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package org.apache.tapestry.enhance; |
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import org.apache.hivemind.ErrorLog; |
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import org.apache.hivemind.Location; |
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import org.apache.hivemind.service.MethodSignature; |
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import org.apache.tapestry.IComponent; |
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import org.apache.tapestry.event.PageDetachListener; |
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import org.apache.tapestry.spec.IComponentSpecification; |
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import java.lang.reflect.Modifier; |
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import java.util.Iterator; |
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public class ClientIdPropertyWorker implements EnhancementWorker |
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{ |
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private static final String PROPERTY_NAME = "clientId"; |
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private ErrorLog _errorLog; |
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public void performEnhancement(EnhancementOperation op, IComponentSpecification spec) |
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{ |
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Location location = spec.getLocation(); |
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Iterator i = op.findUnclaimedAbstractProperties().iterator(); |
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while (i.hasNext()) |
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{ |
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String name = (String) i.next(); |
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if (name.equals(PROPERTY_NAME)) { |
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try |
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{ |
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createProperty(op, name, location); |
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} |
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catch (Exception ex) |
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{ |
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_errorLog.error( |
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EnhanceMessages.errorAddingProperty(name, op.getBaseClass(), ex), |
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location, |
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ex); |
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} |
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break; |
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} |
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} |
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} |
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private void createProperty(EnhancementOperation op, String name, Location location) |
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{ |
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Class propertyType = op.getPropertyType(name); |
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String fieldName = "_$" + name; |
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String defaultFieldName = fieldName + "$defaultValue"; |
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op.addField(fieldName, propertyType); |
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op.addField(defaultFieldName, propertyType); |
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String methodName = op.getAccessorMethodName(name); |
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StringBuffer str = new StringBuffer(); |
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str.append(" if(").append(fieldName).append(" == null){") |
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.append(" if (getPage() == null) { return null; }") |
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.append(" String tempId = getSpecifiedId();") |
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.append(" if (tempId == null) { return null; }") |
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.append(" return getPage().getRequestCycle().peekUniqueId(org.apache.tapestry.TapestryUtils#convertTapestryIdToNMToken(tempId));") |
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.append("} else { "); |
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str.append("return ").append(fieldName).append(";"); |
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str.append("}"); |
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op.addMethod( |
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Modifier.PUBLIC, |
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new MethodSignature(propertyType, methodName, null, null), |
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str.toString(), |
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location); |
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EnhanceUtils.createSimpleMutator(op, fieldName, name, propertyType, location); |
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op.extendMethodImplementation( |
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IComponent.class, |
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EnhanceUtils.FINISH_LOAD_SIGNATURE, |
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defaultFieldName + " = " + fieldName + ";"); |
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op.extendMethodImplementation( |
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PageDetachListener.class, |
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EnhanceUtils.PAGE_DETACHED_SIGNATURE, |
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fieldName + " = " + defaultFieldName + ";"); |
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op.claimProperty(name); |
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} |
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public void setErrorLog(ErrorLog errorLog) |
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{ |
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_errorLog = errorLog; |
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} |
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} |