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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.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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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 Set _claimedProperties = new HashSet();
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63
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private JavaClassMapping _javaClassMapping = new JavaClassMapping();
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private List _constructorTypes = new ArrayList();
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private List _constructorArguments = new ArrayList();
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71
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private Set _addedInterfaces = new HashSet();
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78
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private Map _incompleteMethods = new HashMap();
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82
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83
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84
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85
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private Map _classReferences = new HashMap();
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90
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private Map _properties = new HashMap();
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93
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94
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95
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96
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97
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private BodyBuilder _constructorBuilder;
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99
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540
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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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540
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Defense.notNull(classResolver, "classResolver");
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540
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Defense.notNull(specification, "specification");
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540
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Defense.notNull(baseClass, "baseClass");
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540
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Defense.notNull(classFactory, "classFactory");
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540
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_resolver = classResolver;
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_specification = specification;
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_baseClass = baseClass;
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111
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540
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introspectBaseClass();
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113
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540
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String name = newClassName();
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115
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540
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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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122
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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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128
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129
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131
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134
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135
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136
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137
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138
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540
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private void introspectBaseClass()
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139
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{
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140
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540
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try
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141
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{
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142
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540
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synchronized (HiveMind.INTROSPECTOR_MUTEX)
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{
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540
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addPropertiesDeclaredInBaseClass();
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145
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}
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}
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147
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catch (IntrospectionException ex)
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148
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{
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149
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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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154
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}
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156
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540
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private void addPropertiesDeclaredInBaseClass() throws IntrospectionException
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{
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540
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Class introspectClass = _baseClass;
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540
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addPropertiesDeclaredInClass(introspectClass);
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162
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540
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List interfaceQueue = new ArrayList();
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164
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540
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while (introspectClass != null)
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{
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2600
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addInterfacesToQueue(introspectClass, interfaceQueue);
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168
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2600
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introspectClass = introspectClass.getSuperclass();
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}
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171
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540
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while (!interfaceQueue.isEmpty())
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{
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5583
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Class interfaceClass = (Class) interfaceQueue.remove(0);
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175
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5583
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addPropertiesDeclaredInClass(interfaceClass);
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177
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5583
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addInterfacesToQueue(interfaceClass, interfaceQueue);
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}
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}
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181
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8183
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private void addInterfacesToQueue(Class introspectClass, List interfaceQueue)
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{
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183
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8183
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Class[] interfaces = introspectClass.getInterfaces();
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185
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8183
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for (int i = 0; i < interfaces.length; i++)
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5583
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interfaceQueue.add(interfaces[i]);
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}
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188
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189
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6123
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private void addPropertiesDeclaredInClass(Class introspectClass) throws IntrospectionException
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{
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191
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6123
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BeanInfo bi = Introspector.getBeanInfo(introspectClass);
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192
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193
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6123
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PropertyDescriptor[] pds = bi.getPropertyDescriptors();
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195
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6123
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for (int i = 0; i < pds.length; i++)
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{
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32319
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PropertyDescriptor pd = pds[i];
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199
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32319
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String name = pd.getName();
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201
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32319
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if (!_properties.containsKey(name))
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13009
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_properties.put(name, pd);
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}
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}
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206
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207
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208
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209
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210
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211
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1
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EnhancementOperationImpl()
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{
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213
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}
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214
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215
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2800
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public void claimProperty(String propertyName)
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{
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2800
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Defense.notNull(propertyName, "propertyName");
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219
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2800
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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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222
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2799
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_claimedProperties.add(propertyName);
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}
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224
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225
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4496
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public void addField(String name, Class type)
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{
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227
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4496
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_classFab.addField(name, type);
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}
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229
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230
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1990
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public void addField(String name, Class type, Object value)
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{
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232
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1990
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_classFab.addField(name, type);
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234
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1990
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int x = addConstructorParameter(type, value);
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235
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236
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1990
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constructorBuilder().addln("{0} = ${1};", name, Integer.toString(x));
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237
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}
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238
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239
|
109
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public Class convertTypeName(String type)
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{
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241
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109
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Defense.notNull(type, "type");
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242
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243
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109
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Class result = _javaClassMapping.getType(type);
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244
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245
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109
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if (result == null)
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{
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247
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26
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result = _resolver.findClass(type);
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248
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249
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25
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_javaClassMapping.recordType(type, result);
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250
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}
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251
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252
|
108
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return result;
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253
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}
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254
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255
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1736
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public Class getPropertyType(String name)
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256
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{
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257
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1736
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Defense.notNull(name, "name");
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258
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259
|
1736
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PropertyDescriptor pd = getPropertyDescriptor(name);
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260
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261
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1736
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return pd == null ? null : pd.getPropertyType();
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262
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}
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263
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|
264
|
106
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public void validateProperty(String name, Class expectedType)
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265
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{
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266
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106
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Defense.notNull(name, "name");
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267
|
106
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Defense.notNull(expectedType, "expectedType");
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268
|
|
|
269
|
106
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PropertyDescriptor pd = getPropertyDescriptor(name);
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270
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|
271
|
106
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if (pd == null)
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272
|
28
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return;
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273
|
|
|
274
|
78
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Class propertyType = pd.getPropertyType();
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275
|
|
|
276
|
78
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if (propertyType.equals(expectedType))
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277
|
77
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return;
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278
|
|
|
279
|
1
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throw new ApplicationRuntimeException(EnhanceMessages.propertyTypeMismatch(
|
280
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_baseClass,
|
281
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name,
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282
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propertyType,
|
283
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expectedType));
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284
|
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}
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285
|
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|
286
|
3814
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private PropertyDescriptor getPropertyDescriptor(String name)
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287
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{
|
288
|
3814
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return (PropertyDescriptor) _properties.get(name);
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289
|
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}
|
290
|
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|
291
|
1972
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public String getAccessorMethodName(String propertyName)
|
292
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{
|
293
|
1972
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Defense.notNull(propertyName, "propertyName");
|
294
|
|
|
295
|
1972
|
PropertyDescriptor pd = getPropertyDescriptor(propertyName);
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296
|
|
|
297
|
1972
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if (pd != null && pd.getReadMethod() != null)
|
298
|
1803
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return pd.getReadMethod().getName();
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299
|
|
|
300
|
169
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return EnhanceUtils.createAccessorMethodName(propertyName);
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301
|
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}
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302
|
|
|
303
|
4281
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public void addMethod(int modifier, MethodSignature sig, String methodBody)
|
304
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{
|
305
|
4281
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_classFab.addMethod(modifier, sig, methodBody);
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306
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}
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307
|
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|
308
|
3
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public Class getBaseClass()
|
309
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{
|
310
|
3
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return _baseClass;
|
311
|
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}
|
312
|
|
|
313
|
831
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public String getClassReference(Class clazz)
|
314
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{
|
315
|
831
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Defense.notNull(clazz, "clazz");
|
316
|
|
|
317
|
831
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String result = (String) _classReferences.get(clazz);
|
318
|
|
|
319
|
831
|
if (result == null)
|
320
|
676
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result = addClassReference(clazz);
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321
|
|
|
322
|
831
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return result;
|
323
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}
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324
|
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|
325
|
676
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private String addClassReference(Class clazz)
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326
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{
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327
|
676
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StringBuffer buffer = new StringBuffer("_class$");
|
328
|
|
|
329
|
676
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Class c = clazz;
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330
|
|
|
331
|
676
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while (c.isArray())
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332
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{
|
333
|
16
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buffer.append("array$");
|
334
|
16
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c = c.getComponentType();
|
335
|
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}
|
336
|
|
|
337
|
676
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buffer.append(c.getName().replace('.', '$'));
|
338
|
|
|
339
|
676
|
String fieldName = buffer.toString();
|
340
|
|
|
341
|
676
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addField(fieldName, Class.class, clazz);
|
342
|
|
|
343
|
676
|
_classReferences.put(clazz, fieldName);
|
344
|
|
|
345
|
676
|
return fieldName;
|
346
|
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}
|
347
|
|
|
348
|
|
|
349
|
|
|
350
|
|
|
351
|
|
|
352
|
|
|
353
|
1990
|
private int addConstructorParameter(Class type, Object value)
|
354
|
|
{
|
355
|
1990
|
_constructorTypes.add(type);
|
356
|
1990
|
_constructorArguments.add(value);
|
357
|
|
|
358
|
1990
|
return _constructorArguments.size();
|
359
|
|
}
|
360
|
|
|
361
|
1990
|
private BodyBuilder constructorBuilder()
|
362
|
|
{
|
363
|
1990
|
if (_constructorBuilder == null)
|
364
|
|
{
|
365
|
482
|
_constructorBuilder = new BodyBuilder();
|
366
|
482
|
_constructorBuilder.begin();
|
367
|
|
}
|
368
|
|
|
369
|
1990
|
return _constructorBuilder;
|
370
|
|
}
|
371
|
|
|
372
|
|
|
373
|
|
|
374
|
|
|
375
|
|
|
376
|
|
|
377
|
524
|
public ComponentConstructor getConstructor()
|
378
|
|
{
|
379
|
524
|
finalizeEnhancedClass();
|
380
|
|
|
381
|
524
|
Constructor c = findConstructor();
|
382
|
|
|
383
|
524
|
Object[] params = _constructorArguments.toArray();
|
384
|
|
|
385
|
524
|
return new ComponentConstructorImpl(c, params, _specification.getLocation());
|
386
|
|
}
|
387
|
|
|
388
|
524
|
private void finalizeEnhancedClass()
|
389
|
|
{
|
390
|
524
|
finalizeIncompleteMethods();
|
391
|
|
|
392
|
524
|
if (_constructorBuilder != null)
|
393
|
|
{
|
394
|
481
|
_constructorBuilder.end();
|
395
|
|
|
396
|
481
|
Class[] types = (Class[]) _constructorTypes
|
397
|
|
.toArray(new Class[_constructorTypes.size()]);
|
398
|
|
|
399
|
481
|
_classFab.addConstructor(types, null, _constructorBuilder.toString());
|
400
|
|
}
|
401
|
|
}
|
402
|
|
|
403
|
524
|
private void finalizeIncompleteMethods()
|
404
|
|
{
|
405
|
524
|
Iterator i = _incompleteMethods.entrySet().iterator();
|
406
|
524
|
while (i.hasNext())
|
407
|
|
{
|
408
|
549
|
Map.Entry e = (Map.Entry) i.next();
|
409
|
549
|
MethodSignature sig = (MethodSignature) e.getKey();
|
410
|
549
|
BodyBuilder builder = (BodyBuilder) e.getValue();
|
411
|
|
|
412
|
|
|
413
|
|
|
414
|
|
|
415
|
549
|
builder.end();
|
416
|
|
|
417
|
549
|
_classFab.addMethod(Modifier.PUBLIC, sig, builder.toString());
|
418
|
|
}
|
419
|
|
}
|
420
|
|
|
421
|
524
|
private Constructor findConstructor()
|
422
|
|
{
|
423
|
524
|
Class componentClass = _classFab.createClass();
|
424
|
|
|
425
|
|
|
426
|
|
|
427
|
524
|
return componentClass.getConstructors()[0];
|
428
|
|
}
|
429
|
|
|
430
|
|
static int _uid = 0;
|
431
|
|
|
432
|
540
|
private String newClassName()
|
433
|
|
{
|
434
|
540
|
String baseName = _baseClass.getName();
|
435
|
540
|
int dotx = baseName.lastIndexOf('.');
|
436
|
|
|
437
|
540
|
return "$" + baseName.substring(dotx + 1) + "_" + _uid++;
|
438
|
|
}
|
439
|
|
|
440
|
1762
|
public void extendMethodImplementation(Class interfaceClass, MethodSignature methodSignature,
|
441
|
|
String code)
|
442
|
|
{
|
443
|
1762
|
addInterfaceIfNeeded(interfaceClass);
|
444
|
|
|
445
|
1762
|
BodyBuilder builder = (BodyBuilder) _incompleteMethods.get(methodSignature);
|
446
|
|
|
447
|
1762
|
if (builder == null)
|
448
|
|
{
|
449
|
551
|
builder = createIncompleteMethod(methodSignature);
|
450
|
|
|
451
|
551
|
_incompleteMethods.put(methodSignature, builder);
|
452
|
|
}
|
453
|
|
|
454
|
1762
|
builder.addln(code);
|
455
|
|
}
|
456
|
|
|
457
|
1762
|
private void addInterfaceIfNeeded(Class interfaceClass)
|
458
|
|
{
|
459
|
1762
|
if (implementsInterface(interfaceClass))
|
460
|
1653
|
return;
|
461
|
|
|
462
|
109
|
_classFab.addInterface(interfaceClass);
|
463
|
109
|
_addedInterfaces.add(interfaceClass);
|
464
|
|
}
|
465
|
|
|
466
|
4086
|
public boolean implementsInterface(Class interfaceClass)
|
467
|
|
{
|
468
|
4086
|
if (interfaceClass.isAssignableFrom(_baseClass))
|
469
|
1509
|
return true;
|
470
|
|
|
471
|
2577
|
Iterator i = _addedInterfaces.iterator();
|
472
|
2577
|
while (i.hasNext())
|
473
|
|
{
|
474
|
423
|
Class addedInterface = (Class) i.next();
|
475
|
|
|
476
|
423
|
if (interfaceClass.isAssignableFrom(addedInterface))
|
477
|
214
|
return true;
|
478
|
|
}
|
479
|
|
|
480
|
2363
|
return false;
|
481
|
|
}
|
482
|
|
|
483
|
551
|
private BodyBuilder createIncompleteMethod(MethodSignature sig)
|
484
|
|
{
|
485
|
551
|
BodyBuilder result = new BodyBuilder();
|
486
|
|
|
487
|
|
|
488
|
|
|
489
|
551
|
result.begin();
|
490
|
|
|
491
|
551
|
if (existingImplementation(sig))
|
492
|
427
|
result.addln("super.{0}($$);", sig.getName());
|
493
|
|
|
494
|
551
|
return result;
|
495
|
|
}
|
496
|
|
|
497
|
|
|
498
|
|
|
499
|
|
|
500
|
|
|
501
|
|
|
502
|
551
|
private boolean existingImplementation(MethodSignature sig)
|
503
|
|
{
|
504
|
551
|
Method m = findMethod(sig);
|
505
|
|
|
506
|
551
|
return m != null && !Modifier.isAbstract(m.getModifiers());
|
507
|
|
}
|
508
|
|
|
509
|
|
|
510
|
|
|
511
|
|
|
512
|
551
|
private Method findMethod(MethodSignature sig)
|
513
|
|
{
|
514
|
|
|
515
|
|
|
516
|
551
|
try
|
517
|
|
{
|
518
|
551
|
return _baseClass.getMethod(sig.getName(), sig.getParameterTypes());
|
519
|
|
|
520
|
|
}
|
521
|
|
catch (NoSuchMethodException ex)
|
522
|
|
{
|
523
|
|
|
524
|
|
}
|
525
|
|
|
526
|
424
|
Class c = _baseClass;
|
527
|
|
|
528
|
424
|
while (c != Object.class)
|
529
|
|
{
|
530
|
1067
|
try
|
531
|
|
{
|
532
|
1067
|
return c.getDeclaredMethod(sig.getName(), sig.getParameterTypes());
|
533
|
|
}
|
534
|
|
catch (NoSuchMethodException ex)
|
535
|
|
{
|
536
|
|
|
537
|
|
}
|
538
|
|
|
539
|
752
|
c = c.getSuperclass();
|
540
|
|
}
|
541
|
|
|
542
|
109
|
return null;
|
543
|
|
}
|
544
|
|
|
545
|
507
|
public List findUnclaimedAbstractProperties()
|
546
|
|
{
|
547
|
507
|
List result = new ArrayList();
|
548
|
|
|
549
|
507
|
Iterator i = _properties.values().iterator();
|
550
|
|
|
551
|
507
|
while (i.hasNext())
|
552
|
|
{
|
553
|
12263
|
PropertyDescriptor pd = (PropertyDescriptor) i.next();
|
554
|
|
|
555
|
12263
|
String name = pd.getName();
|
556
|
|
|
557
|
12263
|
if (_claimedProperties.contains(name))
|
558
|
2439
|
continue;
|
559
|
|
|
560
|
9824
|
if (isAbstractProperty(pd))
|
561
|
177
|
result.add(name);
|
562
|
|
}
|
563
|
|
|
564
|
507
|
return result;
|
565
|
|
}
|
566
|
|
|
567
|
|
|
568
|
|
|
569
|
|
|
570
|
|
|
571
|
|
|
572
|
9824
|
private boolean isAbstractProperty(PropertyDescriptor pd)
|
573
|
|
{
|
574
|
9824
|
return isExistingAbstractMethod(pd.getReadMethod())
|
575
|
|
|| isExistingAbstractMethod(pd.getWriteMethod());
|
576
|
|
}
|
577
|
|
|
578
|
19490
|
private boolean isExistingAbstractMethod(Method m)
|
579
|
|
{
|
580
|
19490
|
return m != null && Modifier.isAbstract(m.getModifiers());
|
581
|
|
}
|
582
|
|
}
|