org.primefaces.extensions.component.parameters.MethodParameter Maven / Gradle / Ivy

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/*
 * Copyright 2011-2015 PrimeFaces Extensions
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * $Id$
 */

package org.primefaces.extensions.component.parameters;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import javax.el.ValueExpression;
import javax.faces.component.UIComponent;

import org.primefaces.extensions.component.base.AbstractParameter;
import org.primefaces.extensions.util.DummyValueExpression;

/**
 * Component class for the MethodParameter component.
 *
 * @author  Thomas Andraschko / last modified by $Author$
 * @version $Revision$
 * @since   0.5
 */
public class MethodParameter extends AbstractParameter {

	public static final String COMPONENT_TYPE = "org.primefaces.extensions.component.MethodParameter";

	/**
	 * Properties that are tracked by state saving.
	 *
	 * @author  Thomas Andraschko / last modified by $Author$
	 * @version $Revision$
	 */
	protected enum PropertyKeys {

		type;

		private String toString;

		PropertyKeys(final String toString) {
			this.toString = toString;
		}

		PropertyKeys() {
		}

		@Override
		public String toString() {
			return ((this.toString != null) ? this.toString : super.toString());
		}
	}

	public MethodParameter() {
		setRendererType(null);
	}

	@Override
	public String getFamily() {
		return COMPONENT_FAMILY;
	}

	public String getType() {
		return (String) getStateHelper().eval(PropertyKeys.type, null);
	}

	public void setType(final String type) {
		getStateHelper().put(PropertyKeys.type, type);
	}

	/**
	 * Enables converters to get the value type from the "value" expression.
	 *
	 * @param  name DOCUMENT_ME
	 * @return DOCUMENT_ME
	 */
	@Override
	public ValueExpression getValueExpression(final String name) {
		if ("value".equals(name)) {
			//get type from parent component
			//MethodSignatureTagHandler stores all parameters to the parent component
			final UIComponent parent = getParent();
			final Map parentAttribtues = parent.getAttributes();
			final Class[] parameterTypes =
					(Class[]) parentAttribtues.get(MethodSignatureTagHandler.PARAMETERS_TYPES_ATTRIBUTE_NAME);
			final Class parameterType = parameterTypes[parent.getChildren().indexOf(this)];

			return new DummyValueExpression(parameterType);
		}

		return super.getValueExpression(name);
	}
}