class type) {
T instance = null;
try {
instance = type.newInstance();
CodeGenerationObject cgo = instance;
cgo.owner = this;
return instance;
} catch (InstantiationException | IllegalAccessException e) {
throw new IllegalStateException(type.getSimpleName() + " could not be instantiated.", e);
}
}
public T create(Class type, Object...constructorParameters) {
T instance = null;
int numberOfParameters = 0;
if (constructorParameters != null) {
numberOfParameters = constructorParameters.length;
}
try {
Constructor[] constructors = type.getConstructors();
for (Constructor constructor : constructors) {
Class[] parameterTypes = constructor.getParameterTypes();
int tmp = 0;
if (parameterTypes != null) {
tmp = parameterTypes.length;
}
if (numberOfParameters == tmp) {
instance = type.cast(constructor.newInstance(constructorParameters));
}
}
if (instance == null) {
instance = type.newInstance();
}
CodeGenerationObject cgo = instance;
cgo.owner = this;
return instance;
} catch (Exception e) {
throw new IllegalStateException(type.getSimpleName() + " could not be instantiated.", e);
}
}
public boolean is(Class type) {
return (type.isAssignableFrom(getClass()));
}
public T as(Class type) {
return type.cast(this);
}
}