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package org.apache.camel.util; |
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import java.beans.PropertyEditor; |
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import java.beans.PropertyEditorManager; |
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import java.lang.reflect.Field; |
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import java.lang.reflect.Method; |
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import java.lang.reflect.Modifier; |
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import java.net.URI; |
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import java.net.URISyntaxException; |
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import java.util.Arrays; |
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import java.util.HashMap; |
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import java.util.Iterator; |
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import java.util.LinkedHashMap; |
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import java.util.Map; |
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import java.util.Map.Entry; |
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import java.util.Set; |
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public class IntrospectionSupport { |
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private IntrospectionSupport() { |
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} |
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public static boolean getProperties(Object target, Map props, String optionPrefix) { |
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boolean rc = false; |
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if (target == null) { |
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throw new IllegalArgumentException("target was null."); |
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} |
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if (props == null) { |
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throw new IllegalArgumentException("props was null."); |
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} |
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if (optionPrefix == null) { |
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optionPrefix = ""; |
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} |
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Class clazz = target.getClass(); |
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Method[] methods = clazz.getMethods(); |
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for (int i = 0; i < methods.length; i++) { |
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Method method = methods[i]; |
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String name = method.getName(); |
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Class type = method.getReturnType(); |
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Class params[] = method.getParameterTypes(); |
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if (name.startsWith("get") && params.length == 0 && type != null && isSettableType(type)) { |
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try { |
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Object value = method.invoke(target, new Object[] {}); |
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if (value == null) { |
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continue; |
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} |
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String strValue = convertToString(value, type); |
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if (strValue == null) { |
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continue; |
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} |
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name = name.substring(3, 4).toLowerCase() + name.substring(4); |
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props.put(optionPrefix + name, strValue); |
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rc = true; |
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} catch (Throwable ignore) { |
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} |
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} |
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} |
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return rc; |
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} |
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public static boolean setProperties(Object target, Map props, String optionPrefix) { |
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boolean rc = false; |
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if (target == null) { |
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throw new IllegalArgumentException("target was null."); |
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} |
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if (props == null) { |
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throw new IllegalArgumentException("props was null."); |
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} |
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for (Iterator iter = props.keySet().iterator(); iter.hasNext();) { |
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String name = (String)iter.next(); |
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if (name.startsWith(optionPrefix)) { |
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Object value = props.get(name); |
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name = name.substring(optionPrefix.length()); |
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if (setProperty(target, name, value)) { |
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iter.remove(); |
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rc = true; |
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} |
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} |
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} |
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return rc; |
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} |
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public static Map extractProperties(Map props, String optionPrefix) { |
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if (props == null) { |
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throw new IllegalArgumentException("props was null."); |
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} |
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HashMap rc = new HashMap(props.size()); |
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for (Iterator iter = props.keySet().iterator(); iter.hasNext();) { |
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String name = (String)iter.next(); |
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if (name.startsWith(optionPrefix)) { |
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Object value = props.get(name); |
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name = name.substring(optionPrefix.length()); |
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rc.put(name, value); |
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iter.remove(); |
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} |
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} |
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return rc; |
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} |
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public static boolean setProperties(Object target, Map props) { |
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boolean rc = false; |
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if (target == null) { |
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throw new IllegalArgumentException("target was null."); |
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} |
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if (props == null) { |
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throw new IllegalArgumentException("props was null."); |
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} |
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for (Iterator iter = props.entrySet().iterator(); iter.hasNext();) { |
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Map.Entry entry = (Entry)iter.next(); |
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if (setProperty(target, (String)entry.getKey(), entry.getValue())) { |
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iter.remove(); |
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rc = true; |
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} |
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} |
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return rc; |
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} |
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public static boolean setProperty(Object target, String name, Object value) { |
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try { |
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Class clazz = target.getClass(); |
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Method setter = findSetterMethod(clazz, name); |
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if (setter == null) { |
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return false; |
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} |
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if (value == null || value.getClass() == setter.getParameterTypes()[0]) { |
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setter.invoke(target, new Object[] {value}); |
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} else { |
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setter.invoke(target, new Object[] {convert(value, setter.getParameterTypes()[0])}); |
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} |
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return true; |
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} catch (Throwable ignore) { |
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return false; |
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} |
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} |
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private static Object convert(Object value, Class type) throws URISyntaxException { |
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PropertyEditor editor = PropertyEditorManager.findEditor(type); |
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if (editor != null) { |
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editor.setAsText(value.toString()); |
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return editor.getValue(); |
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} |
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if (type == URI.class) { |
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return new URI(value.toString()); |
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} |
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return null; |
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} |
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private static String convertToString(Object value, Class type) throws URISyntaxException { |
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PropertyEditor editor = PropertyEditorManager.findEditor(type); |
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if (editor != null) { |
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editor.setValue(value); |
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return editor.getAsText(); |
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} |
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if (type == URI.class) { |
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return ((URI)value).toString(); |
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} |
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return null; |
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} |
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private static Method findSetterMethod(Class clazz, String name) { |
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name = "set" + name.substring(0, 1).toUpperCase() + name.substring(1); |
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Method[] methods = clazz.getMethods(); |
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for (int i = 0; i < methods.length; i++) { |
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Method method = methods[i]; |
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Class params[] = method.getParameterTypes(); |
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if (method.getName().equals(name) && params.length == 1 && isSettableType(params[0])) { |
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return method; |
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} |
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} |
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return null; |
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} |
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private static boolean isSettableType(Class clazz) { |
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if (PropertyEditorManager.findEditor(clazz) != null) { |
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return true; |
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} |
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if (clazz == URI.class) { |
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return true; |
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} |
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if (clazz == Boolean.class) { |
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return true; |
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} |
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return false; |
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} |
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public static String toString(Object target) { |
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return toString(target, Object.class); |
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} |
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public static String toString(Object target, Class stopClass) { |
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LinkedHashMap map = new LinkedHashMap(); |
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addFields(target, target.getClass(), stopClass, map); |
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StringBuffer buffer = new StringBuffer(simpleName(target.getClass())); |
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buffer.append(" {"); |
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Set entrySet = map.entrySet(); |
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boolean first = true; |
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for (Iterator iter = entrySet.iterator(); iter.hasNext();) { |
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Map.Entry entry = (Map.Entry)iter.next(); |
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if (first) { |
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first = false; |
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} else { |
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buffer.append(", "); |
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} |
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buffer.append(entry.getKey()); |
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buffer.append(" = "); |
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appendToString(buffer, entry.getValue()); |
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} |
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buffer.append("}"); |
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return buffer.toString(); |
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} |
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protected static void appendToString(StringBuffer buffer, Object value) { |
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buffer.append(value); |
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} |
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public static String simpleName(Class clazz) { |
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String name = clazz.getName(); |
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int p = name.lastIndexOf("."); |
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if (p >= 0) { |
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name = name.substring(p + 1); |
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} |
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return name; |
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} |
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private static void addFields(Object target, Class startClass, Class stopClass, LinkedHashMap map) { |
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if (startClass != stopClass) { |
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addFields(target, startClass.getSuperclass(), stopClass, map); |
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} |
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Field[] fields = startClass.getDeclaredFields(); |
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for (int i = 0; i < fields.length; i++) { |
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Field field = fields[i]; |
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if (Modifier.isStatic(field.getModifiers()) || Modifier.isTransient(field.getModifiers()) || Modifier.isPrivate(field.getModifiers())) { |
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continue; |
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} |
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try { |
285 |
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field.setAccessible(true); |
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Object o = field.get(target); |
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if (o != null && o.getClass().isArray()) { |
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try { |
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o = Arrays.asList((Object[])o); |
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} catch (Throwable e) { |
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} |
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} |
293 |
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map.put(field.getName(), o); |
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} catch (Throwable e) { |
295 |
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e.printStackTrace(); |
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} |
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} |
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299 |
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} |
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} |