Java tutorial
/********************************************************************************** * $URL:https://source.sakaiproject.org/svn/osp/trunk/presentation/tool/src/java/org/theospi/portfolio/presentation/tool/DecoratedPage.java $ * $Id:DecoratedPage.java 9134 2006-05-08 20:28:42Z chmaurer@iupui.edu $ *********************************************************************************** * * Copyright (c) 2005, 2006, 2007, 2008 The Sakai Foundation * * Licensed under the Educational Community 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.opensource.org/licenses/ECL-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.theospi.portfolio.presentation.tool; import java.io.ByteArrayInputStream; import java.io.ByteArrayOutputStream; import java.io.IOException; import java.io.InputStream; import java.util.Collections; import org.apache.commons.lang.StringEscapeUtils; import javax.faces.context.ExternalContext; import javax.faces.context.FacesContext; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.sakaiproject.metaobj.shared.model.Id; import org.sakaiproject.tool.api.ToolSession; import org.sakaiproject.tool.cover.SessionManager; import org.theospi.portfolio.presentation.PresentationLayoutHelper; import org.theospi.portfolio.presentation.model.PresentationLayout; import org.theospi.portfolio.presentation.model.PresentationPage; import org.theospi.portfolio.shared.model.Node; import org.theospi.portfolio.style.StyleHelper; import org.theospi.portfolio.style.model.Style; /** * Created by IntelliJ IDEA. * User: John Ellis * Date: Jan 1, 2006 * Time: 7:32:11 PM * To change this template use File | Settings | File Templates. */ public class DecoratedPage implements Comparable { protected final transient Log logger = LogFactory.getLog(getClass()); private FreeFormTool parent; private PresentationPage base; private RegionMap regionMap; private boolean selected; private DecoratedLayout selectedLayout = null; private String layoutName; private String lastModified; private String expandedInformationSection = "true"; private boolean newPage = false; public DecoratedPage(PresentationPage base, FreeFormTool parent) { this.base = base; this.parent = parent; if (base.getPresentation().getLayout() != null && base.getLayout() == null) { base.setLayout(base.getPresentation().getLayout()); } initLayout(); } protected void initLayout() { if (base.getLayout() != null) { setSelectedLayout(new DecoratedLayout(parent, base.getLayout())); } } public String getStyleName() { ToolSession session = SessionManager.getCurrentToolSession(); if (session.getAttribute(StyleHelper.CURRENT_STYLE) != null) { Style style = (Style) session.getAttribute(StyleHelper.CURRENT_STYLE); base.setStyle(style); } else if (session.getAttribute(StyleHelper.UNSELECTED_STYLE) != null) { base.setStyle(null); session.removeAttribute(StyleHelper.UNSELECTED_STYLE); return ""; } if (base.getStyle() != null) return base.getStyle().getName(); return ""; } public boolean isRenderLayoutName() { getLayoutName(); return true; } public String getLayoutName() { ToolSession session = SessionManager.getCurrentToolSession(); if (session.getAttribute(PresentationLayoutHelper.CURRENT_LAYOUT) != null) { PresentationLayout layout = (PresentationLayout) session .getAttribute(PresentationLayoutHelper.CURRENT_LAYOUT); //base.setLayout(layout); clearRegionsIfDirtyLayout(layout); setSelectedLayout(new DecoratedLayout(getParent(), layout)); session.removeAttribute(PresentationLayoutHelper.CURRENT_LAYOUT); } else if (session.getAttribute(PresentationLayoutHelper.UNSELECTED_LAYOUT) != null) { //base.setLayout(null); clearRegions(); setSelectedLayout(new DecoratedLayout(getParent(), null)); session.removeAttribute(PresentationLayoutHelper.UNSELECTED_LAYOUT); setSelectedLayoutId(null); return null; } if (getSelectedLayout() != null && getSelectedLayout().getBase() != null) return getSelectedLayout().getBase().getName(); //return layoutName; setSelectedLayoutId(null); return null; } protected boolean isLayoutDirty(PresentationLayout layout) { if (getSelectedLayout() != null && getSelectedLayout().getBase() != null) return !getSelectedLayout().getBase().equals(layout); return false; } protected void clearRegionsIfDirtyLayout(PresentationLayout layout) { if (isLayoutDirty(layout)) { clearRegions(); } } protected void clearRegions() { getBase().getRegions().clear(); regionMap = null; } public void setLayoutName(String name) { this.layoutName = name; } public String getSafeTitle() { return StringEscapeUtils.escapeHtml(base.getTitle()); } public PresentationPage getBase() { return base; } public void setBase(PresentationPage base) { this.base = base; } /** * Any time this is called the calling method MUST close the input stream!! * This has the potential of causing memory leaks if the calling method does not close the stream * @return InputStream */ public InputStream getXmlFile() { InputStream inputStream = null; if (getSelectedLayout().getBase() != null) { Node node = getParent().getPresentationManager().getNode(getSelectedLayout().getBase().getXhtmlFileId(), getSelectedLayout().getBase()); inputStream = node.getInputStream(); // we want to read the entire file into memory so wo can close the inputStream // and thus release the database connection / file connection ByteArrayOutputStream bytesOS = new ByteArrayOutputStream(); int buffersize = 1024, s; byte[] buffer = new byte[buffersize]; try { while ((s = inputStream.read(buffer)) != -1) { bytesOS.write(buffer, 0, s); } inputStream.close(); inputStream = new ByteArrayInputStream(bytesOS.toByteArray()); } catch (IOException ioe) { logger.error(ioe); inputStream = null; } } return inputStream; } public boolean isXmlFileNotNull() { InputStream inputStream = getXmlFile(); boolean isNotNull = inputStream != null; if (isNotNull) { try { inputStream.close(); } catch (IOException ioe) { logger.error("Failed to close: " + ioe); } } return isNotNull; } public String getXmlFileId() { return getSelectedLayout().getBase().getId().getValue() + getSelectedLayout().getBase().getModified().toString(); } public RegionMap getRegionMap() { if (regionMap == null) { regionMap = new RegionMap(getBase()); } return regionMap; } public void setRegionMap(RegionMap regionMap) { this.regionMap = regionMap; } public FreeFormTool getParent() { return parent; } public void setParent(FreeFormTool parent) { this.parent = parent; } public String processActionArrange() { getParent().setCurrentPage(this); initLayout(); return "arrange"; } public String processActionEdit() { getParent().setCurrentPage(this); initLayout(); return "edit"; } public String processActionConfirmDelete() { getParent().setCurrentPage(this); return "confirm"; } public String processActionDelete() { getParent().deletePage(this); getParent().reorderPages(); return "main"; } public String processActionSelectStyle() { ExternalContext context = FacesContext.getCurrentInstance().getExternalContext(); ToolSession session = SessionManager.getCurrentToolSession(); session.removeAttribute(StyleHelper.CURRENT_STYLE); session.removeAttribute(StyleHelper.CURRENT_STYLE_ID); session.setAttribute(StyleHelper.STYLE_SELECTABLE, "true"); if (base.getStyle() != null) session.setAttribute(StyleHelper.CURRENT_STYLE_ID, base.getStyle().getId().getValue()); try { context.redirect("osp.style.helper/listStyle"); } catch (IOException e) { throw new RuntimeException("Failed to redirect to helper", e); } return null; } public String processActionSelectLayout() { ExternalContext context = FacesContext.getCurrentInstance().getExternalContext(); ToolSession session = SessionManager.getCurrentToolSession(); session.removeAttribute(PresentationLayoutHelper.CURRENT_LAYOUT); session.removeAttribute(PresentationLayoutHelper.CURRENT_LAYOUT_ID); session.setAttribute(PresentationLayoutHelper.LAYOUT_SELECTABLE, "true"); if (getSelectedLayout() != null && getSelectedLayout().getBase() != null) session.setAttribute(PresentationLayoutHelper.CURRENT_LAYOUT_ID, getSelectedLayout().getBase().getId().getValue()); try { context.redirect("osp.presLayout.helper/listLayout"); } catch (IOException e) { throw new RuntimeException("Failed to redirect to helper", e); } return null; } public boolean isSelected() { return selected; } public void setSelected(boolean selected) { this.selected = selected; } public DecoratedLayout getSelectedLayout() { return selectedLayout; } public void setSelectedLayout(DecoratedLayout selectedLayout) { this.selectedLayout = selectedLayout; } /** * Sets the layout to null as well * @param layoutId */ public void setSelectedLayoutId(String layoutId) { Id id = getParent().getIdManager().getId(layoutId); PresentationLayout layout = getParent().getPresentationManager().getPresentationLayout(id); setSelectedLayout(new DecoratedLayout(getParent(), layout)); } public String getSelectedLayoutId() { if (getSelectedLayout() != null && getSelectedLayout().getBase() != null) { return getSelectedLayout().getBase().getId().getValue(); } return null; } public boolean islayoutSelected() { return (getSelectedLayout() != null && getSelectedLayout().getBase() != null); } public boolean isLayoutPreviewImage() { if (islayoutSelected() && (getSelectedLayout().getPreviewImage() != null)) { return true; } return false; } public int compareTo(Object o) { DecoratedPage other = (DecoratedPage) o; return getBase().compareTo(other.getBase()); } public String pagePropertiesSaved() { getBase().setLayout(getSelectedLayout().getBase()); //Make sure the page list is being refreshed after a save. getParent().setPageList(null); return "main"; } public boolean getHasLayout() { return getBase().getLayout() != null; } public String moveUp() { if (getBase().getSequence() != 0) { Collections.swap(getParent().getPresentation().getPages(), getBase().getSequence(), getBase().getSequence() - 1); getParent().reorderPages(); } return null; } public String moveDown() { if (getBase().getSequence() < getParent().getPresentation().getPages().size() - 1) { Collections.swap(getParent().getPresentation().getPages(), getBase().getSequence(), getBase().getSequence() + 1); getParent().reorderPages(); } return null; } public boolean isLast() { return getBase().getSequence() >= getParent().getPresentation().getPages().size() - 1; } public String getLastModified() { return lastModified; } public void setLastModified(String lastModified) { this.lastModified = lastModified; } public String getExpandedInformationSection() { if (this.getBase().getTitle() == null || this.getBase().getTitle().equals("")) { return "true"; } return "false"; } public boolean isNewPage() { return newPage; } public void setNewPage(boolean newPage) { this.newPage = newPage; } }