/**
* 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.ftlines.metagen.processor.tree.visitor;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Stack;
import javax.annotation.processing.ProcessingEnvironment;
import javax.lang.model.element.Element;
import javax.lang.model.element.TypeElement;
import javax.tools.JavaFileManager.Location;
import javax.tools.JavaFileObject;
import javax.tools.Diagnostic.Kind;
import javax.tools.StandardLocation;
import net.ftlines.metagen.processor.Constants;
import net.ftlines.metagen.processor.model.QualifiedName;
import net.ftlines.metagen.processor.model.TypeResolver;
import net.ftlines.metagen.processor.model.Visibility;
import net.ftlines.metagen.processor.tree.AbstractBean;
import net.ftlines.metagen.processor.tree.BeanSpace;
import net.ftlines.metagen.processor.tree.NestedBean;
import net.ftlines.metagen.processor.tree.Property;
import net.ftlines.metagen.processor.tree.TopLevelBean;
import net.ftlines.metagen.processor.tree.Visitor;
import net.ftlines.metagen.processor.util.Logger;
import net.ftlines.metagen.processor.util.Optional;
import net.ftlines.metagen.processor.util.SourceWriter;
public class CodeGeneratingVisitor implements Visitor
{
private final ProcessingEnvironment env;
private SourceWriter writer;
private Stack<List<Property>> properties = new Stack<List<Property>>();
private Stack<AbstractBean> beans = new Stack<AbstractBean>();
private final Logger logger=new Logger(getClass());
public CodeGeneratingVisitor(ProcessingEnvironment env)
{
this.env = env;
}
@Override
public void enterBeanSpace(BeanSpace space)
{
}
@Override
public void exitBeanSpace(BeanSpace space)
{
}
@Override
public boolean enterTopLevelBean(TopLevelBean node)
{
TypeElement element = node.getElement();
//env.getFiler().getResource(StandardLocation.SOURCE_OUTPUT, element., arg2)
try
{
QualifiedName name = Constants.getMetaClassName(node.getElement());
logger.log("Generating source file for: %s", name.getQualified());
logger.log(" Found: %d inner beans", node.getNestedBeans().size());
JavaFileObject source = env.getFiler().createSourceFile(name.getQualified(), node.getElement());
writer = new SourceWriter(source.openOutputStream());
writer.header(node.getName().getNamespace());
writer.line();
Optional<QualifiedName> scn = Optional.of(node.getSuperclass().isSet()
? Constants.getMetaClassName(node.getSuperclass().get().getElement()) : null);
writer.startClass(Visibility.PUBLIC, name.getLocal(), scn);
logger.log(" Writing out top level class: %s", name.getLocal());
afterEnterBean(node);
return true;
}
catch (IOException e)
{
env.getMessager().printMessage(Kind.WARNING, "Error writing meta source for: "+element.getQualifiedName()+", skipping");
logger.log(" Error: %s", e.getMessage());
return false;
}
}
@Override
public void exitTopLevel(TopLevelBean node)
{
try
{
beforeExitBean(node);
writer.endClass();
writer.flush();
writer.close();
}
catch (IOException e)
{
// TODO handle this
throw new RuntimeException(e);
}
}
@Override
public void enterNestedBean(NestedBean node)
{
try
{
QualifiedName name = Constants.getMetaClassName(node.getElement());
Optional<QualifiedName> scn = Optional.of(node.getSuperclass().isSet()
? Constants.getMetaClassName(node.getSuperclass().get().getElement()) : null);
writer.startNestedClass(Visibility.PUBLIC, name.getLocal(), scn);
logger.log(" Writing out inner class: %s", name.getLocal());
afterEnterBean(node);
}
catch (IOException e)
{
throw new RuntimeException(e);
}
}
@Override
public void exitNestedBean(NestedBean node)
{
try
{
beforeExitBean(node);
writer.endClass();
}
catch (IOException e)
{
throw new RuntimeException(e);
}
}
@Override
public void enterProperty(Property node)
{
properties.peek().add(node);
Element element = node.getAccessor();
String type = node.getType().accept(new TypeResolver(), null);
Visibility visibility = node.getVisibility();
QualifiedName containerName = new QualifiedName(node.getContainer());
try
{
int hasGetter = 0;
if (node.getGetter() != null)
{
if (node.getGetter().getSimpleName().toString().startsWith("get"))
{
hasGetter = 1;
}
else
{
hasGetter = 2;
}
}
String setterName = name(node.getSetter());
String getterName = name(node.getGetter());
String fieldName = name(node.getField());
if (node.isDeprecated())
{
writer.line("@Deprecated");
}
writer.line("%s static final %s<%s,%s> %s = new %s(\"%s\", %s.class, %s, %s, %s);",
visibility.getKeyword(), Constants.SINGULAR, containerName.getQualified(), type, node.getHandle(),
Constants.SINGULAR, node.getName(), beans.peek().getName().getQualified(), fieldName, getterName,
setterName);
}
catch (IOException e)
{
throw new RuntimeException(e);
}
}
private static String name(Element e)
{
return e == null ? "null" : "\"" + e.getSimpleName().toString() + "\"";
}
@Override
public void exitProperty(Property node)
{
}
private void beforeExitBean(AbstractBean node) throws IOException
{
writer.line();
writer.startNestedClass(node.getVisibility(), "C", Optional.<QualifiedName> ofNull());
writer.line("%s static final String name=\"%s\";", node.getVisibility().getKeyword(), node.getName()
.getQualified());
writer.line("%s static final String simpleName=\"%s\";", node.getVisibility().getKeyword(), node.getName()
.getLocal());
writer.endClass();
writer.line();
Optional<QualifiedName> scn = Optional.of(node.getSuperclass().isSet() ? new QualifiedName(
Constants.getMetaClassName(node.getSuperclass().get().getElement()).getQualified() + ".P") : null);
writer.startNestedClass(node.getVisibility(), "P", scn);
for (Property property : properties.peek())
{
writer.line("%s static final String %s=\"%s\";", property.getVisibility().getKeyword(),
property.getHandle(), property.getHandle());
}
properties.pop();
writer.endClass();
beans.pop();
}
private void afterEnterBean(AbstractBean node) throws IOException
{
beans.push(node);
properties.push(new ArrayList<Property>());
}
}