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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 1997-2017 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://oss.oracle.com/licenses/CDDL+GPL-1.1
 * or LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at LICENSE.txt.
 *
 * GPL Classpath Exception:
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 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
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 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
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 */

package com.sun.tools.xjc.generator.bean.field;

import java.util.List;

import com.sun.codemodel.JBlock;
import com.sun.codemodel.JConditional;
import com.sun.codemodel.JExpr;
import com.sun.codemodel.JExpression;
import com.sun.codemodel.JMethod;
import com.sun.codemodel.JType;
import com.sun.codemodel.JVar;
import com.sun.tools.xjc.generator.bean.ClassOutlineImpl;
import com.sun.tools.xjc.generator.bean.MethodWriter;
import com.sun.tools.xjc.model.CPropertyInfo;
import com.sun.tools.xjc.outline.FieldAccessor;
import com.sun.xml.bind.api.impl.NameConverter;

/**
 * Realizes a property through one getter and one setter.
 * This renders:
 * 
 *  * T' field;
 * T getXXX() { ... }
 * void setXXX(T value) { ... }
 * 
 *
 * 
 * Normally T'=T, but under some tricky circumstances they could be different
 * (like T'=Integer, T=int.)
 *
 * This realization is only applicable to fields with (1,1)
 * or (0,1) multiplicity.
 * 
 * @author
 *     Kohsuke Kawaguchi ([email protected])
 */
public class SingleField extends AbstractFieldWithVar {

    protected SingleField(ClassOutlineImpl context, CPropertyInfo prop) {
        this(context,prop,false);
    }

    /**
     *
     * @param forcePrimitiveAccess
     *      forces the setter/getter to expose the primitive type.
     *      it's a pointless customization, but it's nevertheless in the spec.
     */
    protected SingleField(ClassOutlineImpl context, CPropertyInfo prop, boolean forcePrimitiveAccess ) {
        super(context, prop);
        assert !exposedType.isPrimitive() && !implType.isPrimitive();
        
        createField();
        
        MethodWriter writer = context.createMethodWriter();
        NameConverter nc = context.parent().getModel().getNameConverter();

        // [RESULT]
        // Type getXXX() {
        // #ifdef default value
        //     if(value==null)
        //         return defaultValue;
        // #endif
        //     return value;
        // }
        JExpression defaultValue = null;
        if(prop.defaultValue!=null)
            defaultValue = prop.defaultValue.compute(outline.parent());

        // if Type is a wrapper and we have a default value,
        // we can use the primitive type.
        JType getterType;
        if (getOptions().enableIntrospection) {
            if (forcePrimitiveAccess)
                getterType = exposedType.unboxify();
            else
                getterType = exposedType;
        } else {
            if (defaultValue != null || forcePrimitiveAccess)
                getterType = exposedType.unboxify();
            else
                getterType = exposedType;
        }

        JMethod $get = writer.declareMethod( getterType,getGetterMethod() );
        String javadoc = prop.javadoc;
        if(javadoc.length()==0)
            javadoc = Messages.DEFAULT_GETTER_JAVADOC.format(nc.toVariableName(prop.getName(true)));
        writer.javadoc().append(javadoc);


        if(defaultValue==null) {
            $get.body()._return(ref());
        } else {
            JConditional cond = $get.body()._if(ref().eq(JExpr._null()));
            cond._then()._return(defaultValue);
            cond._else()._return(ref());
        }

        List