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

/**
 * Copyright 2011-2018 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.
 */
package org.primefaces.extensions.component.parameters;

import javax.el.ValueExpression;

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

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

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

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

        assignTo;

        private String toString;

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

        PropertyKeys() {
        }

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

    public AssignableParameter() {
        setRendererType(null);
    }

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

    public ValueExpression getAssignTo() {
        ValueExpression expression = (ValueExpression) getStateHelper().eval(PropertyKeys.assignTo, null);
        if (expression == null) {
            expression = getValueExpression(PropertyKeys.assignTo.toString());
        }

        return expression;
    }

    public void setAssignTo(final ValueExpression assignTo) {
        getStateHelper().put(PropertyKeys.assignTo, assignTo);
    }

    /**
     * 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)) {
            return getAssignTo();
        }

        return super.getValueExpression(name);
    }
}