diff options
Diffstat (limited to 'sca-java-1.x/tags/1.6-TUSCANY-3909/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/impl/PrintUtil.java')
| -rw-r--r-- | sca-java-1.x/tags/1.6-TUSCANY-3909/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/impl/PrintUtil.java | 273 |
1 files changed, 273 insertions, 0 deletions
diff --git a/sca-java-1.x/tags/1.6-TUSCANY-3909/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/impl/PrintUtil.java b/sca-java-1.x/tags/1.6-TUSCANY-3909/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/impl/PrintUtil.java new file mode 100644 index 0000000000..e85aec8cea --- /dev/null +++ b/sca-java-1.x/tags/1.6-TUSCANY-3909/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/impl/PrintUtil.java @@ -0,0 +1,273 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ +package org.apache.tuscany.sca.assembly.builder.impl; + +import java.beans.BeanInfo; +import java.beans.IntrospectionException; +import java.beans.Introspector; +import java.beans.PropertyDescriptor; +import java.io.OutputStream; +import java.io.OutputStreamWriter; +import java.io.PrintWriter; +import java.lang.reflect.Field; +import java.lang.reflect.Method; +import java.security.AccessController; +import java.security.PrivilegedAction; +import java.util.ArrayList; +import java.util.Arrays; +import java.util.HashSet; +import java.util.List; +import java.util.Set; + +import org.w3c.dom.Node; + +/** + * A simple print utility class to help print model instances. + * + * @version $Rev$ $Date$ + */ +class PrintUtil { + private boolean useGetters = false; + private PrintWriter out; + private int indent; + + public PrintUtil(PrintWriter out, boolean useGetters) { + this.out = out; + this.useGetters = useGetters; + } + + public PrintUtil(OutputStream out) { + this.out = new PrintWriter(new OutputStreamWriter(out), true); + } + + void indent() { + for (int i = 0; i < indent; i++) { + out.print(" "); + } + } + + /** + * Print an object. + * + * @param object + */ + public void print(Object object) { + Set<Integer> objects = new HashSet<Integer>(); + print(object, objects); + } + + /** + * Print an object. + * + * @param object + */ + private void print(Object object, Set<Integer> printed) { + if (object == null) { + return; + } + int id = System.identityHashCode(object); + if (printed.contains(id)) { + + // If we've already printed an object, print just it's HashCode + indent(); + out.println(object.getClass().getName() + "@" + id); + } else { + printed.add(id); + try { + + // Print the object class name + indent(); + out.println(object.getClass().getSimpleName() + " {"); + + // Get the object's properties + ValueAccessor accessor = useGetters ? new PropertyAccessor(object) : new FieldAccessor(object); + for (int i = 0; i < accessor.size(); i++) { + try { + + // Get the value of each property + Object value = accessor.getValue(i); + if (value != null) { + + // Convert array value into a list + if (value.getClass().isArray()) { + value = Arrays.asList((Object[])value); + } + + // Print elements in a list + if (value instanceof List) { + if (!((List)value).isEmpty()) { + indent++; + indent(); + out.println(accessor.getName(i) + "= ["); + + // Print each element, recursively + for (Object element : (List)value) { + indent++; + print(element, printed); + indent--; + } + indent(); + out.println(" ]"); + indent--; + } + } else { + Class<?> valueClass = value.getClass(); + + // Print a primitive, java built in type or + // enum, using toString() + if (valueClass.isPrimitive() || valueClass.getName().startsWith("java.") + || valueClass.getName().startsWith("javax.") + || valueClass.isEnum()) { + if (!accessor.getName(i).equals("class")) { + if (!(Boolean.FALSE.equals(value))) { + indent++; + indent(); + out.println(accessor.getName(i) + "=" + value.toString()); + indent--; + } + } + } else if (value instanceof Node) { + indent++; + indent(); + out.println(accessor.getName(i) + "=" + value.toString()); + indent--; + } else { + + // Print an object, recursively + indent++; + indent(); + out.println(accessor.getName(i) + "= {"); + indent++; + print(value, printed); + indent--; + indent(); + out.println("}"); + indent--; + } + } + } + } catch (Exception e) { + } + } + indent(); + out.println("}"); + } catch (Exception e) { + indent(); + out.println(e); + } + } + } + + public static interface ValueAccessor { + int size(); + + String getName(int i); + + Object getValue(int i) throws Exception; + } + + /** + * Java field reflection based value accessor + */ + private static class FieldAccessor implements ValueAccessor { + + private Object object; + private List<Field> fields; + + public FieldAccessor(Object object) { + this.fields = getAllFields(object.getClass()); + this.object = object; + } + + public String getName(int i) { + return fields.get(i).getName(); + } + + public Object getValue(int i) throws Exception { + return fields.get(i).get(object); + } + + public int size() { + return fields.size(); + } + + } + + /** + * JavaBean-based value accessor + */ + private static class PropertyAccessor implements ValueAccessor { + + private Object object; + private PropertyDescriptor[] fields; + + public PropertyAccessor(Object object) throws IntrospectionException { + BeanInfo beanInfo = Introspector.getBeanInfo(object.getClass()); + this.fields = beanInfo.getPropertyDescriptors(); + this.object = object; + } + + public String getName(int i) { + return fields[i].getName(); + } + + public Object getValue(int i) throws Exception { + Method getter = fields[i].getReadMethod(); + if (getter != null) { + return getter.invoke(object); + } + return null; + } + + public int size() { + return fields.length; + } + + } + + /** + * Returns a collection of fields declared by a class + * or one of its supertypes + */ + private static List<Field> getAllFields(Class<?> clazz) { + return getAllFields(clazz, new ArrayList<Field>()); + } + + /** + * Recursively evaluates the type hierarchy to return all fields + */ + private static List<Field> getAllFields(Class<?> clazz, List<Field> fields) { + if (clazz == null || clazz.isArray() || Object.class.equals(clazz)) { + return fields; + } + fields = getAllFields(clazz.getSuperclass(), fields); + Field[] declaredFields = clazz.getDeclaredFields(); + for (final Field field : declaredFields) { + AccessController.doPrivileged(new PrivilegedAction<Object>() { + public Object run() { + field.setAccessible(true); // ignore Java accessibility + return null; + } + }); + fields.add(field); + } + return fields; + } + +} |