org.apache.cocoon.forms.binding.JavaScriptJXPathBinding.java Source code

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Here is the source code for org.apache.cocoon.forms.binding.JavaScriptJXPathBinding.java

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/*
 * Copyright 1999-2004 The Apache Software Foundation.
 * 
 * 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.apache.cocoon.forms.binding;

import java.util.Iterator;
import java.util.Map;

import org.apache.avalon.framework.CascadingRuntimeException;
import org.apache.avalon.framework.context.Context;
import org.apache.cocoon.components.ContextHelper;
import org.apache.cocoon.components.flow.javascript.ScriptableMap;
import org.apache.cocoon.forms.formmodel.Widget;
import org.apache.cocoon.forms.util.JavaScriptHelper;
import org.apache.commons.jxpath.JXPathContext;
import org.apache.commons.jxpath.Pointer;
import org.mozilla.javascript.Function;
import org.mozilla.javascript.Scriptable;

/**
 *
 * @version $Id: JavaScriptJXPathBinding.java 359084 2005-12-26 18:21:33Z cziegeler $
 */
public class JavaScriptJXPathBinding extends JXPathBindingBase {

    private final Context avalonContext;
    private final String id;
    private final String path;
    private final Function loadScript;
    private final Function saveScript;
    private final Scriptable childBindings;
    private final Map childBindingsMap;

    final static String[] LOAD_PARAMS = { "widget", "jxpathPointer", "jxpathContext", "childBindings" };
    final static String[] SAVE_PARAMS = { "widget", "jxpathPointer", "jxpathContext", "childBindings" };

    public JavaScriptJXPathBinding(Context context, JXPathBindingBuilderBase.CommonAttributes commonAtts, String id,
            String path, Function loadScript, Function saveScript, Map childBindings) {
        super(commonAtts);
        this.id = id;
        this.path = path;
        this.loadScript = loadScript;
        this.saveScript = saveScript;
        this.avalonContext = context;

        // Set parent on child bindings
        for (Iterator iter = childBindings.values().iterator(); iter.hasNext();) {
            ((Binding) iter.next()).setParent(this);
        }

        this.childBindingsMap = childBindings;
        this.childBindings = new ScriptableMap(childBindings);
    }

    public String getPath() {
        return path;
    }

    public String getId() {
        return id;
    }

    public Context getContext() {
        return avalonContext;
    }

    public Function getLoadScript() {
        return loadScript;
    }

    public Function getSaveScript() {
        return saveScript;
    }

    public Map getChildBindingsMap() {
        return childBindingsMap;
    }

    public void doLoad(Widget frmModel, JXPathContext jctx) {
        if (this.loadScript != null) {
            Widget widget = selectWidget(frmModel, this.id);

            // Move to widget context
            Pointer pointer = jctx.getPointer(this.path);

            Map objectModel = ContextHelper.getObjectModel(this.avalonContext);

            try {
                JXPathContext newCtx = pointer.getNode() == null ? null : jctx.getRelativeContext(pointer);

                JavaScriptHelper.callFunction(this.loadScript, widget,
                        new Object[] { widget, pointer, newCtx, this.childBindings }, objectModel);

            } catch (RuntimeException re) {
                // rethrow
                throw re;
            } catch (Exception e) {
                throw new CascadingRuntimeException("Error invoking JavaScript event handler", e);
            }
        } else {
            if (this.getLogger().isInfoEnabled()) {
                this.getLogger().info(
                        "[Javascript Binding] - loadForm: No javascript code avaliable. Widget id=" + this.getId());
            }
        }
    }

    public void doSave(Widget frmModel, JXPathContext jctx) throws BindingException {
        if (this.saveScript != null) {
            Widget widget = selectWidget(frmModel, this.id);

            // Move to widget context and create the path if needed
            Pointer pointer = jctx.createPath(this.path);
            JXPathContext widgetCtx = jctx.getRelativeContext(pointer);
            try {
                Map objectModel = ContextHelper.getObjectModel(this.avalonContext);

                JavaScriptHelper.callFunction(this.saveScript, widget,
                        new Object[] { widget, pointer, widgetCtx, this.childBindings }, objectModel);

            } catch (RuntimeException re) {
                // rethrow
                throw re;
            } catch (Exception e) {
                throw new CascadingRuntimeException("Error invoking JavaScript event handler", e);
            }
        } else {
            if (this.getLogger().isInfoEnabled()) {
                this.getLogger().info(
                        "[Javascript Binding] - saveForm: No code avaliable on the javascript binding with id \""
                                + this.getId() + "\"");
            }
        }
    }
}