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## org.apache.tools.ant.util
Class ResourceUtils

    java.lang.Object
      org.apache.tools.ant.util.ResourceUtils

    public class ResourceUtils

extends java.lang.Object

This class provides utility methods to process Resources.

Since:
  Ant 1.5.2

Constructor Summary
`ResourceUtils()`

Method Summary
`static int` | `compareContent(Resource r1, Resource r2, boolean text)` Compare the content of two Resources.
`static boolean` | `contentEquals(Resource r1, Resource r2, boolean text)` Compares the contents of two Resources.
`static void` | `copyResource(Resource source, Resource dest)` Convenience method to copy content from one Resource to another.
`static void` | `copyResource(Resource source, Resource dest, FilterSetCollection filters, java.util.Vector filterChains, boolean overwrite, boolean preserveLastModified, java.lang.String inputEncoding, java.lang.String outputEncoding, Project project)` Convenience method to copy content from one Resource to another specifying whether token filtering must be used, whether filter chains must be used, whether newer destination files may be overwritten and whether the last modified time of `dest` file should be made equal to the last modified time of `source`.
`static void` | `copyResource(Resource source, Resource dest, Project project)` Convenience method to copy content from one Resource to another.
`static Resource[]` | `selectOutOfDateSources(ProjectComponent logTo, Resource[] source, FileNameMapper mapper, ResourceFactory targets)` Tells which source files should be reprocessed based on the last modification date of target files.
`static Resource[]` | `selectOutOfDateSources(ProjectComponent logTo, Resource[] source, FileNameMapper mapper, ResourceFactory targets, long granularity)` Tells which source files should be reprocessed based on the last modification date of target files.
`static ResourceCollection` | `selectOutOfDateSources(ProjectComponent logTo, ResourceCollection source, FileNameMapper mapper, ResourceFactory targets, long granularity)` Tells which sources should be reprocessed based on the last modification date of targets.
`static void` | `setLastModified(Touchable t, long time)` Set the last modified time of an object implementing org.apache.tools.ant.types.resources.Touchable .

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### ResourceUtils

    public ResourceUtils()

Method Detail

### selectOutOfDateSources

    public static Resource[] selectOutOfDateSources(ProjectComponent logTo,
                                                    Resource[] source,
                                                    FileNameMapper mapper,
                                                    ResourceFactory targets)

  Tells which source files should be reprocessed based on the last modification date of target files.

  Parameters:
    `logTo` - where to send (more or less) interesting output.
    `source` - array of resources bearing relative path and last modification date.
    `mapper` - filename mapper indicating how to find the target files.
    `targets` - object able to map as a resource a relative path at destination.
  Returns:
    array containing the source files which need to be copied or processed, because the targets are out of date or do not exist.

### selectOutOfDateSources

    public static Resource[] selectOutOfDateSources(ProjectComponent logTo,
                                                    Resource[] source,
                                                    FileNameMapper mapper,
                                                    ResourceFactory targets,
                                                    long granularity)

  Tells which source files should be reprocessed based on the last modification date of target files.

  Parameters:
    `logTo` - where to send (more or less) interesting output.
    `source` - array of resources bearing relative path and last modification date.
    `mapper` - filename mapper indicating how to find the target files.
    `targets` - object able to map as a resource a relative path at destination.
    `granularity` - The number of milliseconds leeway to give before deciding a target is out of date.
  Returns:
    array containing the source files which need to be copied or processed, because the targets are out of date or do not exist.
  Since:
    Ant 1.6.2

### selectOutOfDateSources

    public static ResourceCollection selectOutOfDateSources(ProjectComponent logTo,
                                                            ResourceCollection source,
                                                            FileNameMapper mapper,
                                                            ResourceFactory targets,
                                                            long granularity)

  Tells which sources should be reprocessed based on the last modification date of targets.

  Parameters:
    `logTo` - where to send (more or less) interesting output.
    `source` - ResourceCollection.
    `mapper` - filename mapper indicating how to find the target Resources.
    `targets` - object able to map a relative path as a Resource.
    `granularity` - The number of milliseconds leeway to give before deciding a target is out of date.
  Returns:
    ResourceCollection.
  Since:
    Ant 1.7

### copyResource

    public static void copyResource(Resource source,
                                    Resource dest)
                             throws java.io.IOException

  Convenience method to copy content from one Resource to another. No filtering is performed.

  Parameters:
    `source` - the Resource to copy from. Must not be `null`.
    `dest` - the Resource to copy to. Must not be `null`.
  Throws:
    `java.io.IOException` - if the copying fails.
  Since:
    Ant 1.7

### copyResource

    public static void copyResource(Resource source,
                                    Resource dest,
                                    Project project)
                             throws java.io.IOException

  Convenience method to copy content from one Resource to another. No filtering is performed.

  Parameters:
    `source` - the Resource to copy from. Must not be `null`.
    `dest` - the Resource to copy to. Must not be `null`.
    `project` - the project instance.
  Throws:
    `java.io.IOException` - if the copying fails.
  Since:
    Ant 1.7

### copyResource

    public static void copyResource(Resource source,
                                    Resource dest,
                                    FilterSetCollection filters,
                                    java.util.Vector filterChains,
                                    boolean overwrite,
                                    boolean preserveLastModified,
                                    java.lang.String inputEncoding,
                                    java.lang.String outputEncoding,
                                    Project project)
                             throws java.io.IOException

  Convenience method to copy content from one Resource to another specifying whether token filtering must be used, whether filter chains must be used, whether newer destination files may be overwritten and whether the last modified time of `dest` file should be made equal to the last modified time of `source`.

  Parameters:
    `source` - the Resource to copy from. Must not be `null`.
    `dest` - the Resource to copy to. Must not be `null`.
    `filters` - the collection of filters to apply to this copy.
    `filterChains` - filterChains to apply during the copy.
    `overwrite` - Whether or not the destination Resource should be overwritten if it already exists.
    `preserveLastModified` - Whether or not the last modified time of the destination Resource should be set to that of the source.
    `inputEncoding` - the encoding used to read the files.
    `outputEncoding` - the encoding used to write the files.
    `project` - the project instance.
  Throws:
    `java.io.IOException` - if the copying fails.
  Since:
    Ant 1.7

### setLastModified

    public static void setLastModified(Touchable t,
                                       long time)

  Set the last modified time of an object implementing org.apache.tools.ant.types.resources.Touchable .

  Parameters:
    `t` - the Touchable whose modified time is to be set.
    `time` - the time to which the last modified time is to be set. if this is -1, the current time is used.
  Since:
    Ant 1.7

### contentEquals

    public static boolean contentEquals(Resource r1,
                                        Resource r2,
                                        boolean text)
                                 throws java.io.IOException

  Compares the contents of two Resources.

  Parameters:
    `r1` - the Resource whose content is to be compared.
    `r2` - the other Resource whose content is to be compared.
    `text` - true if the content is to be treated as text and differences in kind of line break are to be ignored.
  Returns:
    true if the content of the Resources is the same.
  Throws:
    `java.io.IOException` - if the Resources cannot be read.
  Since:
    Ant 1.7

### compareContent

    public static int compareContent(Resource r1,
                                     Resource r2,
                                     boolean text)
                              throws java.io.IOException

  Compare the content of two Resources. A nonexistent Resource's content is "less than" that of an existing Resource; a directory-type Resource's content is "less than" that of a file-type Resource.

  Parameters:
    `r1` - the Resource whose content is to be compared.
    `r2` - the other Resource whose content is to be compared.
    `text` - true if the content is to be treated as text and differences in kind of line break are to be ignored.
  Returns:
    a negative integer, zero, or a positive integer as the first argument is less than, equal to, or greater than the second.
  Throws:
    `java.io.IOException` - if the Resources cannot be read.
  Since:
    Ant 1.7

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