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| package org.apache.tapestry.enhance; |
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| |
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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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| |
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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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| public class InjectMetaWorker implements InjectEnhancementWorker |
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| { |
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| static final String SOURCE_NAME = "_$componentPropertySource"; |
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| |
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| private ComponentPropertySource _source; |
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| |
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| private ValueConverter _valueConverter; |
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| |
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| private Map _primitiveParser = new HashMap(); |
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| |
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| { |
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| _primitiveParser.put(boolean.class, "java.lang.Boolean.parseBoolean");
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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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| |
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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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| op.claimReadonlyProperty(propertyName);
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| String sourceName = op
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| .addInjectedField(SOURCE_NAME, ComponentPropertySource.class, _source); |
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| MethodSignature sig = new MethodSignature(propertyType, op
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| .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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| } |
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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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| |
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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(
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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 {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 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(
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| "_$valueConverter", |
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| ValueConverter.class, |
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| _valueConverter); |
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| String classRef = op.getClassReference(propertyType);
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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 ({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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| } |