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 * 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

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

import com.sun.codemodel.internal.JBlock;

import com.sun.codemodel.internal.JCodeModel;

import com.sun.codemodel.internal.JExpr;

import com.sun.codemodel.internal.JExpression;

import com.sun.codemodel.internal.JType;

import com.sun.codemodel.internal.JVar;

import com.sun.tools.internal.xjc.generator.bean.ClassOutlineImpl;

import com.sun.tools.internal.xjc.generator.bean.MethodWriter;

import com.sun.tools.internal.xjc.model.CPropertyInfo;

import com.sun.tools.internal.xjc.outline.FieldAccessor;

import com.sun.tools.internal.xjc.outline.FieldOutline;

/**

 *

 *

 * @author

 *     Kohsuke Kawaguchi (kohsuke.kawaguchi@sun.com)

 */

public class IsSetField extends AbstractField {

    private final FieldOutline core;

    private final boolean generateUnSetMethod;

    private final boolean generateIsSetMethod;

    protected IsSetField( ClassOutlineImpl outline, CPropertyInfo prop,

            FieldOutline core, boolean unsetMethod, boolean issetMethod ) {

        super(outline,prop);

        this.core = core;

        this.generateIsSetMethod = issetMethod;

        this.generateUnSetMethod = unsetMethod;

        generate(outline,prop);

    }

    private void generate( ClassOutlineImpl outline, CPropertyInfo prop ) {

        // add isSetXXX and unsetXXX.

        MethodWriter writer = outline.createMethodWriter();

        JCodeModel codeModel = outline.parent().getCodeModel();

        FieldAccessor acc = core.create(JExpr._this());

        if( generateIsSetMethod ) {

            // [RESULT] boolean isSetXXX()

            JExpression hasSetValue = acc.hasSetValue();

            if( hasSetValue==null ) {

                // this field renderer doesn't support the isSet/unset methods generation.

                // issue an error

                throw new UnsupportedOperationException();

            }

            writer.declareMethod(codeModel.BOOLEAN,"isSet"+this.prop.getName(true))

                .body()._return( hasSetValue );

        }

        if( generateUnSetMethod ) {

            // [RESULT] void unsetXXX()

            acc.unsetValues(

                writer.declareMethod(codeModel.VOID,"unset"+this.prop.getName(true)).body() );

        }

    }

    public JType getRawType() {

        return core.getRawType();

    }

    public FieldAccessor create(JExpression targetObject) {

        return new Accessor(targetObject);

    }

    private class Accessor extends AbstractField.Accessor {

        private final FieldAccessor core;

        Accessor( JExpression $target ) {

            super($target);

            this.core = IsSetField.this.core.create($target);

        }

        public void unsetValues( JBlock body ) {

            core.unsetValues(body);

        }

        public JExpression hasSetValue() {

            return core.hasSetValue();

        }

        public void toRawValue(JBlock block, JVar $var) {

            core.toRawValue(block,$var);

        }

        public void fromRawValue(JBlock block, String uniqueName, JExpression $var) {

            core.fromRawValue(block,uniqueName,$var);

        }

    }

}