/*
* Copyright 2004-2015 the Seasar Foundation and the Others.
*
* Licensed 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.seasar.framework.aop.interceptors;
import java.lang.reflect.Array;
import java.lang.reflect.Field;
import java.lang.reflect.Modifier;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import org.aopalliance.intercept.MethodInvocation;
import org.seasar.framework.log.Logger;
/**
* @author eriguchi
*
*/
public class ToStringInterceptor extends AbstractInterceptor {
private static final long serialVersionUID = 8867582188275644844L;
private static final String FIELD_SEPARATOR = ",";
private static final String VALUE_SEPARATOR = "=";
private static final String DOUBLE_QUOTE = "\"";
private static final String SINGLE_QUOTE = "\'";
private static final String FIELDS_BEGIN = "[";
private static final String FIELDS_END = "]";
private static final String ARRAY_BEGIN = "{";
private static final String ARRAY_END = "}";
private static final Logger logger = Logger
.getLogger(ToStringInterceptor.class);
/**
* includeConstantのBindingアノテーションです。
*/
public static final String includeConstant_BINDING = "bindingType=none";
private boolean includeConstant;
/**
* includeStaticのBindingアノテーションです。
*/
public static final String includeStatic_BINDING = "bindingType=none";
private boolean includeStatic;
private DateFormat dateFormat = new SimpleDateFormat();
/**
* 定数を出力するかどうかを設定します。
*
* @param includeConstant
*/
public void setIncludeConstant(boolean includeConstant) {
this.includeConstant = includeConstant;
}
/**
* staticなfieldを出力するかどうかを設定します。
*
* @param includeStatic
*/
public void setIncludeStatic(boolean includeStatic) {
this.includeStatic = includeStatic;
}
/**
* 日付のフォーマットを設定します。
*
* @param format
*/
public void setDateFormat(String format) {
dateFormat = new SimpleDateFormat(format);
}
public Object invoke(MethodInvocation invocation) throws Throwable {
Class targetClass = getTargetClass(invocation);
if (logger.isDebugEnabled()) {
String methodName = invocation.getMethod().getName();
logger.debug("[ToStringInterceptor] modifying "
+ targetClass.getName() + "#" + methodName);
}
try {
return toString(targetClass, invocation.getThis());
} catch (Exception e) {
logger.error("[ToStringInterceptor] modify failed", e);
return invocation.proceed();
}
}
private String toString(Class targetClass, Object target)
throws IllegalAccessException {
StringBuffer buf = new StringBuffer(100);
buf.append(targetClass.getName());
buf.append("@");
buf.append(Integer.toHexString(System.identityHashCode(target)));
buf.append(FIELDS_BEGIN);
boolean hasFields = false;
while (targetClass != null) {
Field[] fields = targetClass.getDeclaredFields();
for (int i = 0; i < fields.length; i++) {
Field field = fields[i];
field.setAccessible(true);
int modifiers = field.getModifiers();
if (Modifier.isStatic(modifiers) && Modifier.isFinal(modifiers)
&& !includeConstant) {
continue;
}
if (Modifier.isStatic(modifiers)
&& !Modifier.isFinal(modifiers) && !includeStatic) {
continue;
}
buf.append(field.getName());
buf.append(VALUE_SEPARATOR);
append(buf, field.get(target));
buf.append(FIELD_SEPARATOR);
hasFields = true;
}
targetClass = targetClass.getSuperclass();
}
if (hasFields) {
buf.setLength(buf.length() - FIELD_SEPARATOR.length());
}
buf.append(FIELDS_END);
return new String(buf);
}
private void append(StringBuffer buf, Object value) {
if (value == null) {
buf.append((String) null);
return;
}
if (value.getClass().isArray()) {
appendArray(buf, value);
return;
}
if (value instanceof String) {
buf.append(DOUBLE_QUOTE).append(value).append(DOUBLE_QUOTE);
return;
}
if (value instanceof Character) {
buf.append(SINGLE_QUOTE).append(value).append(SINGLE_QUOTE);
return;
}
if (value instanceof Date) {
buf.append(dateFormat.format((Date) value));
return;
}
buf.append(value);
}
private void appendArray(StringBuffer buf, Object array) {
buf.append(ARRAY_BEGIN);
int length = Array.getLength(array);
for (int i = 0; i < length; i++) {
append(buf, Array.get(array, i));
buf.append(FIELD_SEPARATOR);
}
if (length > 0) {
buf.setLength(buf.length() - FIELD_SEPARATOR.length());
}
buf.append(ARRAY_END);
}
}