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30 day Evaluation Version distributed via the Maven Jar Repository. Clover is not free. You have 30 days to evaluate it. Please visit http://www.thecortex.net/clover to obtain a licensed version of Clover | |||||||||||||||||||
Source file | Conditionals | Statements | Methods | TOTAL | |||||||||||||||
DefaultLinkRenderer.java | 100% | 100% | 100% | 100% |
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// Copyright 2004, 2005 The Apache Software Foundation
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package org.apache.tapestry.link;
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import org.apache.hivemind.ApplicationRuntimeException;
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import org.apache.hivemind.HiveMind;
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import org.apache.tapestry.IMarkupWriter;
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import org.apache.tapestry.IRequestCycle;
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import org.apache.tapestry.Tapestry;
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import org.apache.tapestry.components.ILinkComponent;
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import org.apache.tapestry.engine.ILink;
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/**
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* Default implementation of {@link org.apache.tapestry.link.ILinkRenderer}, which does nothing
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* special. Can be used as a base class to provide additional handling.
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*
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* @author Howard Lewis Ship, David Solis
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* @since 3.0
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*/
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public class DefaultLinkRenderer implements ILinkRenderer |
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{ |
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/**
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* A shared instance used as a default for any link that doesn't explicitly override.
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*/
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public static final ILinkRenderer SHARED_INSTANCE = new DefaultLinkRenderer(); |
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public void renderLink(IMarkupWriter writer, IRequestCycle cycle, ILinkComponent linkComponent) |
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{ |
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IMarkupWriter wrappedWriter = null;
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if (cycle.getAttribute(Tapestry.LINK_COMPONENT_ATTRIBUTE_NAME) != null) |
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throw new ApplicationRuntimeException(Tapestry |
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.getMessage("AbstractLinkComponent.no-nesting"), linkComponent, null, null); |
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cycle.setAttribute(Tapestry.LINK_COMPONENT_ATTRIBUTE_NAME, linkComponent); |
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boolean hasBody = getHasBody();
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boolean disabled = linkComponent.isDisabled();
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if (!disabled)
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{ |
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ILink l = linkComponent.getLink(cycle); |
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if (hasBody)
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writer.begin(getElement()); |
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else
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writer.beginEmpty(getElement()); |
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writer.attribute(getUrlAttribute(), constructURL(l, linkComponent.getAnchor(), cycle)); |
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String target = linkComponent.getTarget(); |
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if (HiveMind.isNonBlank(target))
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writer.attribute(getTargetAttribute(), target); |
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beforeBodyRender(writer, cycle, linkComponent); |
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// Allow the wrapped components a chance to render.
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// Along the way, they may interact with this component
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// and cause the name variable to get set.
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wrappedWriter = writer.getNestedWriter(); |
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} |
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else
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wrappedWriter = writer; |
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if (hasBody)
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linkComponent.renderBody(wrappedWriter, cycle); |
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if (!disabled)
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{ |
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afterBodyRender(writer, cycle, linkComponent); |
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linkComponent.renderAdditionalAttributes(writer, cycle); |
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if (hasBody)
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{ |
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wrappedWriter.close(); |
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// Close the <element> tag
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writer.end(); |
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} |
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else
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writer.closeTag(); |
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} |
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cycle.removeAttribute(Tapestry.LINK_COMPONENT_ATTRIBUTE_NAME); |
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} |
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/**
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* Converts the EngineServiceLink into a URI or URL. This implementation simply invokes
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* {@link ILink#getURL(String, boolean)}.
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*/
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protected String constructURL(ILink link, String anchor, IRequestCycle cycle)
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{ |
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return link.getURL(anchor, true); |
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} |
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/**
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* Invoked after the href attribute has been written but before the body of the link is rendered
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* (but only if the link is not disabled).
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* <p>
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* This implementation does nothing.
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*/
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protected void beforeBodyRender(IMarkupWriter writer, IRequestCycle cycle, ILinkComponent link) |
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{ |
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} |
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/**
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* Invoked after the body of the link is rendered, but before
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* {@link ILinkComponent#renderAdditionalAttributes(IMarkupWriter, IRequestCycle)}is invoked
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* (but only if the link is not disabled).
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* <p>
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* This implementation does nothing.
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*/
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protected void afterBodyRender(IMarkupWriter writer, IRequestCycle cycle, ILinkComponent link) |
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{ |
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} |
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/** @since 3.0 * */
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protected String getElement()
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{ |
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return "a"; |
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} |
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protected String getUrlAttribute()
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{ |
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return "href"; |
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} |
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protected String getTargetAttribute()
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{ |
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return "target"; |
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} |
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protected boolean getHasBody() |
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{ |
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return true; |
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} |
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} |
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