| /* |
| * 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.openejb; |
| |
| import java.util.Arrays; |
| import java.util.regex.Matcher; |
| import java.util.regex.Pattern; |
| import java.io.Serializable; |
| |
| /** |
| * @version $Revision$ $Date$ |
| */ |
| public class MethodSpec implements Comparable, Serializable { |
| private static final long serialVersionUID = -1623511701541770312L; |
| private static final int AFTER_OTHER = 1; |
| private static final int BEFORE_OTHER = -1; |
| private final String methodIntf; |
| private final String methodName; |
| private final String[] parameterTypes; |
| |
| public MethodSpec(String methodIntf, String methodName, String[] parameterTypes) { |
| this.methodIntf = methodIntf; |
| this.methodName = methodName; |
| this.parameterTypes = parameterTypes; |
| } |
| |
| public MethodSpec(String text) { |
| Pattern p = Pattern.compile("(\\S+) (\\S+)\\((\\S*)\\)"); |
| Matcher m = p.matcher(text); |
| if (!m.matches()) { |
| throw new IllegalArgumentException("Text must match (\\S+) (\\S+)\\((\\S*)\\) : " + text); |
| } |
| String intfString = m.group(1); |
| if (intfString.equals("all")) { |
| methodIntf = null; |
| } else { |
| methodIntf = intfString; |
| } |
| methodName = m.group(2); |
| String parameters = m.group(3); |
| if (parameters.length() > 0) { |
| parameterTypes = parameters.split(" *, *"); |
| } else { |
| parameterTypes = null; |
| } |
| } |
| |
| public String getMethodIntf() { |
| return methodIntf; |
| } |
| |
| public String getMethodName() { |
| return methodName; |
| } |
| |
| public String[] getParameterTypes() { |
| return parameterTypes; |
| } |
| |
| public int hashCode() { |
| int result = 17; |
| result = 37 * result + methodIntf.hashCode(); |
| result = 37 * result + methodName.hashCode(); |
| for (int i = 0; i < parameterTypes.length; i++) { |
| result = 37 * result + parameterTypes[i].hashCode(); |
| } |
| return result; |
| } |
| |
| public boolean equals(Object obj) { |
| if (obj == this) { |
| return true; |
| } |
| |
| if (!(obj instanceof MethodSpec)) { |
| return false; |
| } |
| |
| MethodSpec methodSpec = (MethodSpec) obj; |
| return methodIntf.equals(methodSpec.methodIntf) && |
| methodName.equals(methodSpec.methodName) && |
| Arrays.equals(parameterTypes, methodSpec.parameterTypes); |
| } |
| |
| public String toString() { |
| StringBuilder buffer = new StringBuilder(); |
| if (methodIntf != null) { |
| buffer.append(methodIntf); |
| } else { |
| buffer.append("all"); |
| } |
| buffer.append(" ").append(methodName).append('('); |
| if (parameterTypes != null) { |
| for (int i = 0; i < parameterTypes.length; i++) { |
| String parameterType = parameterTypes[i]; |
| if (i > 0) { |
| buffer.append(','); |
| } |
| buffer.append(parameterType); |
| } |
| } |
| buffer.append(')'); |
| return buffer.toString(); |
| } |
| |
| public boolean matches(String methodIntf, String methodName, String[] parameterTypes) { |
| assert methodIntf != null; |
| assert methodName != null; |
| assert parameterTypes != null; |
| if (this.methodIntf != null && !methodIntf.equals(this.methodIntf)) { |
| //definitely wrong interface |
| return false; |
| } |
| //our interface is not specified or matches. |
| if (this.methodName.equals("*")) { |
| return true; |
| } |
| if (!methodName.equals(this.methodName)) { |
| //explicitly different method names |
| return false; |
| } |
| //same method names. |
| if (this.parameterTypes == null) { |
| return true; |
| } |
| return Arrays.equals(parameterTypes, this.parameterTypes); |
| } |
| |
| public int compareTo(Object o) { |
| if (!(o instanceof MethodSpec)) { |
| return -1; |
| } |
| if (this == o) { |
| return 0; |
| } |
| MethodSpec other = (MethodSpec) o; |
| if (parameterTypes != null) { |
| if (other.parameterTypes == null) { |
| //parameter types always come before no param types |
| return BEFORE_OTHER; |
| } |
| //both have param types |
| if (methodIntf != null) { |
| if (other.methodIntf == null) { |
| //method intf comes before no method intf. |
| return BEFORE_OTHER; |
| } |
| //both have method interfaces |
| int intfOrder = methodIntf.compareTo(other.methodIntf); |
| if (intfOrder != 0) { |
| return intfOrder; |
| } |
| //same interfaces |
| return compareMethod(other); |
| } |
| if (other.methodIntf != null) { |
| //they have method intf, we don't, they are first |
| return AFTER_OTHER; |
| } |
| //neither has methodIntf: sort by method name |
| return compareMethod(other); |
| } |
| //we don't have param types |
| if (other.parameterTypes != null) { |
| //they do, they are first |
| return AFTER_OTHER; |
| } |
| //neither has param types. |
| //explicit method name comes first |
| if (!methodName.equals("*")) { |
| if (other.methodName.equals("*")) { |
| return BEFORE_OTHER; |
| } |
| //both explicit method names. |
| //explicit method interface comes first |
| if (methodIntf != null) { |
| if (other.methodIntf == null) { |
| return BEFORE_OTHER; |
| } |
| //both explicit method intf. sort by intf, then methodName |
| int intfOrder = methodIntf.compareTo(other.methodIntf); |
| if (intfOrder != 0) { |
| return intfOrder; |
| } |
| //same interfaces |
| return methodName.compareTo(other.methodName); |
| } |
| if (other.methodIntf != null) { |
| //they have explicit method inft, we dont, they are first |
| return AFTER_OTHER; |
| } |
| //neither have explicit method intf. |
| return methodName.compareTo(other.methodName); |
| } |
| //we don't have explicit method name |
| if (!other.methodName.equals("*")) { |
| //they do, they are first |
| return AFTER_OTHER; |
| } |
| //neither has explicit method name |
| if (methodIntf != null) { |
| if (other.methodIntf == null) { |
| return BEFORE_OTHER; |
| } |
| return methodIntf.compareTo(other.methodIntf); |
| } |
| if (other.methodIntf != null) { |
| return AFTER_OTHER; |
| } |
| //neither has methodIntf or explicit methodName. problem. |
| throw new IllegalStateException("Cannot compare " + this + " and " + other); |
| } |
| |
| private int compareMethod(MethodSpec other) { |
| int methodOrder = methodName.compareTo(other.methodName); |
| if (methodOrder != 0) { |
| return methodOrder; |
| } |
| //same method name, sort by params lexicographically |
| for (int i = 0; i < parameterTypes.length; i++) { |
| if (i == other.parameterTypes.length) { |
| //the other list is shorter, they are first |
| return AFTER_OTHER; |
| } |
| int paramOrder = parameterTypes[i].compareTo(other.parameterTypes[i]); |
| if (paramOrder != 0) { |
| return paramOrder; |
| } |
| } |
| //our list is shorter, we are first |
| return BEFORE_OTHER; |
| } |
| } |