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package org.apache.tapestry.enhance;
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import java.beans.BeanInfo;
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import java.beans.IntrospectionException;
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import java.beans.Introspector;
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import java.beans.PropertyDescriptor;
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import java.lang.reflect.Constructor;
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import java.lang.reflect.Method;
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import java.lang.reflect.Modifier;
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import java.util.ArrayList;
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import java.util.HashMap;
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import java.util.HashSet;
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import java.util.IdentityHashMap;
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import java.util.Iterator;
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import java.util.List;
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import java.util.Map;
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import java.util.Set;
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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.HiveMind;
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import org.apache.hivemind.service.BodyBuilder;
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import org.apache.hivemind.service.ClassFab;
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import org.apache.hivemind.service.ClassFactory;
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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.hivemind.util.ToStringBuilder;
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import org.apache.tapestry.services.ComponentConstructor;
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import org.apache.tapestry.spec.IComponentSpecification;
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import org.apache.tapestry.util.IdAllocator;
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public class EnhancementOperationImpl implements EnhancementOperation
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{
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private ClassResolver _resolver;
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private IComponentSpecification _specification;
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private Class _baseClass;
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private ClassFab _classFab;
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private final Set _claimedProperties = new HashSet();
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private final JavaClassMapping _javaClassMapping = new JavaClassMapping();
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private final List _constructorTypes = new ArrayList();
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private final List _constructorArguments = new ArrayList();
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private final Map _finalFields = new IdentityHashMap();
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private Set _addedInterfaces = new HashSet();
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80
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private Map _incompleteMethods = new HashMap();
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private Map _properties = new HashMap();
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92
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93
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94
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95
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private BodyBuilder _constructorBuilder;
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private final IdAllocator _idAllocator = new IdAllocator();
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103
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561
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public EnhancementOperationImpl(ClassResolver classResolver,
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IComponentSpecification specification, Class baseClass, ClassFactory classFactory)
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{
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561
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Defense.notNull(classResolver, "classResolver");
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561
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Defense.notNull(specification, "specification");
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Defense.notNull(baseClass, "baseClass");
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Defense.notNull(classFactory, "classFactory");
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561
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_resolver = classResolver;
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561
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_specification = specification;
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561
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_baseClass = baseClass;
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561
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introspectBaseClass();
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561
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String name = newClassName();
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119
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561
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_classFab = classFactory.newClass(name, _baseClass);
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}
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0
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public String toString()
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{
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0
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ToStringBuilder builder = new ToStringBuilder(this);
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0
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builder.append("baseClass", _baseClass.getName());
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0
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builder.append("claimedProperties", _claimedProperties);
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0
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builder.append("classFab", _classFab);
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0
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return builder.toString();
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}
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561
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private void introspectBaseClass()
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{
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561
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try
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{
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561
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synchronized (HiveMind.INTROSPECTOR_MUTEX)
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{
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561
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addPropertiesDeclaredInBaseClass();
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}
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}
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catch (IntrospectionException ex)
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{
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0
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throw new ApplicationRuntimeException(EnhanceMessages.unabelToIntrospectClass(
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_baseClass,
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ex), ex);
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}
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}
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561
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private void addPropertiesDeclaredInBaseClass() throws IntrospectionException
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{
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561
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Class introspectClass = _baseClass;
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addPropertiesDeclaredInClass(introspectClass);
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561
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List interfaceQueue = new ArrayList();
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while (introspectClass != null)
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{
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2745
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addInterfacesToQueue(introspectClass, interfaceQueue);
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172
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2745
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introspectClass = introspectClass.getSuperclass();
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}
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561
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while (!interfaceQueue.isEmpty())
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{
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5846
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Class interfaceClass = (Class) interfaceQueue.remove(0);
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5846
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addPropertiesDeclaredInClass(interfaceClass);
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181
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5846
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addInterfacesToQueue(interfaceClass, interfaceQueue);
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}
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}
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185
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8591
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private void addInterfacesToQueue(Class introspectClass, List interfaceQueue)
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{
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187
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8591
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Class[] interfaces = introspectClass.getInterfaces();
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189
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8591
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for (int i = 0; i < interfaces.length; i++)
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5846
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interfaceQueue.add(interfaces[i]);
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}
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193
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6407
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private void addPropertiesDeclaredInClass(Class introspectClass) throws IntrospectionException
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{
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6407
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BeanInfo bi = Introspector.getBeanInfo(introspectClass);
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197
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6407
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PropertyDescriptor[] pds = bi.getPropertyDescriptors();
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199
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6407
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for (int i = 0; i < pds.length; i++)
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{
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34020
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PropertyDescriptor pd = pds[i];
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203
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34020
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String name = pd.getName();
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34020
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if (!_properties.containsKey(name))
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13752
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_properties.put(name, pd);
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}
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}
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210
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212
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213
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214
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215
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1
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EnhancementOperationImpl()
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{
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217
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}
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219
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3110
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public void claimProperty(String propertyName)
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{
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3110
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Defense.notNull(propertyName, "propertyName");
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223
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3110
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if (_claimedProperties.contains(propertyName))
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1
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throw new ApplicationRuntimeException(EnhanceMessages.claimedProperty(propertyName));
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225
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226
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3109
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_claimedProperties.add(propertyName);
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}
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229
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5014
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public void addField(String name, Class type)
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{
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5014
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_classFab.addField(name, type);
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}
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234
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2018
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public String addInjectedField(String fieldName, Object value)
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{
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2018
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Defense.notNull(fieldName, "fieldName");
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2018
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Defense.notNull(value, "value");
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239
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2018
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String existing = (String) _finalFields.get(value);
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240
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241
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242
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243
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2018
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if (existing != null)
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0
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return existing;
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245
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246
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247
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248
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249
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2018
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Class type = value.getClass();
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250
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251
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252
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253
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254
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2018
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String uniqueName = _idAllocator.allocateId(fieldName);
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255
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256
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257
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258
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259
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2018
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_classFab.addField(uniqueName, type);
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260
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261
|
2018
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int parameterIndex = addConstructorParameter(type, value);
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262
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|
263
|
2018
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constructorBuilder().addln("{0} = ${1};", uniqueName, Integer.toString(parameterIndex));
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264
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265
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266
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267
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2018
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_finalFields.put(value, uniqueName);
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268
|
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|
269
|
2018
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return uniqueName;
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270
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}
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271
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|
272
|
106
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public Class convertTypeName(String type)
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273
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{
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274
|
106
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Defense.notNull(type, "type");
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275
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|
276
|
106
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Class result = _javaClassMapping.getType(type);
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277
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|
278
|
106
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if (result == null)
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279
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{
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280
|
26
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result = _resolver.findClass(type);
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281
|
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|
282
|
25
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_javaClassMapping.recordType(type, result);
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283
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}
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284
|
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|
285
|
105
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return result;
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286
|
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}
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287
|
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|
288
|
2053
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public Class getPropertyType(String name)
|
289
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{
|
290
|
2053
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Defense.notNull(name, "name");
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291
|
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|
292
|
2053
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PropertyDescriptor pd = getPropertyDescriptor(name);
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293
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|
294
|
2053
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return pd == null ? null : pd.getPropertyType();
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295
|
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}
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296
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|
297
|
103
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public void validateProperty(String name, Class expectedType)
|
298
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{
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299
|
103
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Defense.notNull(name, "name");
|
300
|
103
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Defense.notNull(expectedType, "expectedType");
|
301
|
|
|
302
|
103
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PropertyDescriptor pd = getPropertyDescriptor(name);
|
303
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|
304
|
103
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if (pd == null)
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305
|
26
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return;
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306
|
|
|
307
|
77
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Class propertyType = pd.getPropertyType();
|
308
|
|
|
309
|
77
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if (propertyType.equals(expectedType))
|
310
|
76
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return;
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311
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|
|
312
|
1
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throw new ApplicationRuntimeException(EnhanceMessages.propertyTypeMismatch(
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313
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_baseClass,
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314
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name,
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315
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propertyType,
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316
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expectedType));
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317
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}
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318
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|
319
|
4408
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private PropertyDescriptor getPropertyDescriptor(String name)
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320
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{
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321
|
4408
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return (PropertyDescriptor) _properties.get(name);
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322
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}
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323
|
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|
324
|
2252
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public String getAccessorMethodName(String propertyName)
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325
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{
|
326
|
2252
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Defense.notNull(propertyName, "propertyName");
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327
|
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|
328
|
2252
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PropertyDescriptor pd = getPropertyDescriptor(propertyName);
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329
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330
|
2252
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if (pd != null && pd.getReadMethod() != null)
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331
|
2056
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return pd.getReadMethod().getName();
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332
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|
|
333
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196
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return EnhanceUtils.createAccessorMethodName(propertyName);
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334
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}
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335
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|
336
|
4873
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public void addMethod(int modifier, MethodSignature sig, String methodBody)
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337
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{
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338
|
4873
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_classFab.addMethod(modifier, sig, methodBody);
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339
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}
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340
|
|
|
341
|
1
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public Class getBaseClass()
|
342
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{
|
343
|
1
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return _baseClass;
|
344
|
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}
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345
|
|
|
346
|
831
|
public String getClassReference(Class clazz)
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347
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{
|
348
|
831
|
Defense.notNull(clazz, "clazz");
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349
|
|
|
350
|
831
|
String result = (String) _finalFields.get(clazz);
|
351
|
|
|
352
|
831
|
if (result == null)
|
353
|
676
|
result = addClassReference(clazz);
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354
|
|
|
355
|
831
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return result;
|
356
|
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}
|
357
|
|
|
358
|
676
|
private String addClassReference(Class clazz)
|
359
|
|
{
|
360
|
676
|
StringBuffer buffer = new StringBuffer("_class$");
|
361
|
|
|
362
|
676
|
Class c = clazz;
|
363
|
|
|
364
|
676
|
while (c.isArray())
|
365
|
|
{
|
366
|
16
|
buffer.append("array$");
|
367
|
16
|
c = c.getComponentType();
|
368
|
|
}
|
369
|
|
|
370
|
676
|
buffer.append(c.getName().replace('.', '$'));
|
371
|
|
|
372
|
676
|
String fieldName = buffer.toString();
|
373
|
|
|
374
|
676
|
return addInjectedField(fieldName, clazz);
|
375
|
|
}
|
376
|
|
|
377
|
|
|
378
|
|
|
379
|
|
|
380
|
|
|
381
|
|
|
382
|
2018
|
private int addConstructorParameter(Class type, Object value)
|
383
|
|
{
|
384
|
2018
|
_constructorTypes.add(type);
|
385
|
2018
|
_constructorArguments.add(value);
|
386
|
|
|
387
|
2018
|
return _constructorArguments.size();
|
388
|
|
}
|
389
|
|
|
390
|
2018
|
private BodyBuilder constructorBuilder()
|
391
|
|
{
|
392
|
2018
|
if (_constructorBuilder == null)
|
393
|
|
{
|
394
|
481
|
_constructorBuilder = new BodyBuilder();
|
395
|
481
|
_constructorBuilder.begin();
|
396
|
|
}
|
397
|
|
|
398
|
2018
|
return _constructorBuilder;
|
399
|
|
}
|
400
|
|
|
401
|
|
|
402
|
|
|
403
|
|
|
404
|
|
|
405
|
|
|
406
|
544
|
public ComponentConstructor getConstructor()
|
407
|
|
{
|
408
|
544
|
finalizeEnhancedClass();
|
409
|
|
|
410
|
544
|
Constructor c = findConstructor();
|
411
|
|
|
412
|
544
|
Object[] params = _constructorArguments.toArray();
|
413
|
|
|
414
|
544
|
return new ComponentConstructorImpl(c, params, _specification.getLocation());
|
415
|
|
}
|
416
|
|
|
417
|
545
|
void finalizeEnhancedClass()
|
418
|
|
{
|
419
|
545
|
finalizeIncompleteMethods();
|
420
|
|
|
421
|
545
|
if (_constructorBuilder != null)
|
422
|
|
{
|
423
|
480
|
_constructorBuilder.end();
|
424
|
|
|
425
|
480
|
Class[] types = (Class[]) _constructorTypes
|
426
|
|
.toArray(new Class[_constructorTypes.size()]);
|
427
|
|
|
428
|
480
|
_classFab.addConstructor(types, null, _constructorBuilder.toString());
|
429
|
|
}
|
430
|
|
}
|
431
|
|
|
432
|
545
|
private void finalizeIncompleteMethods()
|
433
|
|
{
|
434
|
545
|
Iterator i = _incompleteMethods.entrySet().iterator();
|
435
|
545
|
while (i.hasNext())
|
436
|
|
{
|
437
|
593
|
Map.Entry e = (Map.Entry) i.next();
|
438
|
593
|
MethodSignature sig = (MethodSignature) e.getKey();
|
439
|
593
|
BodyBuilder builder = (BodyBuilder) e.getValue();
|
440
|
|
|
441
|
|
|
442
|
|
|
443
|
|
|
444
|
593
|
builder.end();
|
445
|
|
|
446
|
593
|
_classFab.addMethod(Modifier.PUBLIC, sig, builder.toString());
|
447
|
|
}
|
448
|
|
}
|
449
|
|
|
450
|
544
|
private Constructor findConstructor()
|
451
|
|
{
|
452
|
544
|
Class componentClass = _classFab.createClass();
|
453
|
|
|
454
|
|
|
455
|
|
|
456
|
544
|
return componentClass.getConstructors()[0];
|
457
|
|
}
|
458
|
|
|
459
|
|
static int _uid = 0;
|
460
|
|
|
461
|
561
|
private String newClassName()
|
462
|
|
{
|
463
|
561
|
String baseName = _baseClass.getName();
|
464
|
561
|
int dotx = baseName.lastIndexOf('.');
|
465
|
|
|
466
|
561
|
return "$" + baseName.substring(dotx + 1) + "_" + _uid++;
|
467
|
|
}
|
468
|
|
|
469
|
2235
|
public void extendMethodImplementation(Class interfaceClass, MethodSignature methodSignature,
|
470
|
|
String code)
|
471
|
|
{
|
472
|
2235
|
addInterfaceIfNeeded(interfaceClass);
|
473
|
|
|
474
|
2235
|
BodyBuilder builder = (BodyBuilder) _incompleteMethods.get(methodSignature);
|
475
|
|
|
476
|
2235
|
if (builder == null)
|
477
|
|
{
|
478
|
595
|
builder = createIncompleteMethod(methodSignature);
|
479
|
|
|
480
|
595
|
_incompleteMethods.put(methodSignature, builder);
|
481
|
|
}
|
482
|
|
|
483
|
2235
|
builder.addln(code);
|
484
|
|
}
|
485
|
|
|
486
|
2235
|
private void addInterfaceIfNeeded(Class interfaceClass)
|
487
|
|
{
|
488
|
2235
|
if (implementsInterface(interfaceClass))
|
489
|
2104
|
return;
|
490
|
|
|
491
|
131
|
_classFab.addInterface(interfaceClass);
|
492
|
131
|
_addedInterfaces.add(interfaceClass);
|
493
|
|
}
|
494
|
|
|
495
|
4549
|
public boolean implementsInterface(Class interfaceClass)
|
496
|
|
{
|
497
|
4549
|
if (interfaceClass.isAssignableFrom(_baseClass))
|
498
|
1744
|
return true;
|
499
|
|
|
500
|
2805
|
Iterator i = _addedInterfaces.iterator();
|
501
|
2805
|
while (i.hasNext())
|
502
|
|
{
|
503
|
634
|
Class addedInterface = (Class) i.next();
|
504
|
|
|
505
|
634
|
if (interfaceClass.isAssignableFrom(addedInterface))
|
506
|
429
|
return true;
|
507
|
|
}
|
508
|
|
|
509
|
2376
|
return false;
|
510
|
|
}
|
511
|
|
|
512
|
595
|
private BodyBuilder createIncompleteMethod(MethodSignature sig)
|
513
|
|
{
|
514
|
595
|
BodyBuilder result = new BodyBuilder();
|
515
|
|
|
516
|
|
|
517
|
|
|
518
|
595
|
result.begin();
|
519
|
|
|
520
|
595
|
if (existingImplementation(sig))
|
521
|
449
|
result.addln("super.{0}($$);", sig.getName());
|
522
|
|
|
523
|
595
|
return result;
|
524
|
|
}
|
525
|
|
|
526
|
|
|
527
|
|
|
528
|
|
|
529
|
|
|
530
|
|
|
531
|
595
|
private boolean existingImplementation(MethodSignature sig)
|
532
|
|
{
|
533
|
595
|
Method m = findMethod(sig);
|
534
|
|
|
535
|
595
|
return m != null && !Modifier.isAbstract(m.getModifiers());
|
536
|
|
}
|
537
|
|
|
538
|
|
|
539
|
|
|
540
|
|
|
541
|
595
|
private Method findMethod(MethodSignature sig)
|
542
|
|
{
|
543
|
|
|
544
|
|
|
545
|
595
|
try
|
546
|
|
{
|
547
|
595
|
return _baseClass.getMethod(sig.getName(), sig.getParameterTypes());
|
548
|
|
|
549
|
|
}
|
550
|
|
catch (NoSuchMethodException ex)
|
551
|
|
{
|
552
|
|
|
553
|
|
}
|
554
|
|
|
555
|
446
|
Class c = _baseClass;
|
556
|
|
|
557
|
446
|
while (c != Object.class)
|
558
|
|
{
|
559
|
1188
|
try
|
560
|
|
{
|
561
|
1188
|
return c.getDeclaredMethod(sig.getName(), sig.getParameterTypes());
|
562
|
|
}
|
563
|
|
catch (NoSuchMethodException ex)
|
564
|
|
{
|
565
|
|
|
566
|
|
}
|
567
|
|
|
568
|
873
|
c = c.getSuperclass();
|
569
|
|
}
|
570
|
|
|
571
|
131
|
return null;
|
572
|
|
}
|
573
|
|
|
574
|
527
|
public List findUnclaimedAbstractProperties()
|
575
|
|
{
|
576
|
527
|
List result = new ArrayList();
|
577
|
|
|
578
|
527
|
Iterator i = _properties.values().iterator();
|
579
|
|
|
580
|
527
|
while (i.hasNext())
|
581
|
|
{
|
582
|
12987
|
PropertyDescriptor pd = (PropertyDescriptor) i.next();
|
583
|
|
|
584
|
12987
|
String name = pd.getName();
|
585
|
|
|
586
|
12987
|
if (_claimedProperties.contains(name))
|
587
|
2514
|
continue;
|
588
|
|
|
589
|
10473
|
if (isAbstractProperty(pd))
|
590
|
418
|
result.add(name);
|
591
|
|
}
|
592
|
|
|
593
|
527
|
return result;
|
594
|
|
}
|
595
|
|
|
596
|
|
|
597
|
|
|
598
|
|
|
599
|
|
|
600
|
|
|
601
|
10473
|
private boolean isAbstractProperty(PropertyDescriptor pd)
|
602
|
|
{
|
603
|
10473
|
return isExistingAbstractMethod(pd.getReadMethod())
|
604
|
|
|| isExistingAbstractMethod(pd.getWriteMethod());
|
605
|
|
}
|
606
|
|
|
607
|
20578
|
private boolean isExistingAbstractMethod(Method m)
|
608
|
|
{
|
609
|
20578
|
return m != null && Modifier.isAbstract(m.getModifiers());
|
610
|
|
}
|
611
|
|
}
|