Package org.apache.tools.ant.types.resources

# Class JavaConstantResource

java.lang.Object
org.apache.tools.ant.ProjectComponent
org.apache.tools.ant.types.DataType
org.apache.tools.ant.types.Resource
org.apache.tools.ant.types.resources.AbstractClasspathResource
org.apache.tools.ant.types.resources.JavaConstantResource

All Implemented Interfaces:
  `java.lang.Cloneable`, `java.lang.Comparable<Resource>`, `java.lang.Iterable<Resource>`, `ResourceCollection`

    public class JavaConstantResource
    extends AbstractClasspathResource

A resource that is a java constant. This lets you extract values off the classpath and use them elsewhere

Since:
  Ant 1.7

- ## Nested Class Summary

  ## Nested classes/interfaces inherited from class org.apache.tools.ant.types.resources.AbstractClasspathResource

  `AbstractClasspathResource.ClassLoaderWithFlag`

- ## Field Summary

  ### Fields inherited from class org.apache.tools.ant.types.Resource

  `MAGIC, UNKNOWN_DATETIME, UNKNOWN_SIZE`

  ### Fields inherited from class org.apache.tools.ant.types.DataType

  `checked, ref`

  ### Fields inherited from class org.apache.tools.ant.ProjectComponent

  `description, location, project`

- ## Constructor Summary

  Constructors
  Constructor | Description
  --- | ---
  `JavaConstantResource()` |

- ## Method Summary

  Modifier and Type | Method | Description
  --- | --- | ---
  `protected java.io.InputStream` | `openInputStream​(java.lang.ClassLoader cl)` | open the input stream from a specific classloader

  ### Methods inherited from class org.apache.tools.ant.types.resources.AbstractClasspathResource

  `createClasspath, dieOnCircularReference, getClassLoader, getClasspath, getInputStream, getLoader, getRef, isExists, setClasspath, setClasspathRef, setLoaderRef, setParentFirst, setRefid`

  ### Methods inherited from class org.apache.tools.ant.types.Resource

  `as, asOptional, clone, compareTo, equals, getLastModified, getMagicNumber, getName, getOutputStream, getSize, hashCode, isDirectory, isFilesystemOnly, iterator, setDirectory, setExists, setLastModified, setName, setSize, size, toLongString, toString`

  ### Methods inherited from class org.apache.tools.ant.types.DataType

  `checkAttributesAllowed, checkChildrenAllowed, circularReference, dieOnCircularReference, dieOnCircularReference, getCheckedRef, getCheckedRef, getCheckedRef, getCheckedRef, getCheckedRef, getDataTypeName, getRefid, invokeCircularReferenceCheck, isChecked, isReference, noChildrenAllowed, pushAndInvokeCircularReferenceCheck, setChecked, tooManyAttributes`

  ### Methods inherited from class org.apache.tools.ant.ProjectComponent

  `getDescription, getLocation, getProject, log, log, setDescription, setLocation, setProject`

  ### Methods inherited from class java.lang.Object

  `finalize, getClass, notify, notifyAll, wait, wait, wait`

  ### Methods inherited from interface java.lang.Iterable

  `forEach, spliterator`

  ### Methods inherited from interface org.apache.tools.ant.types.ResourceCollection

  `isEmpty, stream`

- ## Constructor Details

  - ### JavaConstantResource

    public JavaConstantResource()

- ## Method Details

  - ### openInputStream

    protected java.io.InputStream openInputStream​(java.lang.ClassLoader cl) throws java.io.IOException
    open the input stream from a specific classloader
    Specified by:
      `openInputStream` in class `AbstractClasspathResource`
    Parameters:
      `cl` - the classloader to use. Will be null if the system classloader is used
    Returns:
      an open input stream for the resource
    Throws:
      `java.io.IOException` - if an error occurs.