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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.ws.policy;
import java.util.Collection;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.apache.cxf.common.util.SystemPropertyAction;
import org.apache.cxf.helpers.CastUtils;
import org.apache.neethi.Assertion;
import org.apache.neethi.Constants;
import org.apache.neethi.Policy;
import org.apache.neethi.PolicyComponent;
import org.apache.neethi.PolicyContainingAssertion;
import org.apache.neethi.PolicyOperator;
/**
*
*/
public final class PolicyUtils {
private static final String INDENT = " ";
private PolicyUtils() {
}
/**
* Checks if a given policy contains no policy components
* or if it has only empty ExactlyOne or All components
* containing no assertions
*
* @param p the policy
* @return true if the policy is empty
*/
public static boolean isEmptyPolicy(Policy p) {
return isEmptyPolicyOperator(p);
}
/**
* Checks if a given policy operator has no policy components
* or if it has only empty ExactlyOne or All components
* containing no assertions
*
* @param p the policy operator
* @return true if this policy operator is empty
*/
public static boolean isEmptyPolicyOperator(PolicyOperator p) {
if (p.isEmpty()) {
return true;
}
for (PolicyComponent component : p.getPolicyComponents()) {
if (!(component instanceof PolicyOperator)
|| !isEmptyPolicyOperator((PolicyOperator)component)) {
return false;
}
}
return true;
}
/**
* Determine if a collection of assertions contains a given assertion, using
* the equal method from the Assertion interface.
*
* @param assertions a collection of assertions
* @param candidate the assertion to test
* @return true iff candidate is equal to one of the assertions in the collection
*/
public static boolean contains(Collection assertions, Assertion candidate) {
for (Assertion a : assertions) {
if (a.equal(candidate)) {
return true;
}
}
return false;
}
/**
* Determine if one collection of assertions contains another collection of assertion, using
* the equal method from the Assertion interface.
*
* @param assertions a collection of assertions
* @param candidates the collections of assertion to test
* @return true iff each candidate is equal to one of the assertions in the collection
*/
public static boolean contains(Collection assertions,
Collection candidates) {
if (null == candidates || candidates.isEmpty()) {
return true;
}
for (Assertion c : candidates) {
if (!contains(assertions, c)) {
return false;
}
}
return true;
}
public static void logPolicy(Logger log, Level level, String msg, PolicyComponent pc) {
if (!log.isLoggable(level)) {
return;
}
if (null == pc) {
log.log(level, msg);
return;
}
StringBuilder buf = new StringBuilder();
buf.append(msg);
nl(buf);
printPolicyComponent(pc, buf, 0);
log.log(level, buf.toString());
}
public static void printPolicyComponent(PolicyComponent pc) {
StringBuilder buf = new StringBuilder();
printPolicyComponent(pc, buf, 0);
System.out.println(buf.toString());
}
public static void printPolicyComponent(PolicyComponent pc, StringBuilder buf, int level) {
indent(buf, level);
buf.append("type: ");
buf.append(typeToString(pc.getType()));
if (Constants.TYPE_ASSERTION == pc.getType()) {
buf.append(" ");
buf.append(((Assertion)pc).getName());
if (((Assertion)pc).isOptional()) {
buf.append(" (optional)");
}
buf.append(" (");
buf.append((Assertion)pc);
buf.append(")");
nl(buf);
if (pc instanceof PolicyContainingAssertion) {
PolicyComponent nested = ((PolicyContainingAssertion)pc).getPolicy();
level++;
printPolicyComponent(nested, buf, level);
level--;
}
} else {
level++;
List children = CastUtils.cast(((PolicyOperator)pc).getPolicyComponents(),
PolicyComponent.class);
nl(buf);
for (PolicyComponent child : children) {
printPolicyComponent(child, buf, level);
}
level--;
}
}
private static void indent(StringBuilder buf, int level) {
for (int i = 0; i < level; i++) {
buf.append(INDENT);
}
}
private static void nl(StringBuilder buf) {
buf.append(SystemPropertyAction.getProperty("line.separator"));
}
private static String typeToString(short type) {
switch(type) {
case Constants.TYPE_ASSERTION:
return "Assertion";
case Constants.TYPE_ALL:
return "All";
case Constants.TYPE_EXACTLYONE:
return "ExactlyOne";
case Constants.TYPE_POLICY:
return "Policy";
case Constants.TYPE_POLICY_REF:
return "PolicyReference";
default:
break;
}
return "";
}
}