FieldAccessorUtils.java

package org.jvnet.jaxb2_commons.util;

import com.sun.codemodel.JDefinedClass;
import com.sun.codemodel.JFieldVar;
import com.sun.codemodel.JMethod;
import com.sun.codemodel.JType;
import com.sun.tools.xjc.outline.FieldOutline;

public class FieldAccessorUtils {

	private static final JType[] NONE = new JType[0];

	public static JMethod getter(FieldOutline fieldOutline) {
		final JDefinedClass theClass = fieldOutline.parent().implClass;
		final String publicName = fieldOutline.getPropertyInfo().getName(true);
		final JMethod getgetter = theClass.getMethod("get" + publicName, NONE);
		if (getgetter != null) {
			return getgetter;
		} else {
			final JMethod isgetter = theClass
					.getMethod("is" + publicName, NONE);
			if (isgetter != null) {
				return isgetter;
			} else {
				return null;
			}
		}
	}

	/**
	 * Returns the <code>isSetProperty()</code> method for the given field
	 * outline or <code>null</code> if no such method exists.
	 * 
	 * @param fieldOutline
	 *            field outline.
	 * @return The <code>isSetProperty()</code> method for the given field
	 *         outline or <code>null</code> if no such method exists.
	 */
	public static JMethod issetter(FieldOutline fieldOutline) {
		final JDefinedClass theClass = fieldOutline.parent().implClass;
		final String publicName = fieldOutline.getPropertyInfo().getName(true);
		final String name = "isSet" + publicName;
		return theClass.getMethod(name, NONE);
	}

	/**
	 * Returns the field for the given field outline or <code>null</code> if no
	 * such field exists.
	 * 
	 * @param fieldOutline
	 *            field outline.
	 * @return The field for the given field outline or <code>null</code> if no
	 *         such field exists.
	 */
	public static JFieldVar field(FieldOutline fieldOutline) {
		final JDefinedClass theClass = fieldOutline.parent().implClass;
		return theClass.fields().get(
				fieldOutline.getPropertyInfo().getName(false));
	}

	/**
	 * Returns the <code>setProperty(...)</code> method for the given field
	 * outline or <code>null</code> if no such method exists.
	 * 
	 * @param fieldOutline
	 *            field outline.
	 * @return The <code>setProperty(...)</code> method for the given field
	 *         outline or <code>null</code> if no such method exists.
	 */
	public static JMethod setter(FieldOutline fieldOutline) {

		final JMethod getter = getter(fieldOutline);
		final JType type = getter != null ? getter.type() : fieldOutline
				.getRawType();
		final JDefinedClass theClass = fieldOutline.parent().implClass;
		final String publicName = fieldOutline.getPropertyInfo().getName(true);
		final String name = "set" + publicName;
		return theClass.getMethod(name, new JType[] { type });
	}

}