/**
 * Copyright 2011-2015 John Ericksen
 *
 * 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.androidtransfuse.gen.variableBuilder;

import com.sun.codemodel.JExpr;
import com.sun.codemodel.JExpression;
import org.androidtransfuse.gen.InjectionBuilderContext;
import org.androidtransfuse.gen.InjectionExpressionBuilder;
import org.androidtransfuse.gen.variableDecorator.TypedExpressionFactory;
import org.androidtransfuse.model.InjectionNode;
import org.androidtransfuse.model.TypedExpression;

import javax.inject.Inject;

/**
 * @author John Ericksen
 */
public class SystemServiceVariableBuilder extends ConsistentTypeVariableBuilder {

    private static final String GET_SYSTEM_SERVICE = "getSystemService";

    private final String systemService;
    private final InjectionNode contextInjectionNode;
    private final InjectionExpressionBuilder injectionExpressionBuilder;

    @Inject
    public SystemServiceVariableBuilder(/*@Assisted*/ String systemService,
                                        /*@Assisted*/ InjectionNode contextInjectionNode,
                                        InjectionExpressionBuilder injectionExpressionBuilder,
                                        TypedExpressionFactory typedExpressionFactory) {
        super(Object.class, typedExpressionFactory);
        this.systemService = systemService;
        this.contextInjectionNode = contextInjectionNode;
        this.injectionExpressionBuilder = injectionExpressionBuilder;
    }

    @Override
    public JExpression buildExpression(InjectionBuilderContext injectionBuilderContext, InjectionNode injectionNode) {
        TypedExpression contextVar = injectionExpressionBuilder.buildVariable(injectionBuilderContext, contextInjectionNode);

        return contextVar.getExpression().invoke(GET_SYSTEM_SERVICE).arg(JExpr.lit(systemService));
    }
}