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package org.apache.tapestry.enhance; |
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import org.apache.hivemind.Location; |
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import org.apache.hivemind.service.BodyBuilder; |
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import org.apache.hivemind.service.ClassFabUtils; |
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import org.apache.hivemind.service.MethodSignature; |
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import org.apache.hivemind.util.Defense; |
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import org.apache.tapestry.coerce.ValueConverter; |
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import org.apache.tapestry.services.ComponentPropertySource; |
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import org.apache.tapestry.spec.InjectSpecification; |
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import java.lang.reflect.Modifier; |
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import java.util.HashMap; |
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import java.util.Map; |
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public class InjectMetaWorker implements InjectEnhancementWorker |
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{ |
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static final String SOURCE_NAME = "_$componentPropertySource"; |
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private ComponentPropertySource _source; |
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private ValueConverter _valueConverter; |
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private Map _primitiveParser = new HashMap(); |
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{ |
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_primitiveParser.put(short.class, "java.lang.Short.parseShort"); |
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_primitiveParser.put(int.class, "java.lang.Integer.parseInt"); |
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_primitiveParser.put(long.class, "java.lang.Long.parseLong"); |
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_primitiveParser.put(double.class, "java.lang.Double.parseDouble"); |
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_primitiveParser.put(float.class, "java.lang.Float.parseFloat"); |
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} |
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public void performEnhancement(EnhancementOperation op, InjectSpecification spec) |
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{ |
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String propertyName = spec.getProperty(); |
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String metaKey = spec.getObject(); |
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injectMetaValue(op, propertyName, metaKey, spec.getLocation()); |
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} |
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public void injectMetaValue(EnhancementOperation op, String propertyName, String metaKey, |
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Location location) |
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{ |
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Defense.notNull(op, "op"); |
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Defense.notNull(propertyName, "propertyName"); |
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Defense.notNull(metaKey, "metaKey"); |
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Class propertyType = op.getPropertyType(propertyName); |
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if (propertyType == null) { |
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propertyType = Object.class; |
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} |
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op.claimReadonlyProperty(propertyName); |
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String sourceName = op.addInjectedField(SOURCE_NAME, ComponentPropertySource.class, _source); |
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MethodSignature sig = new MethodSignature(propertyType, op.getAccessorMethodName(propertyName), null, null); |
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String parser = (String) _primitiveParser.get(propertyType); |
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if (parser != null) |
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{ |
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addPrimitive(op, metaKey, propertyName, sig, sourceName, parser, location); |
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return; |
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} else if (propertyType == boolean.class) |
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{ |
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addBoolean(op, metaKey, propertyName, sig, sourceName, location); |
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return; |
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} |
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if (propertyType == char.class) |
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{ |
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addCharacterPrimitive(op, metaKey, propertyName, sig, sourceName, location); |
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return; |
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} |
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addObject(op, metaKey, propertyName, propertyType, sig, sourceName, location); |
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} |
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private void addPrimitive(EnhancementOperation op, String metaKey, String propertyName, |
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MethodSignature sig, String sourceName, String parser, Location location) |
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{ |
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BodyBuilder builder = new BodyBuilder(); |
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builder.begin(); |
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builder.addln("java.lang.String meta = {0}.getComponentProperty(this, \"{1}\");", |
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sourceName, |
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metaKey); |
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builder.addln("return {0}(meta);", parser); |
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builder.end(); |
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op.addMethod(Modifier.PUBLIC, sig, builder.toString(), location); |
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} |
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private void addBoolean(EnhancementOperation op, String metaKey, String propertyName, |
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MethodSignature sig, String sourceName, Location location) |
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{ |
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BodyBuilder builder = new BodyBuilder(); |
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builder.begin(); |
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builder.addln( |
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"java.lang.String meta = {0}.getComponentProperty(this, \"{1}\");", |
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sourceName, |
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metaKey); |
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builder.addln("return java.lang.Boolean.valueOf(meta).booleanValue();"); |
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builder.end(); |
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op.addMethod(Modifier.PUBLIC, sig, builder.toString(), location); |
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} |
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private void addCharacterPrimitive(EnhancementOperation op, String metaKey, |
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String propertyName, MethodSignature sig, String sourceName, Location location) |
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{ |
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BodyBuilder builder = new BodyBuilder(); |
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builder.begin(); |
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builder.addln( |
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"java.lang.String meta = {0}.getComponentProperty(this, \"{1}\");", |
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sourceName, |
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metaKey); |
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builder.addln("return meta.charAt(0);"); |
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builder.end(); |
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op.addMethod(Modifier.PUBLIC, sig, builder.toString(), location); |
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} |
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private void addObject(EnhancementOperation op, String metaKey, String propertyName, |
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Class propertyType, MethodSignature sig, String sourceName, Location location) |
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{ |
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String valueConverterName = op.addInjectedField("_$valueConverter", ValueConverter.class, _valueConverter); |
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String classRef = op.getClassReference(propertyType); |
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BodyBuilder builder = new BodyBuilder(); |
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builder.begin(); |
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builder.addln("java.lang.String meta = {0}.getComponentProperty(this, \"{1}\");", |
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sourceName, |
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metaKey); |
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builder.addln("return ({0}) {1}.coerceValue(meta, {2});", ClassFabUtils |
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.getJavaClassName(propertyType), valueConverterName, classRef); |
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builder.end(); |
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op.addMethod(Modifier.PUBLIC, sig, builder.toString(), location); |
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} |
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public void setSource(ComponentPropertySource source) |
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{ |
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_source = source; |
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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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} |