resourceattributes.java

业界著名的tomcat服务器的最新6.0的源代码。

            return lastModified;
        if (lastModifiedDate != null)
            return lastModifiedDate.getTime();
        if (attributes != null) {
            Attribute attribute = attributes.get(LAST_MODIFIED);
            if (attribute != null) {
                try {
                    Object value = attribute.get();
                    if (value instanceof Long) {
                        lastModified = ((Long) value).longValue();
                    } else if (value instanceof Date) {
                        lastModified = ((Date) value).getTime();
                        lastModifiedDate = (Date) value;
                    } else {
                        String lastModifiedDateValue = value.toString();
                        Date result = null;
                        // Parsing the HTTP Date
                        for (int i = 0; (result == null) && 
                                 (i < formats.length); i++) {
                            try {
                                result = 
                                    formats[i].parse(lastModifiedDateValue);
                            } catch (ParseException e) {
                                ;
                            }
                        }
                        if (result != null) {
                            lastModified = result.getTime();
                            lastModifiedDate = result;
                        }
                    }
                } catch (NamingException e) {
                    ; // No value for the attribute
                }
            }
        }
        return lastModified;
    }
    
    
    /**
     * Set last modified.
     * 
     * @param lastModified New last modified value
     */
    public void setLastModified(long lastModified) {
        this.lastModified = lastModified;
        this.lastModifiedDate = null;
        if (attributes != null)
            attributes.put(LAST_MODIFIED, new Date(lastModified));
    }
    
    
    /**
     * Set last modified date.
     * 
     * @param lastModified New last modified date value
     * @deprecated
     */
    public void setLastModified(Date lastModified) {
        setLastModifiedDate(lastModified);
    }


    /**
     * Get lastModified date.
     * 
     * @return LastModified date value
     */
    public Date getLastModifiedDate() {
        if (lastModifiedDate != null)
            return lastModifiedDate;
        if (lastModified != -1L) {
            lastModifiedDate = new Date(lastModified);
            return lastModifiedDate;
        }
        if (attributes != null) {
            Attribute attribute = attributes.get(LAST_MODIFIED);
            if (attribute != null) {
                try {
                    Object value = attribute.get();
                    if (value instanceof Long) {
                        lastModified = ((Long) value).longValue();
                        lastModifiedDate = new Date(lastModified);
                    } else if (value instanceof Date) {
                        lastModified = ((Date) value).getTime();
                        lastModifiedDate = (Date) value;
                    } else {
                        String lastModifiedDateValue = value.toString();
                        Date result = null;
                        // Parsing the HTTP Date
                        for (int i = 0; (result == null) && 
                                 (i < formats.length); i++) {
                            try {
                                result = 
                                    formats[i].parse(lastModifiedDateValue);
                            } catch (ParseException e) {
                                ;
                            }
                        }
                        if (result != null) {
                            lastModified = result.getTime();
                            lastModifiedDate = result;
                        }
                    }
                } catch (NamingException e) {
                    ; // No value for the attribute
                }
            }
        }
        return lastModifiedDate;
    }
    
    
    /**
     * Last modified date mutator.
     * 
     * @param lastModifiedDate New last modified date
     */
    public void setLastModifiedDate(Date lastModifiedDate) {
        this.lastModified = lastModifiedDate.getTime();
        this.lastModifiedDate = lastModifiedDate;
        if (attributes != null)
            attributes.put(LAST_MODIFIED, lastModifiedDate);
    }
    
    
    /**
     * @return Returns the lastModifiedHttp.
     */
    public String getLastModifiedHttp() {
        if (lastModifiedHttp != null)
            return lastModifiedHttp;
        Date modifiedDate = getLastModifiedDate();
        if (modifiedDate == null) {
            modifiedDate = getCreationDate();
        }
        if (modifiedDate == null) {
            modifiedDate = new Date();
        }
        synchronized (format) {
            lastModifiedHttp = format.format(modifiedDate);
        }
        return lastModifiedHttp;
    }
    
    
    /**
     * @param lastModifiedHttp The lastModifiedHttp to set.
     */
    public void setLastModifiedHttp(String lastModifiedHttp) {
        this.lastModifiedHttp = lastModifiedHttp;
    }
    
    
    /**
     * @return Returns the mimeType.
     */
    public String getMimeType() {
        return mimeType;
    }
    
    
    /**
     * @param mimeType The mimeType to set.
     */
    public void setMimeType(String mimeType) {
        this.mimeType = mimeType;
    }

    
    /**
     * Get name.
     * 
     * @return Name value
     */
    public String getName() {
        if (name != null)
            return name;
        if (attributes != null) {
            Attribute attribute = attributes.get(NAME);
            if (attribute != null) {
                try {
                    name = attribute.get().toString();
                } catch (NamingException e) {
                    ; // No value for the attribute
                }
            }
        }
        return name;
    }


    /**
     * Set name.
     * 
     * @param name New name value
     */
    public void setName(String name) {
        this.name = name;
        if (attributes != null)
            attributes.put(NAME, name);
    }
    
    
    /**
     * Get resource type.
     * 
     * @return String resource type
     */
    public String getResourceType() {
        String result = null;
        if (attributes != null) {
            Attribute attribute = attributes.get(TYPE);
            if (attribute != null) {
                try {
                    result = attribute.get().toString();
                } catch (NamingException e) {
                    ; // No value for the attribute
                }
            }
        }
        if (result == null) {
            if (collection)
                result = COLLECTION_TYPE;
            else
                result = "";
        }
        return result;
    }
    
    
    /**
     * Type mutator.
     * 
     * @param resourceType New resource type
     */
    public void setResourceType(String resourceType) {
        collection = resourceType.equals(COLLECTION_TYPE);
        if (attributes != null)
            attributes.put(TYPE, resourceType);
    }


    /**
     * Get ETag.
     * 
     * @return Weak ETag
     */
    public String getETag() {
        return getETag(false);
    }


    /**
     * Get ETag.
     * 
     * @param strong If true, the strong ETag will be returned
     * @return ETag
     */
    public String getETag(boolean strong) {
        String result = null;
        if (attributes != null) {
            Attribute attribute = attributes.get(ETAG);
            if (attribute != null) {
                try {
                    result = attribute.get().toString();
                } catch (NamingException e) {
                    ; // No value for the attribute
                }
            }
        }
        if (strong) {
            // The strong ETag must always be calculated by the resources
            result = strongETag;
        } else {
            // The weakETag is contentLenght + lastModified
            if (weakETag == null) {
                weakETag = "W/\"" + getContentLength() + "-" 
                    + getLastModified() + "\"";
            }
            result = weakETag;
        }
        return result;
    }


    /**
     * Set strong ETag.
     */
    public void setETag(String eTag) {
        this.strongETag = eTag;
        if (attributes != null)
            attributes.put(ETAG, eTag);
    }

    
    /**
     * Return the canonical path of the resource, to possibly be used for 
     * direct file serving. Implementations which support this should override
     * it to return the file path.
     * 
     * @return The canonical path of the resource
     */
    public String getCanonicalPath() {
        return null;
    }
    
    
    // ----------------------------------------------------- Attributes Methods


    /**
     * Get attribute.
     */
    public Attribute get(String attrID) {
        if (attributes == null) {
            if (attrID.equals(CREATION_DATE)) {
                return new BasicAttribute(CREATION_DATE, getCreationDate());
            } else if (attrID.equals(ALTERNATE_CREATION_DATE)) {
                return new BasicAttribute(ALTERNATE_CREATION_DATE, 
                                          getCreationDate());
            } else if (attrID.equals(LAST_MODIFIED)) {
                return new BasicAttribute(LAST_MODIFIED, 
                                          getLastModifiedDate());
            } else if (attrID.equals(ALTERNATE_LAST_MODIFIED)) {
                return new BasicAttribute(ALTERNATE_LAST_MODIFIED,
                                          getLastModifiedDate());
            } else if (attrID.equals(NAME)) {
                return new BasicAttribute(NAME, getName());
            } else if (attrID.equals(TYPE)) {
                return new BasicAttribute(TYPE, getResourceType());
            } else if (attrID.equals(ALTERNATE_TYPE)) {
                return new BasicAttribute(ALTERNATE_TYPE, getResourceType());
            } else if (attrID.equals(CONTENT_LENGTH)) {
                return new BasicAttribute(CONTENT_LENGTH, 
                                          new Long(getContentLength()));
            } else if (attrID.equals(ALTERNATE_CONTENT_LENGTH)) {
                return new BasicAttribute(ALTERNATE_CONTENT_LENGTH, 
                                          new Long(getContentLength()));
            }
        } else {
            return attributes.get(attrID);
        }
        return null;
    }
    
    
    /**
     * Put attribute.
     */
    public Attribute put(Attribute attribute) {
        if (attributes == null) {
            try {
                return put(attribute.getID(), attribute.get());
            } catch (NamingException e) {
                return null;
            }
        } else {
            return attributes.put(attribute);
        }
    }
    
    
    /**
     * Put attribute.
     */
    public Attribute put(String attrID, Object val) {
        if (attributes == null) {
            return null; // No reason to implement this
        } else {
            return attributes.put(attrID, val);
        }
    }
    
    
    /**
     * Remove attribute.
     */
    public Attribute remove(String attrID) {
        if (attributes == null) {
            return null; // No reason to implement this
        } else {
            return attributes.remove(attrID);
        }
    }
    
    
    /**
     * Get all attributes.
     */
    public NamingEnumeration getAll() {
        if (attributes == null) {
            Vector attributes = new Vector();
            attributes.addElement(new BasicAttribute
                                  (CREATION_DATE, getCreationDate()));
            attributes.addElement(new BasicAttribute
                                  (LAST_MODIFIED, getLastModifiedDate()));
            attributes.addElement(new BasicAttribute(NAME, getName()));
            attributes.addElement(new BasicAttribute(TYPE, getResourceType()));
            attributes.addElement
                (new BasicAttribute(CONTENT_LENGTH, 
                                    new Long(getContentLength())));
            return new RecyclableNamingEnumeration(attributes);
        } else {
            return attributes.getAll();
        }
    }
    
    
    /**
     * Get all attribute IDs.
     */
    public NamingEnumeration getIDs() {
        if (attributes == null) {
            Vector attributeIDs = new Vector();
            attributeIDs.addElement(CREATION_DATE);
            attributeIDs.addElement(LAST_MODIFIED);
            attributeIDs.addElement(NAME);
            attributeIDs.addElement(TYPE);
            attributeIDs.addElement(CONTENT_LENGTH);
            return new RecyclableNamingEnumeration(attributeIDs);
        } else {
            return attributes.getIDs();
        }
    }
    
    
    /**
     * Retrieves the number of attributes in the attribute set.
     */
    public int size() {
        if (attributes == null) {
            return 5;
        } else {
            return attributes.size();
        }
    }
    
    
    /**
     * Clone the attributes object (WARNING: fake cloning).
     */
    public Object clone() {
        return this;
    }
    
    
    /**
     * Case sensitivity.
     */
    public boolean isCaseIgnored() {
        return false;
    }
    
    
}