## 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, 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
`JavaConstantResource()`

Method Summary
`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, isExists, setClasspath, setClasspathRef, setLoaderRef, setParentFirst, setRefid`

Methods inherited from class org.apache.tools.ant.types.Resource
`as, 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, 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`

Constructor Detail

### JavaConstantResource

    public JavaConstantResource()

Method Detail

### 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.