de.alpharogroup.wicket.behaviors.JqueryStatementsBehavior.java Source code

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Here is the source code for de.alpharogroup.wicket.behaviors.JqueryStatementsBehavior.java

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/**
 * Copyright (C) 2010 Asterios Raptis
 *
 * 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 de.alpharogroup.wicket.behaviors;

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

import org.apache.log4j.Logger;
import org.apache.wicket.Component;
import org.apache.wicket.behavior.Behavior;
import org.apache.wicket.markup.head.IHeaderResponse;
import org.apache.wicket.markup.head.OnDomReadyHeaderItem;
import org.apache.wicket.util.lang.Args;
import org.odlabs.wiquery.core.javascript.ChainableStatement;
import org.odlabs.wiquery.core.javascript.JsStatement;

import lombok.Getter;

/**
 * The Class {@link JqueryStatementsBehavior} can create js statements from the given
 * {@link ChainableStatement} objects.
 */
public class JqueryStatementsBehavior extends Behavior {
    /** The Constant logger. */
    protected static final Logger LOGGER = Logger.getLogger(JqueryStatementsBehavior.class.getName());

    /** The Constant serialVersionUID. */
    private static final long serialVersionUID = 1L;

    /** The chainable statement. */
    private List<ChainableStatement> chainableStatement;

    /**
     * the rendered statement.
     */
    @Getter
    private CharSequence renderedStatement;

    /**
     * Flag if it is rendered.
     */
    @Getter
    private boolean rendered;

    /**
     * Instantiates a new {@link JqueryStatementsBehavior}.
     */
    public JqueryStatementsBehavior() {
        this.chainableStatement = new ArrayList<>();
    }

    /**
     * Instantiates a new {@link JqueryStatementsBehavior}.
     *
     * @param chainableStatements
     *            the chainable statement objects.
     */
    public JqueryStatementsBehavior(final List<ChainableStatement> chainableStatements) {
        Args.notNull(chainableStatements, "chainableStatement");
        this.chainableStatement = chainableStatements;
    }

    /**
     * Adds the given {@link ChainableStatement} to the list and returns this object.
     *
     * @param chainableStatement
     *            the chainable statement to add
     * @return the jquery statements behavior
     */
    public JqueryStatementsBehavior add(final ChainableStatement chainableStatement) {
        this.chainableStatement.add(chainableStatement);
        return this;
    }

    /**
     * Factory method to create the rendered statement.
     *
     * @param component
     *            the component
     * @return the char sequence
     */
    public CharSequence newRenderedStatement(final Component component) {
        JsStatement statement;
        if (component != null) {
            component.setOutputMarkupId(true);
            statement = new JsStatement().$(component);
        } else {
            statement = new JsStatement();
        }

        for (final ChainableStatement defaultChainableStatement : chainableStatement) {
            statement.chain(defaultChainableStatement);
        }
        this.renderedStatement = statement.render();
        this.rendered = true;
        return this.renderedStatement;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void renderHead(final Component component, final IHeaderResponse response) {
        super.renderHead(component, response);
        final CharSequence renderedStatement = newRenderedStatement(component);
        response.render(OnDomReadyHeaderItem.forScript(renderedStatement));
    }
}