DO NOT REPLY TO THIS EMAIL, BUT PLEASE POST YOUR BUG RELATED COMMENTS THROUGH THE WEB INTERFACE AVAILABLE AT <http://issues.apache.org/bugzilla/show_bug.cgi?id=29715>. ANY REPLY MADE TO THIS MESSAGE WILL NOT BE COLLECTED AND INSERTED IN THE BUG DATABASE.
http://issues.apache.org/bugzilla/show_bug.cgi?id=29715 JavaSelectionListBuilder Summary: JavaSelectionListBuilder Product: Cocoon 2 Version: Current CVS 2.1 Platform: Other OS/Version: Other Status: NEW Severity: Enhancement Priority: Other Component: CocoonForms AssignedTo: [EMAIL PROTECTED] ReportedBy: [EMAIL PROTECTED] Here goes a small contribution to the cforms block. It's a selection list builder which returns a custom class selection list. I use it to build from my DAO methods! It's syntax its something like : <fd:selection-list type="java" class="x.p.t.o.MyJavaSelectionList" nullable="false"/> -------------------------[ Start of AbstractJavaSelectionList ]---------------- /* * 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.datatype; import java.util.ArrayList; import java.util.HashMap; import java.util.Iterator; import java.util.List; import java.util.Locale; import org.apache.avalon.framework.service.ServiceException; import org.apache.avalon.framework.service.ServiceManager; import org.apache.avalon.framework.service.Serviceable; import org.apache.cocoon.forms.Constants; import org.apache.cocoon.forms.datatype.convertor.Convertor; import org.apache.cocoon.forms.datatype.convertor.DefaultFormatCache; import org.apache.cocoon.xml.AttributesImpl; import org.apache.cocoon.xml.XMLUtils; import org.xml.sax.ContentHandler; import org.xml.sax.SAXException; /** * Abstract implementation of a JavaSelectionList * * */ public abstract class AbstractJavaSelectionList implements JavaSelectionList, Serviceable { private HashMap attributes; /* (non-Javadoc) * @see org.apache.cocoon.forms.datatype.JavaSelectionList#getAttribute(java.lang.String) */ public String getAttribute(String name) { if( this.attributes==null){ return null; } return (String) this.attributes.get(name); } /* (non-Javadoc) * @see org.apache.cocoon.forms.datatype.JavaSelectionList#removeAttribute(java.lang.String) */ public void removeAttribute(String name) { if( this.attributes!=null){ this.attributes.remove(name); } } /* (non-Javadoc) * @see org.apache.cocoon.forms.datatype.JavaSelectionList#setAttribute(java.lang.String, java.lang.String) */ public void setAttribute(String name, String value) { if( this.attributes==null){ this.attributes=new HashMap(); } this.attributes.put(name, value); } protected Datatype datatype; private List items = new ArrayList(); private boolean nullable = false; protected ServiceManager manager = null; private boolean rebuilding = true; /* (non-Javadoc) * @see org.apache.avalon.framework.service.Serviceable#service(org.apache.avalon.framework.service.ServiceManager) */ public void service(ServiceManager manager) throws ServiceException { this.manager=manager; } /* (non-Javadoc) * @see org.apache.cocoon.forms.datatype.JavaSelectionList#isNullable() */ public boolean isNullable() { return this.nullable; } /* (non-Javadoc) * @see org.apache.cocoon.forms.datatype.JavaSelectionList#setDatatype(org.apache.cocoon.forms.datatype.Datatype) */ public void setDatatype(Datatype datatype) { this.datatype=datatype; } /* (non-Javadoc) * @see org.apache.cocoon.forms.datatype.JavaSelectionList#setNullable(boolean) */ public void setNullable(boolean nullable) { this.nullable=nullable; } /* * (non-Javadoc) * * @see org.apache.cocoon.forms.datatype.SelectionList#getDatatype() */ public Datatype getDatatype() { return this.datatype; } public void rebuild() { this.rebuilding = true; } /*public void prebuild() { try { this.items.clear(); this.build(); } catch (Exception e) { e.printStackTrace(); } this.rebuilding = false; }*/ public void generateSaxFragment(ContentHandler contentHandler, Locale locale) throws SAXException { if (this.rebuilding) try { this.items.clear(); this.rebuilding = this.build(); } catch (Exception e) { e.printStackTrace(); } Convertor.FormatCache formatCache = new DefaultFormatCache(); contentHandler.startElement(Constants.INSTANCE_NS, SELECTION_LIST_EL, Constants.INSTANCE_PREFIX_COLON + SELECTION_LIST_EL, XMLUtils.EMPTY_ATTRIBUTES); if (nullable) { AttributesImpl voidAttrs = new AttributesImpl(); voidAttrs.addCDATAAttribute("value", ""); contentHandler.startElement(Constants.INSTANCE_NS, ITEM_EL, Constants.INSTANCE_PREFIX_COLON + ITEM_EL, voidAttrs); contentHandler.endElement(Constants.INSTANCE_NS, ITEM_EL, Constants.INSTANCE_PREFIX_COLON + ITEM_EL); } Iterator itemIt = items.iterator(); while (itemIt.hasNext()) { SelectionListItem item = (SelectionListItem) itemIt.next(); item.generateSaxFragment(contentHandler, locale, formatCache); } contentHandler.endElement(Constants.INSTANCE_NS, SELECTION_LIST_EL, Constants.INSTANCE_PREFIX_COLON + SELECTION_LIST_EL); this.rebuilding = true; } /** * */ protected abstract boolean build() throws Exception; /** * Adds a new item to this selection list. * * @param value * a value of the correct type (i.e. the type with which this * selectionlist is associated) * @param label * a SAX-fragment such as a * [EMAIL PROTECTED] org.apache.cocoon.xml.SaxBuffer}, can be null */ protected void addItem(Object value, String label) { items.add(new SelectionListItem(value, label)); } protected List getItems() { return items; } public Object getFirst() { if (items.isEmpty()) return null; SelectionListItem item = (SelectionListItem) items.get(0); return item.value; } private final class SelectionListItem { private final Object value; private final String label; public SelectionListItem(Object value, String label) { this.value = value; this.label = label; } public Object getValue() { return value; } public void generateSaxFragment(ContentHandler contentHandler, Locale locale, Convertor.FormatCache formatCache) throws SAXException { AttributesImpl itemAttrs = new AttributesImpl(); String stringValue; if (this.value == null) { stringValue = ""; } else { stringValue = datatype.getConvertor().convertToString(value, locale, formatCache); } itemAttrs.addCDATAAttribute("value", stringValue); contentHandler.startElement(Constants.INSTANCE_NS, ITEM_EL, Constants.INSTANCE_PREFIX_COLON + ITEM_EL, itemAttrs); contentHandler.startElement(Constants.INSTANCE_NS, LABEL_EL, Constants.INSTANCE_PREFIX_COLON + LABEL_EL, XMLUtils.EMPTY_ATTRIBUTES); if (label == null) { contentHandler.characters(stringValue.toCharArray(), 0, stringValue.length()); } else { contentHandler.characters(label.toCharArray(), 0, label .length()); } contentHandler.endElement(Constants.INSTANCE_NS, LABEL_EL, Constants.INSTANCE_PREFIX_COLON + LABEL_EL); contentHandler.endElement(Constants.INSTANCE_NS, ITEM_EL, Constants.INSTANCE_PREFIX_COLON + ITEM_EL); } } } ---------------------------[ End of AbstractJavaSelectionList ]---------------- ---------------------------[ Start of JavaSelectionList ]---------------------- /* * 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.datatype; /** * A selection list that takes its values from the custom java class itself. * * */ public interface JavaSelectionList extends SelectionList{ void setDatatype(Datatype datatype); boolean isNullable(); void setNullable(boolean nullable); String getAttribute(String name); void setAttribute(String name, String value); void removeAttribute(String name); } ---------------------------[ End of JavaSelectionList ]------------------------ ---------------------[ Start of JavaSelectionListBuilder ]--------------------- /* * 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.datatype; import org.apache.avalon.framework.context.Context; import org.apache.avalon.framework.context.ContextException; import org.apache.avalon.framework.context.Contextualizable; import org.apache.avalon.framework.logger.AbstractLogEnabled; import org.apache.avalon.framework.service.ServiceException; import org.apache.avalon.framework.service.ServiceManager; import org.apache.avalon.framework.service.Serviceable; import org.apache.cocoon.components.LifecycleHelper; import org.apache.cocoon.forms.util.DomHelper; import org.w3c.dom.Element; import org.w3c.dom.NamedNodeMap; import org.w3c.dom.Node; /** * Builds [EMAIL PROTECTED] SelectionList}s from a JavaSelectionList class * * */ public class JavaSelectionListBuilder extends AbstractLogEnabled implements SelectionListBuilder, Serviceable, Contextualizable { private ServiceManager manager; private Context context; /* * (non-Javadoc) * * @see org.apache.cocoon.forms.datatype.SelectionListBuilder#build(org.w3c.dom.Element, * org.apache.cocoon.forms.datatype.Datatype) */ public SelectionList build(Element selectionListElement, Datatype datatype) throws Exception { String className = DomHelper .getAttribute(selectionListElement, "class"); boolean nullable = DomHelper.getAttributeAsBoolean( selectionListElement, "nullable", true); try { Class clasz = Class.forName(className); if (JavaSelectionList.class.isAssignableFrom(clasz)) { JavaSelectionList list = (JavaSelectionList) clasz.newInstance(); LifecycleHelper.setupComponent(list,getLogger(),this.context, this.manager,null, null, true); list.setDatatype(datatype); list.setNullable(nullable); NamedNodeMap attrs = selectionListElement.getAttributes(); int size=attrs.getLength(); for( int i=0; i< size; i++){ Node attr = attrs.item(i); String name=attr.getNodeName(); //if( !"class".equals(name) && !"nullable".equals(name)){ list.setAttribute(name, attr.getNodeValue()); //} } return list; } return new StaticSelectionList(datatype); } catch (ClassNotFoundException e) { e.printStackTrace(); throw e; } catch (InstantiationException e) { e.printStackTrace(); throw e; } catch (IllegalAccessException e) { e.printStackTrace(); throw e; } } /* * (non-Javadoc) * * @see org.apache.avalon.framework.service.Serviceable#service(org.apache.avalon.framework.service.ServiceManager) */ public void service(ServiceManager manager) throws ServiceException { this.manager = manager; } /* * (non-Javadoc) * * @see org.apache.avalon.framework.context.Contextualizable#contextualize(org.apache.avalon.framework.context.Context) */ public void contextualize(Context context) throws ContextException { this.context = context; } } -----------------------[ End of JavaSelectionListBuilder ]---------------------
