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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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48
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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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70
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71
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73
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private Set _addedInterfaces = new HashSet();
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75
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76
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77
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78
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79
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private Map _incompleteMethods = new HashMap();
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81
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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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91
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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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597
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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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597
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Defense.notNull(classResolver, "classResolver");
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597
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Defense.notNull(specification, "specification");
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597
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Defense.notNull(baseClass, "baseClass");
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Defense.notNull(classFactory, "classFactory");
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107
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597
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_resolver = classResolver;
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597
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_specification = specification;
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597
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_baseClass = baseClass;
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111
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597
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introspectBaseClass();
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113
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597
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String name = newClassName();
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115
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597
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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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129
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597
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private void introspectBaseClass()
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{
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597
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try
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{
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133
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597
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synchronized (HiveMind.INTROSPECTOR_MUTEX)
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{
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135
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597
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BeanInfo bi = Introspector.getBeanInfo(_baseClass);
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137
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597
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PropertyDescriptor[] pds = bi.getPropertyDescriptors();
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139
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597
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for (int i = 0; i < pds.length; i++)
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{
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14283
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PropertyDescriptor pd = pds[i];
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143
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14283
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_properties.put(pd.getName(), pd);
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}
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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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156
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157
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158
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159
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160
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161
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1
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EnhancementOperationImpl()
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{
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}
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165
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2959
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public void claimProperty(String propertyName)
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{
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2959
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Defense.notNull(propertyName, "propertyName");
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2959
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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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2958
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_claimedProperties.add(propertyName);
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}
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175
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5115
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public void addField(String name, Class type)
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{
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5115
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_classFab.addField(name, type);
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}
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180
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2137
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public void addField(String name, Class type, Object value)
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{
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2137
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_classFab.addField(name, type);
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184
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2137
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int x = addConstructorParameter(type, value);
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186
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2137
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constructorBuilder().addln("{0} = ${1};", name, Integer.toString(x));
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}
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189
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130
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public Class convertTypeName(String type)
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{
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130
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Defense.notNull(type, "type");
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193
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Class result = _javaClassMapping.getType(type);
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if (result == null)
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{
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result = _resolver.findClass(type);
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_javaClassMapping.recordType(type, result);
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}
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return result;
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}
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public Class getPropertyType(String name)
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{
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Defense.notNull(name, "name");
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PropertyDescriptor pd = getPropertyDescriptor(name);
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return pd == null ? null : pd.getPropertyType();
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}
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214
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127
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public void validateProperty(String name, Class expectedType)
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{
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Defense.notNull(name, "name");
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127
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Defense.notNull(expectedType, "expectedType");
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219
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PropertyDescriptor pd = getPropertyDescriptor(name);
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if (pd == null)
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return;
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224
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80
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Class propertyType = pd.getPropertyType();
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226
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80
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if (propertyType.equals(expectedType))
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79
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return;
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229
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1
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throw new ApplicationRuntimeException(EnhanceMessages.propertyTypeMismatch(
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_baseClass,
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name,
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propertyType,
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expectedType));
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}
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236
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4034
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private PropertyDescriptor getPropertyDescriptor(String name)
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{
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4034
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return (PropertyDescriptor) _properties.get(name);
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}
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240
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241
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2168
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public String getAccessorMethodName(String propertyName)
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{
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243
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2168
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Defense.notNull(propertyName, "propertyName");
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245
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2168
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PropertyDescriptor pd = getPropertyDescriptor(propertyName);
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247
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2168
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if (pd != null && pd.getReadMethod() != null)
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2042
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return pd.getReadMethod().getName();
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250
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126
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return EnhanceUtils.createAccessorMethodName(propertyName);
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}
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253
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4573
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public void addMethod(int modifier, MethodSignature sig, String methodBody)
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{
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4573
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_classFab.addMethod(modifier, sig, methodBody);
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256
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}
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257
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258
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3
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public Class getBaseClass()
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259
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{
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260
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3
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return _baseClass;
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261
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}
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262
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263
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977
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public String getClassReference(Class clazz)
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264
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{
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265
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977
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Defense.notNull(clazz, "clazz");
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266
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267
|
977
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String result = (String) _classReferences.get(clazz);
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268
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269
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977
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if (result == null)
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270
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793
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result = addClassReference(clazz);
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271
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272
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977
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return result;
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273
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}
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274
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275
|
793
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private String addClassReference(Class clazz)
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276
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{
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277
|
793
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StringBuffer buffer = new StringBuffer("_class$");
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278
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279
|
793
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Class c = clazz;
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280
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281
|
793
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while (c.isArray())
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282
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{
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283
|
20
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buffer.append("array$");
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284
|
20
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c = c.getComponentType();
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285
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}
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286
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287
|
793
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buffer.append(c.getName().replace('.', '$'));
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288
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|
289
|
793
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String fieldName = buffer.toString();
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290
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291
|
793
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addField(fieldName, Class.class, clazz);
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292
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|
293
|
793
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_classReferences.put(clazz, fieldName);
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294
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|
295
|
793
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return fieldName;
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296
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}
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297
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|
298
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|
299
|
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|
300
|
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|
301
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|
302
|
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|
303
|
2137
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private int addConstructorParameter(Class type, Object value)
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304
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{
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305
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2137
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_constructorTypes.add(type);
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306
|
2137
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_constructorArguments.add(value);
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307
|
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|
308
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2137
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return _constructorArguments.size();
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309
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}
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310
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|
311
|
2137
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private BodyBuilder constructorBuilder()
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312
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{
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313
|
2137
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if (_constructorBuilder == null)
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314
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{
|
315
|
549
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_constructorBuilder = new BodyBuilder();
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316
|
549
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_constructorBuilder.begin();
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317
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}
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318
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|
319
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2137
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return _constructorBuilder;
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320
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}
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321
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322
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323
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324
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325
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326
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|
327
|
582
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public ComponentConstructor getConstructor()
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328
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{
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329
|
582
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finalizeEnhancedClass();
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330
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|
331
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582
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Constructor c = findConstructor();
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332
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|
333
|
582
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Object[] params = _constructorArguments.toArray();
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334
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|
335
|
582
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return new ComponentConstructorImpl(c, params, _specification.getLocation());
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336
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}
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337
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|
338
|
582
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private void finalizeEnhancedClass()
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339
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{
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340
|
582
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finalizeIncompleteMethods();
|
341
|
|
|
342
|
582
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if (_constructorBuilder != null)
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343
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{
|
344
|
548
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_constructorBuilder.end();
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345
|
|
|
346
|
548
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Class[] types = (Class[]) _constructorTypes
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347
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.toArray(new Class[_constructorTypes.size()]);
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348
|
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|
349
|
548
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_classFab.addConstructor(types, null, _constructorBuilder.toString());
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350
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}
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351
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}
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352
|
|
|
353
|
582
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private void finalizeIncompleteMethods()
|
354
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{
|
355
|
582
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Iterator i = _incompleteMethods.entrySet().iterator();
|
356
|
582
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while (i.hasNext())
|
357
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{
|
358
|
593
|
Map.Entry e = (Map.Entry) i.next();
|
359
|
593
|
MethodSignature sig = (MethodSignature) e.getKey();
|
360
|
593
|
BodyBuilder builder = (BodyBuilder) e.getValue();
|
361
|
|
|
362
|
|
|
363
|
|
|
364
|
|
|
365
|
593
|
builder.end();
|
366
|
|
|
367
|
593
|
_classFab.addMethod(Modifier.PUBLIC, sig, builder.toString());
|
368
|
|
}
|
369
|
|
}
|
370
|
|
|
371
|
582
|
private Constructor findConstructor()
|
372
|
|
{
|
373
|
582
|
Class componentClass = _classFab.createClass();
|
374
|
|
|
375
|
|
|
376
|
|
|
377
|
582
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return componentClass.getConstructors()[0];
|
378
|
|
}
|
379
|
|
|
380
|
|
static int _uid = 0;
|
381
|
|
|
382
|
597
|
private String newClassName()
|
383
|
|
{
|
384
|
597
|
String baseName = _baseClass.getName();
|
385
|
597
|
int dotx = baseName.lastIndexOf('.');
|
386
|
|
|
387
|
597
|
return "$" + baseName.substring(dotx + 1) + "_" + _uid++;
|
388
|
|
}
|
389
|
|
|
390
|
1955
|
public void extendMethodImplementation(Class interfaceClass, MethodSignature methodSignature,
|
391
|
|
String code)
|
392
|
|
{
|
393
|
1955
|
addInterfaceIfNeeded(interfaceClass);
|
394
|
|
|
395
|
1955
|
BodyBuilder builder = (BodyBuilder) _incompleteMethods.get(methodSignature);
|
396
|
|
|
397
|
1955
|
if (builder == null)
|
398
|
|
{
|
399
|
595
|
builder = createIncompleteMethod(methodSignature);
|
400
|
|
|
401
|
595
|
_incompleteMethods.put(methodSignature, builder);
|
402
|
|
}
|
403
|
|
|
404
|
1955
|
builder.addln(code);
|
405
|
|
}
|
406
|
|
|
407
|
1955
|
private void addInterfaceIfNeeded(Class interfaceClass)
|
408
|
|
{
|
409
|
1955
|
if (implementsInterface(interfaceClass))
|
410
|
1832
|
return;
|
411
|
|
|
412
|
123
|
_classFab.addInterface(interfaceClass);
|
413
|
123
|
_addedInterfaces.add(interfaceClass);
|
414
|
|
}
|
415
|
|
|
416
|
4614
|
public boolean implementsInterface(Class interfaceClass)
|
417
|
|
{
|
418
|
4614
|
if (interfaceClass.isAssignableFrom(_baseClass))
|
419
|
1665
|
return true;
|
420
|
|
|
421
|
2949
|
Iterator i = _addedInterfaces.iterator();
|
422
|
2949
|
while (i.hasNext())
|
423
|
|
{
|
424
|
371
|
Class addedInterface = (Class) i.next();
|
425
|
|
|
426
|
371
|
if (interfaceClass.isAssignableFrom(addedInterface))
|
427
|
210
|
return true;
|
428
|
|
}
|
429
|
|
|
430
|
2739
|
return false;
|
431
|
|
}
|
432
|
|
|
433
|
595
|
private BodyBuilder createIncompleteMethod(MethodSignature sig)
|
434
|
|
{
|
435
|
595
|
BodyBuilder result = new BodyBuilder();
|
436
|
|
|
437
|
|
|
438
|
|
|
439
|
595
|
result.begin();
|
440
|
|
|
441
|
595
|
if (existingImplementation(sig))
|
442
|
472
|
result.addln("super.{0}($$);", sig.getName());
|
443
|
|
|
444
|
595
|
return result;
|
445
|
|
}
|
446
|
|
|
447
|
|
|
448
|
|
|
449
|
|
|
450
|
|
|
451
|
|
|
452
|
595
|
private boolean existingImplementation(MethodSignature sig)
|
453
|
|
{
|
454
|
595
|
Method m = findMethod(sig);
|
455
|
|
|
456
|
595
|
return m != null && !Modifier.isAbstract(m.getModifiers());
|
457
|
|
}
|
458
|
|
|
459
|
|
|
460
|
|
|
461
|
|
|
462
|
595
|
private Method findMethod(MethodSignature sig)
|
463
|
|
{
|
464
|
|
|
465
|
|
|
466
|
595
|
try
|
467
|
|
{
|
468
|
595
|
return _baseClass.getMethod(sig.getName(), sig.getParameterTypes());
|
469
|
|
|
470
|
|
}
|
471
|
|
catch (NoSuchMethodException ex)
|
472
|
|
{
|
473
|
|
|
474
|
|
}
|
475
|
|
|
476
|
484
|
Class c = _baseClass;
|
477
|
|
|
478
|
484
|
while (c != Object.class)
|
479
|
|
{
|
480
|
1224
|
try
|
481
|
|
{
|
482
|
1224
|
return c.getDeclaredMethod(sig.getName(), sig.getParameterTypes());
|
483
|
|
}
|
484
|
|
catch (NoSuchMethodException ex)
|
485
|
|
{
|
486
|
|
|
487
|
|
}
|
488
|
|
|
489
|
863
|
c = c.getSuperclass();
|
490
|
|
}
|
491
|
|
|
492
|
123
|
return null;
|
493
|
|
}
|
494
|
|
|
495
|
565
|
public List findUnclaimedAbstractProperties()
|
496
|
|
{
|
497
|
565
|
List result = new ArrayList();
|
498
|
|
|
499
|
565
|
Iterator i = _properties.values().iterator();
|
500
|
|
|
501
|
565
|
while (i.hasNext())
|
502
|
|
{
|
503
|
13578
|
PropertyDescriptor pd = (PropertyDescriptor) i.next();
|
504
|
|
|
505
|
13578
|
String name = pd.getName();
|
506
|
|
|
507
|
13578
|
if (_claimedProperties.contains(name))
|
508
|
2660
|
continue;
|
509
|
|
|
510
|
10918
|
if (isAbstractProperty(pd))
|
511
|
211
|
result.add(name);
|
512
|
|
}
|
513
|
|
|
514
|
565
|
return result;
|
515
|
|
}
|
516
|
|
|
517
|
|
|
518
|
|
|
519
|
|
|
520
|
|
|
521
|
|
|
522
|
10918
|
private boolean isAbstractProperty(PropertyDescriptor pd)
|
523
|
|
{
|
524
|
10918
|
return isExistingAbstractMethod(pd.getReadMethod())
|
525
|
|
|| isExistingAbstractMethod(pd.getWriteMethod());
|
526
|
|
}
|
527
|
|
|
528
|
21627
|
private boolean isExistingAbstractMethod(Method m)
|
529
|
|
{
|
530
|
21627
|
return m != null && Modifier.isAbstract(m.getModifiers());
|
531
|
|
}
|
532
|
|
}
|