| /* 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.pluto.container; |
| |
| /** |
| * Contains identification data for a page resource. |
| * |
| * @author Scott Nicklous |
| * |
| */ |
| public class PageResourceId implements Comparable<PageResourceId> { |
| |
| private final String name; |
| private final String scope; |
| private final String version; |
| |
| public PageResourceId(String name, String scope, String version) { |
| this.name = name; |
| this.scope = scope; |
| this.version = version; |
| } |
| |
| public PageResourceId(PageResourceId other) { |
| this.name = other.name; |
| this.scope = other.scope; |
| this.version = other.version; |
| } |
| |
| /** |
| * @return the name |
| */ |
| public String getName() { |
| return name; |
| } |
| |
| /** |
| * @return the scope |
| */ |
| public String getScope() { |
| return scope; |
| } |
| |
| /** |
| * @return the version |
| */ |
| public String getVersion() { |
| return version; |
| } |
| |
| public boolean resourceMatches(PageResourceId other) { |
| if (this == other) { |
| return true; |
| } |
| if (other == null) { |
| return false; |
| } |
| if (scope == null) { |
| if (other.scope != null) { |
| return false; |
| } |
| } else if (!scope.equals(other.scope)) { |
| return false; |
| } |
| if (name == null) { |
| if (other.name != null) { |
| return false; |
| } |
| } else if (!name.equals(other.name)) { |
| return false; |
| } |
| |
| return true; |
| } |
| |
| @Override |
| public String toString() { |
| StringBuilder txt = new StringBuilder(128); |
| txt.append("Page resource ID. Name: ").append(name); |
| txt.append(", Scope: ").append(scope); |
| txt.append(", Version: ").append(version); |
| return txt.toString(); |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see java.lang.Object#hashCode() |
| */ |
| @Override |
| public int hashCode() { |
| final int prime = 31; |
| int result = 1; |
| result = prime * result + ((scope == null) ? 0 : scope.hashCode()); |
| result = prime * result + ((name == null) ? 0 : name.hashCode()); |
| result = prime * result + ((version == null) ? 0 : version.hashCode()); |
| return result; |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see java.lang.Object#equals(java.lang.Object) |
| */ |
| @Override |
| public boolean equals(Object obj) { |
| if (this == obj) { |
| return true; |
| } |
| if (obj == null) { |
| return false; |
| } |
| if (getClass() != obj.getClass()) { |
| return false; |
| } |
| PageResourceId other = (PageResourceId) obj; |
| if (scope == null) { |
| if (other.scope != null) { |
| return false; |
| } |
| } else if (!scope.equals(other.scope)) { |
| return false; |
| } |
| if (name == null) { |
| if (other.name != null) { |
| return false; |
| } |
| } else if (!name.equals(other.name)) { |
| return false; |
| } |
| if (version == null) { |
| if (other.version != null) { |
| return false; |
| } |
| } else if (!version.equals(other.version)) { |
| return false; |
| } |
| return true; |
| } |
| |
| /** |
| * Allows page resource IDs to be compared and ordered. |
| * <p> |
| * Note that it doesn't really make much since to order page resource IDs unless they |
| * they refer to the same type of resource (meaning that they differ only in version). |
| */ |
| @Override |
| public int compareTo(PageResourceId id) { |
| if (!equals(id)) { |
| if (id == null) { |
| return 1; |
| } |
| if (scope == null) { |
| if (id.scope != null) { |
| return -1; |
| } |
| } else if (!scope.equals(id.scope)) { |
| return scope.compareTo(id.scope); |
| } |
| if (name == null) { |
| if (id.name != null) { |
| return -1; |
| } |
| } else if (!name.equals(id.name)) { |
| return name.compareTo(id.name); |
| } |
| |
| // now they must differ only in version |
| |
| String currVersion = null; |
| String newVersion = null; |
| String[] currDecimals = new String[0]; |
| String[] newDecimals = new String[0]; |
| |
| // Extract the dotted decimal version numbers |
| String regex = "^[vV=]{0,1}(\\d+(?:\\.\\d+){0,2}).*$"; |
| currVersion = version.replaceFirst(regex, "$1"); |
| newVersion = id.version.replaceFirst(regex, "$1"); |
| |
| String dottedDecimalRegex = "^\\d+(?:\\.\\d+)*$"; |
| if (currVersion.matches(dottedDecimalRegex)) { |
| |
| // the current version is conforming dotted decimal. |
| // If the new version is also conforming, compare version numbers. |
| // otherwise new version is less then this one. |
| |
| if (newVersion.matches(dottedDecimalRegex)) { |
| currDecimals = currVersion.split("\\."); |
| newDecimals = newVersion.split("\\."); |
| for (int ii = 0; (ii < currDecimals.length) && (ii < newDecimals.length); ii++) { |
| int currDigit = Integer.parseInt(currDecimals[ii]); |
| int newDigit = Integer.parseInt(newDecimals[ii]); |
| if (newDigit > currDigit) { |
| return 1; |
| } else if (newDigit < currDigit) { |
| return -1; |
| } |
| } |
| |
| // they're equal so far, so the one with the most digits is greater |
| |
| if (currDecimals.length > newDecimals.length) { |
| return -1; |
| } else if (currDecimals.length < newDecimals.length) { |
| return 1; |
| } |
| } |
| |
| } else { |
| |
| // If new version conforms, use it, otherwise string compare |
| |
| if (newVersion.matches(dottedDecimalRegex)) { |
| return 1; |
| } else { |
| // if neither conform, use string compare |
| return version.compareTo(id.version); |
| } |
| |
| } |
| |
| } |
| return 0; |
| } |
| |
| } |