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/**
 * 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.cxf.helpers;

import java.lang.reflect.Method;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.StringTokenizer;

import javax.xml.namespace.QName;

import org.apache.cxf.annotations.SchemaValidation.SchemaValidationType;
import org.apache.cxf.endpoint.Endpoint;
import org.apache.cxf.message.Exchange;
import org.apache.cxf.message.Message;
import org.apache.cxf.message.MessageUtils;
import org.apache.cxf.service.model.AbstractPropertiesHolder;
import org.apache.cxf.service.model.BindingOperationInfo;
import org.apache.cxf.service.model.EndpointInfo;
import org.apache.cxf.service.model.OperationInfo;

public final class ServiceUtils {
    private ServiceUtils() {
    }
    
    /**
     * A short cut method to be able to test for if Schema Validation should be enabled
     * for IN or OUT without having to check BOTH and IN or OUT.
     * 
     * @param message
     * @param type
     */
    public static boolean isSchemaValidationEnabled(SchemaValidationType type, Message message) {
        SchemaValidationType validationType = getSchemaValidationType(message);

        boolean isRequestor = MessageUtils.isRequestor(message);
        if (SchemaValidationType.REQUEST.equals(validationType)) {
            if (isRequestor) {
                validationType = SchemaValidationType.OUT;
            } else {
                validationType = SchemaValidationType.IN;
            }
        } else if (SchemaValidationType.RESPONSE.equals(validationType)) {
            if (isRequestor) {
                validationType = SchemaValidationType.IN;
            } else {
                validationType = SchemaValidationType.OUT;
            }
        }
        
        return validationType.equals(type) 
            || ((SchemaValidationType.IN.equals(type) || SchemaValidationType.OUT.equals(type))
                && SchemaValidationType.BOTH.equals(validationType));
    }

    /**
     * A convenience method to check for schema validation config in the message context, and then in the service model.
     * Does not modify the Message context (other than what is done in the getContextualProperty itself)
     * 
     * @param message
     * @param type
     */
    public static SchemaValidationType getSchemaValidationType(Message message) {
        SchemaValidationType validationType = getOverrideSchemaValidationType(message);
        if (validationType == null) {
            validationType = getSchemaValidationTypeFromModel(message);
        } 
        
        if (validationType == null) {
            validationType = SchemaValidationType.NONE;
        }
     
        return validationType;
    }
    
    private static SchemaValidationType getOverrideSchemaValidationType(Message message) {
        Object obj = message.getContextualProperty(Message.SCHEMA_VALIDATION_ENABLED);
        if (obj != null) {
            // this method will transform the legacy enabled as well
            return getSchemaValidationType(obj);
        } else {
            return null;
        }
    }
    
    private static SchemaValidationType getSchemaValidationTypeFromModel(Message message) {
        Exchange exchange = message.getExchange();
        
        if (exchange != null) {
            BindingOperationInfo boi = exchange.getBindingOperationInfo();
            Endpoint endpoint = exchange.getEndpoint();
            
            if (boi != null && endpoint != null) {
                SchemaValidationType validationType = null;
                OperationInfo opInfo = boi.getOperationInfo();
                EndpointInfo ep = endpoint.getEndpointInfo();
                
                if (validationType == null && opInfo != null) {
                    validationType = getSchemaValidationTypeFromModel(message, opInfo);
                    
                    if (validationType == null && ep != null) {
                        validationType = getSchemaValidationTypeFromModel(message, ep);
                    }
                }
                
                return validationType;
            }
        }
        
        // else
        return null;
    }
    
    private static SchemaValidationType getSchemaValidationTypeFromModel(
            Message message, AbstractPropertiesHolder properties) {
        Object obj = properties.getProperty(Message.SCHEMA_VALIDATION_TYPE);
        if (obj != null) {
            return getSchemaValidationType(obj);
        } else {
            return null;
        }
    }
    
    public static SchemaValidationType getSchemaValidationType(Object obj) {
        if (obj instanceof SchemaValidationType) {
            return (SchemaValidationType)obj;
        } else if (obj != null) { 
            String value = obj.toString().toUpperCase(); // handle boolean values as well
            if ("TRUE".equals(value)) {
                return SchemaValidationType.BOTH;
            } else if ("FALSE".equals(value)) {
                return SchemaValidationType.NONE;
            } else if (value.length() > 0) {
                return SchemaValidationType.valueOf(value);
            }
        }
        
        // fall through default value
        return SchemaValidationType.NONE;
    }
    
    /**
     * Generates a suitable service name from a given class. The returned name
     * is the simple name of the class, i.e. without the package name.
     * 
     * @param clazz the class.
     * @return the name.
     */
    public static String makeServiceNameFromClassName(Class clazz) {
        String name = clazz.getName();
        int last = name.lastIndexOf(".");
        if (last != -1) {
            name = name.substring(last + 1);
        }

        int inner = name.lastIndexOf("$");
        if (inner != -1) {
            name = name.substring(inner + 1);
        }

        return name;
    }

    public static QName makeQualifiedNameFromClass(Class clazz) {
        String namespace = makeNamespaceFromClassName(clazz.getName(), "http");
        String localPart = makeServiceNameFromClassName(clazz);
        return new QName(namespace, localPart);
    }

    public static String getMethodName(Method m) {
        StringBuilder sb = new StringBuilder();
        sb.append(m.getDeclaringClass().getName());
        sb.append('.');
        sb.append(m.getName());
        sb.append('(');
        Class[] params = m.getParameterTypes();
        for (int i = 0; i < params.length; i++) {
            Class param = params[i];
            sb.append(param.getName());
            if (i < params.length - 1) {
                sb.append(", ");
            }
        }
        sb.append(')');
        return sb.toString();
    }

    /**
     * Generates the name of a XML namespace from a given class name and
     * protocol. The returned namespace will take the form
     * protocol://domain, where protocol is the
     * given protocol, and domain the inversed package name of
     * the given class name. 

For instance, if the given class name is * org.codehaus.xfire.services.Echo, and the protocol is * http, the resulting namespace would be * http://services.xfire.codehaus.org. * * @param className the class name * @param protocol the protocol (eg. http) * @return the namespace */ public static String makeNamespaceFromClassName(String className, String protocol) { int index = className.lastIndexOf("."); if (index == -1) { return protocol + "://" + "DefaultNamespace"; } String packageName = className.substring(0, index); StringTokenizer st = new StringTokenizer(packageName, "."); String[] words = new String[st.countTokens()]; for (int i = 0; i < words.length; ++i) { words[i] = st.nextToken(); } StringBuilder sb = new StringBuilder(80); for (int i = words.length - 1; i >= 0; --i) { String word = words[i]; // seperate with dot if (i != words.length - 1) { sb.append('.'); } sb.append(word); } return protocol + "://" + sb.toString() + "/"; } /** * Method makePackageName * * @param namespace */ public static String makePackageName(String namespace) { String hostname = null; String path = ""; // get the target namespace of the document try { URL u = new URL(namespace); hostname = u.getHost(); path = u.getPath(); } catch (MalformedURLException e) { if (namespace.indexOf(":") > -1) { hostname = namespace.substring(namespace.indexOf(":") + 1); if (hostname.indexOf("/") > -1) { hostname = hostname.substring(0, hostname.indexOf("/")); } } else { hostname = namespace; } } // if we didn't file a hostname, bail if (hostname == null) { return null; } // convert illegal java identifier hostname = hostname.replace('-', '_'); path = path.replace('-', '_'); // chomp off last forward slash in path, if necessary if ((path.length() > 0) && (path.charAt(path.length() - 1) == '/')) { path = path.substring(0, path.length() - 1); } // tokenize the hostname and reverse it StringTokenizer st = new StringTokenizer(hostname, ".:"); String[] words = new String[st.countTokens()]; for (int i = 0; i < words.length; ++i) { words[i] = st.nextToken(); } StringBuilder sb = new StringBuilder(namespace.length()); for (int i = words.length - 1; i >= 0; --i) { addWordToPackageBuffer(sb, words[i], i == words.length - 1); } // tokenize the path StringTokenizer st2 = new StringTokenizer(path, "/"); while (st2.hasMoreTokens()) { addWordToPackageBuffer(sb, st2.nextToken(), false); } return sb.toString(); } /** * Massage word into a form suitable for use in a Java package * name. Append it to the target string buffer with a . delimiter * iff word is not the first word in the package name. * * @param sb the buffer to append to * @param word the word to append * @param firstWord a flag indicating whether this is the first word */ private static void addWordToPackageBuffer(StringBuilder sb, String word, boolean firstWord) { if (JavaUtils.isJavaKeyword(word)) { word = JavaUtils.makeNonJavaKeyword(word); } // separate with dot after the first word if (!firstWord) { sb.append('.'); } // prefix digits with underscores if (Character.isDigit(word.charAt(0))) { sb.append('_'); } // replace periods with underscores if (word.indexOf('.') != -1) { char[] buf = word.toCharArray(); for (int i = 0; i < word.length(); i++) { if (buf[i] == '.') { buf[i] = '_'; } } word = new String(buf); } sb.append(word); } }





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