/*
 * Copyright 2000-2013 JetBrains s.r.o.
 *
 * 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 org.jetbrains.plugins.groovy.lang.resolve.ast;

import com.intellij.psi.PsiMethod;
import com.intellij.psi.impl.light.LightMethodBuilder;
import org.jetbrains.plugins.groovy.lang.psi.api.statements.typedef.GrTypeDefinition;
import org.jetbrains.plugins.groovy.lang.psi.impl.PsiImplUtil;
import org.jetbrains.plugins.groovy.lang.psi.util.GroovyCommonClassNames;

import javax.annotation.Nonnull;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
import java.util.Collection;

/**
 * @author Max Medvedev
 */
public class AutoExternalizeContributor extends AstTransformContributor
{
	@Override
	public void collectMethods(@Nonnull GrTypeDefinition clazz, @Nonnull Collection<PsiMethod> collector)
	{
		if(!hasGeneratedImplementations(clazz))
		{
			return;
		}

		final LightMethodBuilder write = new LightMethodBuilder(clazz.getManager(), "writeExternal");
		write.setContainingClass(clazz);
		write.addParameter("out", ObjectOutput.class.getName());
		write.addException(IOException.class.getName());
		write.setOriginInfo("created by @AutoExternalize");
		collector.add(write);

		final LightMethodBuilder read = new LightMethodBuilder(clazz.getManager(), "readExternal");
		read.setContainingClass(clazz);
		read.addParameter("oin", ObjectInput.class.getName());
		read.setOriginInfo("created by @AutoExternalize");
		collector.add(read);
	}

	private static boolean hasGeneratedImplementations(GrTypeDefinition clazz)
	{
		return PsiImplUtil.getAnnotation(clazz, GroovyCommonClassNames.GROOVY_TRANSFORM_AUTO_EXTERNALIZE) != null;
	}
}
