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The free Java library for Asterisk PBX integration.
/*
* Copyright 2004-2006 Stefan Reuter and 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.asteriskjava.manager.internal;
import org.asteriskjava.AsteriskVersion;
import org.asteriskjava.manager.AsteriskMapping;
import org.asteriskjava.manager.action.ManagerAction;
import org.asteriskjava.manager.action.UserEventAction;
import org.asteriskjava.manager.event.UserEvent;
import org.asteriskjava.util.Log;
import org.asteriskjava.util.LogFactory;
import org.asteriskjava.util.ReflectionUtil;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.util.*;
/**
* Default implementation of the ActionBuilder interface.
*
* @author srt
* @version $Id$
*/
class ActionBuilderImpl implements ActionBuilder {
private static final String LINE_SEPARATOR = "\r\n";
private static final String ATTRIBUTES_PROPERTY_NAME = "attributes";
/**
* Instance logger.
*/
private final Log logger = LogFactory.getLog(getClass());
private AsteriskVersion targetVersion;
private final Set membersToIgnore = new HashSet<>();
/**
* Creates a new ActionBuilder for Asterisk 1.0.
*/
ActionBuilderImpl() {
this.targetVersion = AsteriskVersion.ASTERISK_1_0;
/*
* When using the Reflection API to get all of the getters for building
* actions to send, we ignore some of the getters
*/
this.membersToIgnore.add("class");
this.membersToIgnore.add("action");
this.membersToIgnore.add("actionid");
this.membersToIgnore.add(ATTRIBUTES_PROPERTY_NAME);
}
public void setTargetVersion(AsteriskVersion targetVersion) {
this.targetVersion = targetVersion;
}
public String buildAction(final ManagerAction action) {
return buildAction(action, null);
}
@SuppressWarnings("unchecked")
public String buildAction(final ManagerAction action, final String internalActionId) {
StringBuilder sb = new StringBuilder();
sb.append("action: ");
sb.append(action.getAction());
sb.append(LINE_SEPARATOR);
if (internalActionId != null) {
sb.append("actionid: ");
sb.append(ManagerUtil.addInternalActionId(action.getActionId(), internalActionId));
sb.append(LINE_SEPARATOR);
} else if (action.getActionId() != null) {
sb.append("actionid: ");
sb.append(action.getActionId());
sb.append(LINE_SEPARATOR);
}
Map getters;
// if this is a user event action, we need to grab the internal event,
// otherwise do below as normal
if (action instanceof UserEventAction) {
UserEvent userEvent = ((UserEventAction) action).getUserEvent();
appendUserEvent(sb, userEvent);
getters = ReflectionUtil.getGetters(userEvent.getClass());
// eventually we may want to add more Map keys for events to ignore
// when appending
appendGetters(sb, userEvent, getters);
} else {
getters = ReflectionUtil.getGetters(action.getClass());
appendGetters(sb, action, getters);
}
// actions that have the special getAttributes method will
// have their Map appended without a singular key or separator
if (getters.containsKey(ATTRIBUTES_PROPERTY_NAME)) {
Method getter = getters.get(ATTRIBUTES_PROPERTY_NAME);
Object value = null;
try {
value = getter.invoke(action);
} catch (Exception ex) {
logger.error("Unable to retrieve property '" + ATTRIBUTES_PROPERTY_NAME + "' of " + action.getClass(), ex);
}
if (value instanceof Map) {
Map attributes = (Map) value;
for (Map.Entry entry : attributes.entrySet()) {
appendString(sb, entry.getKey() == null ? "null" : entry.getKey().toString(),
entry.getValue() == null ? "null" : entry.getValue().toString());
}
}
}
sb.append(LINE_SEPARATOR);
return sb.toString();
}
private void appendMap(StringBuilder sb, String key, Map values) {
String singularKey;
// strip plural s (i.e. use "variable: " instead of "variables: "
if (key.endsWith("s")) {
singularKey = key.substring(0, key.length() - 1);
} else {
singularKey = key;
}
if (targetVersion.isAtLeast(AsteriskVersion.ASTERISK_1_2)) {
appendMap12(sb, singularKey, values);
} else {
appendMap10(sb, singularKey, values);
}
}
private void appendMap10(StringBuilder sb, String singularKey, Map values) {
Iterator> entryIterator;
sb.append(singularKey);
sb.append(": ");
entryIterator = values.entrySet().iterator();
while (entryIterator.hasNext()) {
Map.Entry entry;
entry = entryIterator.next();
sb.append(entry.getKey());
sb.append("=");
if (entry.getValue() != null) {
sb.append(entry.getValue());
}
if (entryIterator.hasNext()) {
sb.append("|");
}
}
sb.append(LINE_SEPARATOR);
}
private void appendMap12(StringBuilder sb, String singularKey, Map values) {
for (Map.Entry entry : values.entrySet()) {
sb.append(singularKey);
sb.append(": ");
sb.append(entry.getKey());
sb.append("=");
if (entry.getValue() != null) {
if (entry.getKey().equalsIgnoreCase("Content")) {
String sp[] = entry.getValue().split("\n");
if (sp.length > 0) {
sb.append(sp[0]);
for (int i = 1; i < sp.length; i++) {
sb.append(LINE_SEPARATOR);
sb.append(singularKey);
sb.append(": ");
sb.append(entry.getKey());
sb.append("=");
sb.append(sp[i]);
}
}
} else {
sb.append(entry.getValue());
}
}
sb.append(LINE_SEPARATOR);
}
}
private void appendString(StringBuilder sb, String key, String value) {
sb.append(key);
sb.append(": ");
sb.append(value);
sb.append(LINE_SEPARATOR);
}
private void appendUserEvent(StringBuilder sb, UserEvent event) {
Class clazz = event.getClass();
String className = clazz.getName();
String eventType = className.substring(className.lastIndexOf('.') + 1).toLowerCase(Locale.ENGLISH);
if (eventType.endsWith("event")) {
eventType = eventType.substring(0, eventType.length() - "event".length());
}
appendString(sb, "UserEvent", eventType);
}
@SuppressWarnings("unchecked")
private void appendGetters(StringBuilder sb, Object action, Map getters) {
for (Map.Entry entry : getters.entrySet()) {
final String name = entry.getKey();
final Method getter = entry.getValue();
final Object value;
if (membersToIgnore.contains(name)) {
continue;
}
try {
value = getter.invoke(action);
} catch (Exception ex) {
logger.error("Unable to retrieve property '" + name + "' of " + action.getClass(), ex);
continue;
}
if (value == null || value instanceof Class) {
continue;
}
final String mappedName = mapToAsterisk(getter);
if (value instanceof Map) {
appendMap(sb, mappedName, (Map) value);
} else if (value instanceof String) {
appendString(sb, mappedName, (String) value);
} else {
appendString(sb, mappedName, value.toString());
}
}
}
private static String mapToAsterisk(Method getter) {
AsteriskMapping annotation;
// check annotation of getter method
annotation
= getter.getAnnotation(AsteriskMapping.class
);
if (annotation != null) {
return annotation.value();
}
// check annotation of setter method
String setterName = determineSetterName(getter.getName());
try {
Method setter = getter.getDeclaringClass().getDeclaredMethod(setterName, getter.getReturnType());
annotation
= setter.getAnnotation(AsteriskMapping.class
);
if (annotation != null) {
return annotation.value();
}
} catch (NoSuchMethodException e) {
// ok, no setter method
}
// check annotation of field
String fieldName = determineFieldName(getter.getName());
try {
Field field = getter.getDeclaringClass().getDeclaredField(fieldName);
annotation
= field.getAnnotation(AsteriskMapping.class
);
if (annotation != null) {
return annotation.value();
}
} catch (NoSuchFieldException e) {
// ok, no field
}
return fieldName.toLowerCase(Locale.US);
}
static String determineSetterName(String getterName) {
if (getterName.startsWith("get")) {
return "set" + getterName.substring(3);
} else if (getterName.startsWith("is")) {
return "set" + getterName.substring(2);
} else {
throw new IllegalArgumentException("Getter '" + getterName + "' doesn't start with either 'get' or 'is'");
}
}
static String determineFieldName(String accessorName) {
if (accessorName.startsWith("get")) {
return lcFirst(accessorName.substring(3));
} else if (accessorName.startsWith("is")) {
return lcFirst(accessorName.substring(2));
} else if (accessorName.startsWith("set")) {
return lcFirst(accessorName.substring(3));
} else {
throw new IllegalArgumentException("Accessor '" + accessorName + "' doesn't start with either 'get', 'is' or 'set'");
}
}
/**
* Converts the first character to lower case.
*
* @param s the string to convert.
* @return the converted string.
*/
private static String lcFirst(String s) {
if (s == null || s.isEmpty()) {
return s;
}
return Character.toLowerCase(s.charAt(0))
+ (s.length() == 1 ? "" : s.substring(1));
}
}