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

import com.sun.tools.internal.xjc.generator.bean.ClassOutlineImpl;
import com.sun.tools.internal.xjc.model.CPropertyInfo;
import com.sun.tools.internal.xjc.outline.FieldOutline;

FieldRenderer for possibly constant field. 

Since we don't know if the constant can be actually generated until
we get to the codemodel building phase, this renderer lazily
determines if it wants to generate a constant field or a normal property.
Author:
Kohsuke Kawaguchi/**
 * {@link FieldRenderer} for possibly constant field.
 *
 * <p>
 * Since we don't know if the constant can be actually generated until
 * we get to the codemodel building phase, this renderer lazily
 * determines if it wants to generate a constant field or a normal property.
 *
 * @author Kohsuke Kawaguchi
 */
final class ConstFieldRenderer implements FieldRenderer {

    private final FieldRenderer fallback;

    protected ConstFieldRenderer(FieldRenderer fallback) {
        this.fallback = fallback;
    }

    public FieldOutline generate(ClassOutlineImpl outline, CPropertyInfo prop) {
        if(prop.defaultValue.compute(outline.parent())==null)
            return fallback.generate(outline, prop);
        else
            return new ConstField(outline,prop);
    }
}