Examples of org.apache.tools.ant.ComponentHelper

org.apache.tools.ant.ComponentHelper
Component creation and configuration. The class is based around handing component definitions in an AntTypeTable. The old task/type methods have been kept for backward compatibly. Project will just delegate its calls to this class. A very simple hook mechanism is provided that allows users to plug in custom code. It is also possible to replace the default behavior ( for example in an app embedding ant ) @since Ant1.6


        MyAntTypeDefinition def = new MyAntTypeDefinition(this);
        def.setName(name);
        def.setClass(MacroInstance.class);


        ComponentHelper helper = ComponentHelper.getComponentHelper(
            getProject());


        helper.addDataTypeDefinition(def);
        log("creating macro  " + name, Project.MSG_VERBOSE);
    }

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     * @param typename the name of the type
     * @return true if the typename exists
     */
    protected boolean doesTypeExist(String typename) {


        ComponentHelper helper =
            ComponentHelper.getComponentHelper(getProject());
        String componentName = ProjectHelper.genComponentName(uri, typename);
        AntTypeDefinition def = helper.getDefinition(componentName);
        if (def == null) {
            return false;
        }
        //now verify that the class has an implementation
        boolean found = def.getExposedClass(getProject()) != null;
        if (!found) {
            String text = helper.diagnoseCreationFailure(componentName, "type");
            log(text, Project.MSG_VERBOSE);
        }
        return found;
    }

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            antlibUrl.openConnection().connect();
        } catch (IOException ex) {
            throw new BuildException(
                "Unable to find " + antlibUrl, ex);
        }
        ComponentHelper helper =
            ComponentHelper.getComponentHelper(project);
        helper.enterAntLib(uri);
        URLResource antlibResource = new URLResource(antlibUrl);
        try {
            // Should be safe to parse
            ProjectHelper parser = null;
            Object p =
                project.getReference(ProjectHelper.PROJECTHELPER_REFERENCE);
            if (p instanceof ProjectHelper) {
                parser = (ProjectHelper) p;
                if (!parser.canParseAntlibDescriptor(antlibResource)) {
                    parser = null;
                }
            }
            if (parser == null) {
                ProjectHelperRepository helperRepository =
                    ProjectHelperRepository.getInstance();
                parser = helperRepository.getProjectHelperForAntlib(antlibResource);
            }
            UnknownElement ue =
                parser.parseAntlibDescriptor(project, antlibResource);
            // Check name is "antlib"
            if (!(ue.getTag().equals(TAG))) {
                throw new BuildException(
                    "Unexpected tag " + ue.getTag() + " expecting "
                    + TAG, ue.getLocation());
            }
            Antlib antlib = new Antlib();
            antlib.setProject(project);
            antlib.setLocation(ue.getLocation());
            antlib.setTaskName("antlib");
            antlib.init();
            ue.configure(antlib);
            return antlib;
        } finally {
            helper.exitAntLib();
        }
    }

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        if (name == null) {
            throw new BuildException("Name not specified");
        }
        name = ProjectHelper.genComponentName(getURI(), name);


        ComponentHelper helper = ComponentHelper.getComponentHelper(
            getProject());


        String componentName = ProjectHelper.genComponentName(
            nestedTask.getNamespace(), nestedTask.getTag());


        AntTypeDefinition def = helper.getDefinition(componentName);
        if (def == null) {
            throw new BuildException(
                "Unable to find typedef " + componentName);
        }
        PreSetDefinition newDef = new PreSetDefinition(def, nestedTask);


        newDef.setName(name);


        helper.addDataTypeDefinition(newDef);
        log("defining preset " + name, Project.MSG_VERBOSE);
    }

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        MyAntTypeDefinition def = new MyAntTypeDefinition(this);
        def.setName(name);
        def.setClass(MacroInstance.class);


        ComponentHelper helper = ComponentHelper.getComponentHelper(
            getProject());


        helper.addDataTypeDefinition(def);
        log("creating macro  " + name, Project.MSG_VERBOSE);
    }

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                        throw new BuildException("Name not specified");
                }
                name = ProjectHelper.genComponentName(getURI(), name);
                final UnknownElement task = createTask();
                if (!failOnError) {
                        final ComponentHelper helper = ComponentHelper
                                        .getComponentHelper(getProject());
                        if (helper.getDefinition(name) == null)
                                return;
                }
                log("calling '" + name + "'", Project.MSG_DEBUG);
                task.init();
                try {

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  final MyAntTypeDefinition def = new MyAntTypeDefinition(this);
  def.setName(name);
  def.setClass(FilterMacroInstance.class);


  final ComponentHelper helper = ComponentHelper
    .getComponentHelper(getProject());


  helper.addDataTypeDefinition(def);
  log("creating macro  " + name, Project.MSG_VERBOSE);
    }

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            antlibUrl.openConnection().connect();
        } catch (IOException ex) {
            throw new BuildException(
                "Unable to find " + antlibUrl, ex);
        }
        ComponentHelper helper =
            ComponentHelper.getComponentHelper(project);
        helper.enterAntLib(uri);
        try {
            // Should be safe to parse
            ProjectHelper2 parser = new ProjectHelper2();
            UnknownElement ue =
                parser.parseUnknownElement(project, antlibUrl);
            // Check name is "antlib"
            if (!(ue.getTag().equals(TAG))) {
                throw new BuildException(
                    "Unexpected tag " + ue.getTag() + " expecting "
                    + TAG, ue.getLocation());
            }
            Antlib antlib = new Antlib();
            antlib.setProject(project);
            antlib.setLocation(ue.getLocation());
            antlib.init();
            ue.configure(antlib);
            return antlib;
        } finally {
            helper.exitAntLib();
        }
    }

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            throw new BuildException("Name not specified");
        }


        name = ProjectHelper.genComponentName(getURI(), name);


        ComponentHelper helper = ComponentHelper.getComponentHelper(
            getProject());


        String componentName = ProjectHelper.genComponentName(
            nestedTask.getNamespace(), nestedTask.getTag());


        AntTypeDefinition def = helper.getDefinition(componentName);
        if (def == null) {
            throw new BuildException(
                "Unable to find typedef " + componentName);
        }


        PreSetDefinition newDef = new PreSetDefinition(def, nestedTask);


        newDef.setName(name);


        helper.addDataTypeDefinition(newDef);
    }

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        MyAntTypeDefinition def = new MyAntTypeDefinition(this);
        def.setName(name);
        def.setClass(MacroInstance.class);


        ComponentHelper helper = ComponentHelper.getComponentHelper(
            getProject());


        helper.addDataTypeDefinition(def);
    }

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Related Classes of org.apache.tools.ant.ComponentHelper

FilterMacroDef

org.apache.tools.ant.taskdefs.Antlib

org.apache.tools.ant.taskdefs.condition.TypeFound

org.apache.tools.ant.taskdefs.MacroDef

org.apache.tools.ant.taskdefs.PreSetDef

org.apache.tools.ant.taskdefs.Typedef

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TaskCall

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