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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 | |||||||||||||||||||
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Script.java | 0% | 0% | 0% | 0% |
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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.html;
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import java.util.HashMap;
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import java.util.Iterator;
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import java.util.Map;
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import org.apache.hivemind.ApplicationRuntimeException;
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import org.apache.hivemind.Resource;
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import org.apache.tapestry.AbstractComponent;
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import org.apache.tapestry.IBinding;
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import org.apache.tapestry.IEngine;
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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.IScript;
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import org.apache.tapestry.PageRenderSupport;
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import org.apache.tapestry.Tapestry;
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import org.apache.tapestry.TapestryUtils;
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import org.apache.tapestry.engine.IScriptSource;
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/**
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* Works with the {@link Body}component to add a script (and perhaps some initialization) to the
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* HTML response. [ <a href="../../../../../ComponentReference/Script.html">Component Reference
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* </a>]
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*
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* @author Howard Lewis Ship
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*/
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public abstract class Script extends AbstractComponent |
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{ |
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private Map _baseSymbols;
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/**
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* A Map of input and output symbols visible to the body of the Script.
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*
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* @since 2.2
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*/
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private Map _symbols;
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/**
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* Constructs the symbols {@link Map}. This starts with the contents of the symbols parameter
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* (if specified) to which is added any informal parameters. If both a symbols parameter and
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* informal parameters are bound, then a copy of the symbols parameter's value is made (that is,
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* the {@link Map}provided by the symbols parameter is read, but not modified).
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*/
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private Map getInputSymbols()
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{ |
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Map result = new HashMap();
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if (_baseSymbols != null) |
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result.putAll(_baseSymbols); |
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// Now, iterate through all the binding names (which includes both
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// formal and informal parmeters). Skip the formal ones and
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// access the informal ones.
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Iterator i = getBindingNames().iterator(); |
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while (i.hasNext())
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{ |
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String bindingName = (String) i.next(); |
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// Skip formal parameters
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if (getSpecification().getParameter(bindingName) != null) |
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continue;
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IBinding binding = getBinding(bindingName); |
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Object value = binding.getObject(); |
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result.put(bindingName, value); |
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} |
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return result;
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} |
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/**
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* Gets the {@link IScript}for the correct script.
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*/
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private IScript getParsedScript(IRequestCycle cycle)
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{ |
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String scriptPath = getScriptPath(); |
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if (scriptPath == null) |
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throw Tapestry.createRequiredParameterException(this, "scriptPath"); |
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IEngine engine = cycle.getEngine(); |
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IScriptSource source = engine.getScriptSource(); |
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// If the script path is relative, it should be relative to the Script component's
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// container (i.e., relative to a page in the application).
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Resource rootLocation = getContainer().getSpecification().getSpecificationLocation(); |
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Resource scriptLocation = rootLocation.getRelativeResource(scriptPath); |
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try
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{ |
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return source.getScript(scriptLocation);
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} |
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catch (RuntimeException ex)
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{ |
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throw new ApplicationRuntimeException(ex.getMessage(), this, null, ex); |
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} |
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} |
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protected void renderComponent(IMarkupWriter writer, IRequestCycle cycle) |
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{ |
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if (!cycle.isRewinding())
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{ |
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PageRenderSupport pageRenderSupport = TapestryUtils.getPageRenderSupport(cycle, this);
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_symbols = getInputSymbols(); |
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getParsedScript(cycle).execute(cycle, pageRenderSupport, _symbols); |
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} |
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// Render the body of the Script;
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renderBody(writer, cycle); |
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} |
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public abstract String getScriptPath();
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public Map getBaseSymbols()
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{ |
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return _baseSymbols;
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} |
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public void setBaseSymbols(Map baseSymbols) |
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{ |
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_baseSymbols = baseSymbols; |
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} |
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/**
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* Returns the complete set of symbols (input and output) from the script execution. This is
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* visible to the body of the Script, but is cleared after the Script finishes rendering.
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*
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* @since 2.2
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*/
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public Map getSymbols()
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{ |
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return _symbols;
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} |
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protected void cleanupAfterRender(IRequestCycle cycle) |
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{ |
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_symbols = null;
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super.cleanupAfterRender(cycle);
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} |
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} |
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