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| package org.apache.tapestry.engine; |
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| import java.util.HashMap; |
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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.ClassResolver; |
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| import org.apache.hivemind.Resource; |
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| import org.apache.tapestry.IScript; |
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| import org.apache.tapestry.Tapestry; |
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| import org.apache.tapestry.coerce.ValueConverter; |
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| import org.apache.tapestry.event.ResetEventListener; |
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| import org.apache.tapestry.script.ScriptParser; |
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| import org.apache.tapestry.services.ExpressionEvaluator; |
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| import org.apache.tapestry.util.xml.DocumentParseException; |
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| public class DefaultScriptSource implements IScriptSource, ResetEventListener |
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| { |
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| private ClassResolver _classResolver; |
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| private ExpressionEvaluator _expressionEvaluator; |
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| private ValueConverter _valueConverter; |
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| private Map _cache = new HashMap(); |
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| public synchronized void resetEventDidOccur()
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| { |
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| _cache.clear();
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| } |
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| public synchronized IScript getScript(Resource resource)
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| { |
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| IScript result = (IScript) _cache.get(resource);
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| if (result != null)
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| return result;
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| result = parse(resource);
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| _cache.put(resource, result);
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| return result;
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| } |
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| private IScript parse(Resource resource)
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| { |
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| ScriptParser parser = new ScriptParser(_classResolver, _expressionEvaluator,
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| _valueConverter); |
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| try
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| { |
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| return parser.parse(resource);
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| } |
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| catch (DocumentParseException ex) |
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| { |
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| throw new ApplicationRuntimeException(Tapestry.format(
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| "DefaultScriptSource.unable-to-parse-script", |
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| resource), ex); |
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| } |
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| } |
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| public void setClassResolver(ClassResolver classResolver)
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| { |
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| _classResolver = classResolver;
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| } |
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| public void setExpressionEvaluator(ExpressionEvaluator expressionEvaluator)
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| { |
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| _expressionEvaluator = expressionEvaluator;
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| } |
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| public void setValueConverter(ValueConverter valueConverter)
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| { |
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| _valueConverter = valueConverter;
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| } |
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| } |