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Apache CXF example source code file (PolicyUtils.java)

This example Apache CXF source code file (PolicyUtils.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Apache CXF tags/keywords

all, assertion, assertion, indent, list, log, logging, object, policy, policycomponent, policycomponent, policyutils, string, string, stringbuilder, stringbuilder, util

The Apache CXF PolicyUtils.java source code

/**
 * 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.helpers.CastUtils;
import org.apache.cxf.ws.policy.builder.primitive.NestedPrimitiveAssertion;
import org.apache.neethi.Assertion;
import org.apache.neethi.Constants;
import org.apache.neethi.Policy;
import org.apache.neethi.PolicyComponent;
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;
        }
        
        List components = p.getPolicyComponents();
        
        for (Object component : components) {
            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<Assertion> 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<Assertion> assertions, 
                                   Collection<Assertion> 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 NestedPrimitiveAssertion) {
                PolicyComponent nested = ((NestedPrimitiveAssertion)pc).getPolicy();
                level++;
                printPolicyComponent(nested, buf, level);
                level--;                
            }
        } else {
            level++;
            List<PolicyComponent> 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(System.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 "";
    }
    
}

Other Apache CXF examples (source code examples)

Here is a short list of links related to this Apache CXF PolicyUtils.java source code file:

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