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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
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package com.sun.org.apache.xml.internal.security.utils.resolver;

import java.util.HashMap;
import java.util.Map;

import com.sun.org.apache.xml.internal.security.signature.XMLSignatureInput;


During reference validation, we have to retrieve resources from somewhere.

/**
 * During reference validation, we have to retrieve resources from somewhere.
 *
 */
public abstract class ResourceResolverSpi {

    private static final com.sun.org.slf4j.internal.Logger LOG =
        com.sun.org.slf4j.internal.LoggerFactory.getLogger(ResourceResolverSpi.class);

    
Field properties 
/** Field properties */
    protected Map<String, String> properties;

    
This is the workhorse method used to resolve resources.

Params:
  • context – Context to use to resolve resources.
Throws:
Returns:the resource wrapped around a XMLSignatureInput
/**
     * This is the workhorse method used to resolve resources.
     * @param context Context to use to resolve resources.
     *
     * @return the resource wrapped around a XMLSignatureInput
     *
     * @throws ResourceResolverException
     */
    public abstract XMLSignatureInput engineResolveURI(ResourceResolverContext context)
        throws ResourceResolverException;

    
Method engineSetProperty

Params:
  • key – 
  • value – 
/**
     * Method engineSetProperty
     *
     * @param key
     * @param value
     */
    public void engineSetProperty(String key, String value) {
        if (properties == null) {
            properties = new HashMap<>();
        }
        properties.put(key, value);
    }

    
Method engineGetProperty

Params:
  • key – 
Returns:the value of the property
/**
     * Method engineGetProperty
     *
     * @param key
     * @return the value of the property
     */
    public String engineGetProperty(String key) {
        if (properties == null) {
            return null;
        }
        return properties.get(key);
    }

    
Params:
  • newProperties – 
/**
     *
     * @param newProperties
     */
    public void engineAddProperies(Map<String, String> newProperties) {
        if (newProperties != null && !newProperties.isEmpty()) {
            if (properties == null) {
                properties = new HashMap<>();
            }
            properties.putAll(newProperties);
        }
    }

    
Tells if the implementation does can be reused by several threads safely.
It normally means that the implementation does not have any member, or there is
member change between engineCanResolve and engineResolve invocations. Or it maintains all
member info in ThreadLocal methods.

/**
     * Tells if the implementation does can be reused by several threads safely.
     * It normally means that the implementation does not have any member, or there is
     * member change between engineCanResolve and engineResolve invocations. Or it maintains all
     * member info in ThreadLocal methods.
     */
    public boolean engineIsThreadSafe() {
        return false;
    }

    
This method helps the ResourceResolver to decide whether a ResourceResolverSpi is able to perform the requested action. 
Params:
  • context – Context in which to do resolution.
Returns:true if the engine can resolve the uri
/**
     * This method helps the {@link ResourceResolver} to decide whether a
     * {@link ResourceResolverSpi} is able to perform the requested action.
     *
     * @param context Context in which to do resolution.
     * @return true if the engine can resolve the uri
     */
    public abstract boolean engineCanResolveURI(ResourceResolverContext context);

    
Method engineGetPropertyKeys

Returns:the property keys
/**
     * Method engineGetPropertyKeys
     *
     * @return the property keys
     */
    public String[] engineGetPropertyKeys() {
        return new String[0];
    }

    
Method understandsProperty

Params:
  • propertyToTest – 
Returns:true if understands the property
/**
     * Method understandsProperty
     *
     * @param propertyToTest
     * @return true if understands the property
     */
    public boolean understandsProperty(String propertyToTest) {
        String[] understood = this.engineGetPropertyKeys();

        if (understood != null) {
            for (String str : understood) {
                if (str.equals(propertyToTest)) {
                    return true;
                }
            }
        }

        return false;
    }


    
Fixes a platform dependent filename to standard URI form.

Params:
  • str – The string to fix.
Returns:Returns the fixed URI string.
/**
     * Fixes a platform dependent filename to standard URI form.
     *
     * @param str The string to fix.
     *
     * @return Returns the fixed URI string.
     */
    public static String fixURI(String str) {

        // handle platform dependent strings
        str = str.replace(java.io.File.separatorChar, '/');

        if (str.length() >= 4) {

            // str =~ /^\W:\/([^/])/ # to speak perl ;-))
            char ch0 = Character.toUpperCase(str.charAt(0));
            char ch1 = str.charAt(1);
            char ch2 = str.charAt(2);
            char ch3 = str.charAt(3);
            boolean isDosFilename = 'A' <= ch0 && ch0 <= 'Z'
                && ch1 == ':' && ch2 == '/'
                && ch3 != '/';

            if (isDosFilename) {
                LOG.debug("Found DOS filename: {}", str);
            }
        }

        // Windows fix
        if (str.length() >= 2) {
            char ch1 = str.charAt(1);

            if (ch1 == ':') {
                char ch0 = Character.toUpperCase(str.charAt(0));

                if ('A' <= ch0 && ch0 <= 'Z') {
                    str = "/" + str;
                }
            }
        }

        // done
        return str;
    }
}