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    1   package org.apache.turbine.services.pull.tools;
    2
    3
    4   /*
    5    * Licensed to the Apache Software Foundation (ASF) under one
    6    * or more contributor license agreements.  See the NOTICE file
    7    * distributed with this work for additional information
    8    * regarding copyright ownership.  The ASF licenses this file
    9    * to you under the Apache License, Version 2.0 (the
    10   * "License"); you may not use this file except in compliance
    11   * with the License.  You may obtain a copy of the License at
    12   *
    13   *   http://www.apache.org/licenses/LICENSE-2.0
    14   *
    15   * Unless required by applicable law or agreed to in writing,
    16   * software distributed under the License is distributed on an
    17   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
    18   * KIND, either express or implied.  See the License for the
    19   * specific language governing permissions and limitations
    20   * under the License.
    21   */
    22
    23
    24
    25  import org.apache.commons.configuration.Configuration;
    26  import org.apache.turbine.Turbine;
    27  import org.apache.turbine.pipeline.PipelineData;
    28  import org.apache.turbine.services.pull.ApplicationTool;
    29  import org.apache.turbine.util.RunData;
    30  import org.apache.turbine.util.uri.DataURI;
    31
    32  /**
    33   * Terribly simple tool to translate URIs into Turbine Links.
    34   * Equivalent to URIUtils.getAbsoluteLink() in a pull tool.
    35   *
    36   * <p>
    37   * If you're missing any routines from the 'old' $content tool concerning
    38   * path_info or query data, you did use the wrong tool then. You should've used
    39   * the TemplateLink tool which should be available as "$link" in your context.
    40   * <p>
    41   *
    42   * This is an application pull tool for the template system. You should <b>not</b>
    43   * use it in a normal application!
    44   *
    45   * @author <a href="mailto:hps@intermeta.de">Henning P. Schmiedehausen</a>
    46   * @author <a href="mailto:peter@courcoux.biz">Peter Courcoux</a>
    47   * @version $Id: ContentTool.java 1078552 2011-03-06 19:58:46Z tv $
    48   */
    49
    50  public class ContentTool
    51      implements ApplicationTool
    52  {
    53      /** Prefix for Parameters for this tool */
    54      public static final String CONTENT_TOOL_PREFIX = "tool.content";
    55
    56      /**
    57       * Should this tool add Container Encoding to the URIs returned?
    58       * True might cause trouble e.g. if you run with Apache HTTP Daemon / Tomcat Combo.
    59       *
    60       * Default is false (like Turbine 2.2)
    61       */
    62      public static final String CONTENT_TOOL_ENCODING_KEY = "want.encoding";
    63
    64      /** Default Value for CONTENT_TOOL_ENCODING_KEY */
    65      public static final boolean CONTENT_TOOL_ENCODING_DEFAULT = false;
    66
    67      /** Should this tool return relative URIs or absolute? Default: Absolute. */
    68      public static final String CONTENT_TOOL_RELATIVE_KEY = "want.relative";
    69
    70      /** Default Value for CONTENT_TOOL_RELATIVE_KEY */
    71      public static final boolean CONTENT_TOOL_RELATIVE_DEFAULT = false;
    72
    73      /** Do we want the container to encode the response? */
    74      boolean wantEncoding = false;
    75
    76      /** Do we want a relative link? */
    77      boolean wantRelative = false;
    78
    79      /** Caches a DataURI object which provides the translation routines */
    80      private DataURI dataURI = null;
    81
    82      /**
    83       * C'tor
    84       */
    85      public ContentTool()
    86      {
    87          // empty
    88      }
    89
    90      /*
    91       * ========================================================================
    92       *
    93       * Application Tool Interface
    94       *
    95       * ========================================================================
    96       *
    97       */
    98
    99      /**
    100      * This will initialise a ContentTool object that was
    101      * constructed with the default constructor (ApplicationTool
    102      * method).
    103      *
    104      * @param data assumed to be a RunData object
    105      */
    106     public void init(Object data)
    107     {
    108         // we just blithely cast to RunData as if another object
    109         // or null is passed in we'll throw an appropriate runtime
    110         // exception.
    111         if (data instanceof PipelineData)
    112         {
    113             PipelineData pipelineData = (PipelineData) data;
    114             RunData runData = (RunData)pipelineData;
    115             dataURI = new DataURI(runData);
    116         }
    117         else
    118         {
    119             dataURI = new DataURI((RunData) data);
    120
    121         }
    122
    123         Configuration conf =
    124                 Turbine.getConfiguration().subset(CONTENT_TOOL_PREFIX);
    125
    126         if (conf != null)
    127         {
    128             wantRelative = conf.getBoolean(CONTENT_TOOL_RELATIVE_KEY,
    129                     CONTENT_TOOL_RELATIVE_DEFAULT);
    130
    131             wantEncoding = conf.getBoolean(CONTENT_TOOL_ENCODING_KEY,
    132                     CONTENT_TOOL_ENCODING_DEFAULT);
    133         }
    134
    135         if (!wantEncoding)
    136         {
    137             dataURI.clearResponse();
    138         }
    139     }
    140
    141     /**
    142      * Refresh method - does nothing
    143      */
    144     public void refresh()
    145     {
    146         // empty
    147     }
    148
    149     /**
    150      * Returns the Turbine URI of a given Path
    151      *
    152      * @param path The path to translate
    153      *
    154      * @return Turbine translated absolute path
    155      */
    156     public String getURI(String path)
    157     {
    158         dataURI.setScriptName(path);
    159
    160         return wantRelative ?
    161                 dataURI.getRelativeLink() : dataURI.getAbsoluteLink();
    162     }
    163
    164     /**
    165      * Returns the Turbine URI of a given Path. The
    166      * result is always an absolute path starting with
    167      * the server scheme (http/https).
    168      *
    169      * @param path The path to translate
    170      *
    171      * @return Turbine translated absolute path
    172      */
    173     public String getAbsoluteURI(String path)
    174     {
    175         dataURI.setScriptName(path);
    176
    177         return dataURI.getAbsoluteLink();
    178     }
    179
    180     /**
    181      * Returns the Turbine URI of a given Path. The
    182      * result is always relative to the context of
    183      * the application.
    184      *
    185      * @param path The path to translate
    186      *
    187      * @return Turbine translated absolute path
    188      */
    189     public String getRelativeURI(String path)
    190     {
    191         dataURI.setScriptName(path);
    192
    193         return dataURI.getRelativeLink();
    194     }
    195
    196 }