/*
 * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
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 */

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

import com.sun.codemodel.internal.JBlock;
import com.sun.codemodel.internal.JExpression;
import com.sun.codemodel.internal.JFieldRef;
import com.sun.codemodel.internal.JFieldVar;
import com.sun.codemodel.internal.JMod;
import com.sun.codemodel.internal.JType;
import com.sun.codemodel.internal.JVar;
import com.sun.tools.internal.xjc.api.SpecVersion;
import com.sun.tools.internal.xjc.generator.bean.ClassOutlineImpl;
import com.sun.tools.internal.xjc.model.CPropertyInfo;

/**
 *
 *
 * @author
 *     Kohsuke Kawaguchi (kohsuke.kawaguchi@sun.com), Martin Grebac
 */
abstract class AbstractFieldWithVar extends AbstractField {

    /**
     * Field declaration of the actual list object that we use
     * to store data.
     */
    private JFieldVar field;

    /**
     * Invoke {@link #createField()} after calling the
     * constructor.
     */
    AbstractFieldWithVar( ClassOutlineImpl outline, CPropertyInfo prop ) {
        super(outline,prop);
    }

    protected final void createField() {
        field = outline.implClass.field( JMod.PROTECTED,
            getFieldType(), prop.getName(false) );

        annotate(field);
    }

    /**
     * Gets the name of the getter method.
     *
     * <p>
     * This encapsulation is necessary because sometimes we use
     * {@code isXXXX} as the method name.
     */
    protected String getGetterMethod() {
        if (getOptions().enableIntrospection) {
            return ((getFieldType().isPrimitive() &&
                     getFieldType().boxify().getPrimitiveType()==codeModel.BOOLEAN) ?
                         "is":"get") + prop.getName(true);
        } else {
            return (getFieldType().boxify().getPrimitiveType()==codeModel.BOOLEAN?"is":"get")+prop.getName(true);
        }
    }

    /**
     * Returns the type used to store the value of the field in memory.
     */
    protected abstract JType getFieldType();

    protected JFieldVar ref() { return field; }

    public final JType getRawType() {
        return exposedType;
    }

    protected abstract class Accessor extends AbstractField.Accessor {

        protected Accessor(JExpression $target) {
            super($target);
            this.$ref = $target.ref(AbstractFieldWithVar.this.ref());
        }

        /**
         * Reference to the field bound by the target object.
         */
        protected final JFieldRef $ref;

        public final void toRawValue(JBlock block, JVar $var) {
            if (getOptions().enableIntrospection) {
                block.assign($var,$target.invoke(getGetterMethod()));
            } else {
                block.assign($var,$target.invoke(getGetterMethod()));
            }
        }

        public final void fromRawValue(JBlock block, String uniqueName, JExpression $var) {
            block.invoke($target,("set"+prop.getName(true))).arg($var);
        }
    }
}