Java tutorial
/* * 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.openaz.xacml.std.pap; import java.io.FileNotFoundException; import java.io.IOException; import java.io.InputStream; import java.io.Serializable; import java.net.URI; import java.net.URL; import java.util.ArrayList; import java.util.Properties; import oasis.names.tc.xacml._3_0.core.schema.wd_17.PolicySetType; import oasis.names.tc.xacml._3_0.core.schema.wd_17.PolicyType; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.apache.openaz.xacml.api.pap.PAPException; import org.apache.openaz.xacml.api.pap.PDPPolicy; import org.apache.openaz.xacml.util.XACMLPolicyScanner; import com.fasterxml.jackson.annotation.JsonIgnore; import com.google.common.base.Splitter; import com.google.common.collect.Lists; public class StdPDPPolicy implements PDPPolicy, Serializable { private static final long serialVersionUID = 1L; private static Log logger = LogFactory.getLog(StdPDPPolicy.class); private String id = null; private String name = null; private String policyId = null; private String description = null; private int[] version = null; private boolean isRoot = false; private boolean isValid = false; private URI location = null; public StdPDPPolicy(String id, boolean isRoot) { this.id = id; this.isRoot = isRoot; } public StdPDPPolicy(String id, boolean isRoot, String name) { this(id, isRoot); this.name = name; } public StdPDPPolicy(String id, boolean isRoot, String name, URI location) throws IOException { this(id, isRoot); this.name = name; this.location = location; // // Read the policy data // String theID = this.readPolicyData(); if (this.id == null) { this.id = theID; } } public StdPDPPolicy(String id, boolean isRoot, URI location, Properties properties) throws IOException { this(id, isRoot); this.location = location; // // Read the policy data // this.readPolicyData(); // // See if there's a name // for (Object key : properties.keySet()) { if (key.toString().equals(id + ".name")) { this.name = properties.getProperty(key.toString()); break; } } } private String readPolicyData() throws IOException { // // Extract XACML policy information // URL url = this.location.toURL(); Object rootElement = XACMLPolicyScanner.readPolicy(url.openStream()); if (rootElement == null || !(rootElement instanceof PolicySetType) && !(rootElement instanceof PolicyType)) { logger.warn("No root policy element in URI: " + this.location.toString() + " : " + rootElement); this.isValid = false; } else { this.version = versionStringToArray(XACMLPolicyScanner.getVersion(rootElement)); if (rootElement instanceof PolicySetType) { this.policyId = ((PolicySetType) rootElement).getPolicySetId(); this.description = ((PolicySetType) rootElement).getDescription(); this.isValid = true; this.version = versionStringToArray(((PolicySetType) rootElement).getVersion()); } else if (rootElement instanceof PolicyType) { this.policyId = ((PolicyType) rootElement).getPolicyId(); this.description = ((PolicyType) rootElement).getDescription(); this.version = versionStringToArray(((PolicyType) rootElement).getVersion()); this.isValid = true; } else { logger.error("Unknown root element: " + rootElement.getClass().getCanonicalName()); } } if (this.policyId != null) { ArrayList<String> foo = Lists.newArrayList(Splitter.on(':').split(this.policyId)); if (!foo.isEmpty()) { return foo.get(foo.size() - 1); } } return null; } @Override public String getId() { return id; } public void setId(String id) { this.id = id; } @Override public String getName() { return this.name; } public void setName(String name) { this.name = name; } @Override public String getPolicyId() { return this.policyId; } @Override public String getDescription() { return this.description; } @Override public String getVersion() { return versionArrayToString(this.version); } @Override @JsonIgnore public int[] getVersionInts() { return version; } @Override public boolean isRoot() { return this.isRoot; } @Override public boolean isValid() { return this.isValid; } @Override @JsonIgnore public InputStream getStream() throws PAPException, IOException { try { if (this.location != null) { URL url = this.location.toURL(); return url.openStream(); } return null; } catch (FileNotFoundException e) { throw new PAPException(e); } } @Override public URI getLocation() throws PAPException { return this.location; } @Override public int hashCode() { final int prime = 31; int result = 1; result = prime * result + ((id == null) ? 0 : id.hashCode()); result = prime * result + ((policyId == null) ? 0 : policyId.hashCode()); result = prime * result; if (version != null) { for (int i = 0; i < version.length; i++) { result += version[i]; } } return result; } @Override public boolean equals(Object obj) { if (this == obj) return true; if (obj == null) return false; if (getClass() != obj.getClass()) return false; StdPDPPolicy other = (StdPDPPolicy) obj; if (id == null) { if (other.id != null) return false; } else if (!id.equals(other.id)) return false; if (policyId == null) { if (other.policyId != null) return false; } else if (!policyId.equals(other.policyId)) return false; if (version != other.version) return false; return true; } @Override public String toString() { return "StdPDPPolicy [id=" + id + ", name=" + name + ", policyId=" + policyId + ", description=" + description + ", version=" + this.getVersion() + ", isRoot=" + isRoot + ", isValid=" + isValid + ", location=" + location + "]"; } /** * Given a version string consisting of integers with dots between them, convert it into an array of ints. * * @param version * @return * @throws NumberFormatException */ public static int[] versionStringToArray(String version) throws NumberFormatException { if (version == null || version.length() == 0) { return new int[0]; } String[] stringArray = version.split("\\."); int[] resultArray = new int[stringArray.length]; for (int i = 0; i < stringArray.length; i++) { resultArray[i] = Integer.parseInt(stringArray[i]); } return resultArray; } /** * Given an array representing a version, create the corresponding dot-separated string. * * @param array * @return */ public static String versionArrayToString(int[] array) { if (array == null || array.length == 0) { return ""; } String versionString = ""; if (array.length > 0) { versionString = "" + array[0]; for (int i = 1; i < array.length; i++) { versionString += "." + array[i]; } } return versionString; } // // Methods needed for JSON Deserialization // public StdPDPPolicy() { } public void setPolicyId(String policyId) { this.policyId = policyId; } public void setDescription(String description) { this.description = description; } public void setVersion(String version) { this.version = versionStringToArray(version); } public void setRoot(boolean isRoot) { this.isRoot = isRoot; } public void setValid(boolean isValid) { this.isValid = isValid; } public void setLocation(URI location) { this.location = location; } }