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/*
* ============LICENSE_START=======================================================
* ONAP
* ================================================================================
* Copyright (C) 2018 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* ============LICENSE_END=========================================================
*/
package org.onap.policy.drools.pooling.extractor;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNull;
import java.util.Map;
import java.util.Properties;
import java.util.TreeMap;
import java.util.function.Function;
import org.junit.Before;
import org.junit.Test;
public class ClassExtractorsTest {
private static final int NTIMES = 5;
private static final String MY_TYPE = "theType";
private static final String PROP_PREFIX = "extractor." + MY_TYPE + ".";
private static final String VALUE = "a value";
private static final Integer INT_VALUE = 10;
private static final Integer INT_VALUE2 = 20;
private Properties props;
private ClassExtractors map;
@Before
public void setUp() {
props = new Properties();
props.setProperty(PROP_PREFIX + Simple.class.getName(), "${intValue}");
props.setProperty(PROP_PREFIX + WithString.class.getName(), "${strValue}");
map = new ClassExtractors(props, PROP_PREFIX, MY_TYPE);
}
@Test
public void testExtract() {
Simple obj = new Simple();
assertEquals(INT_VALUE, map.extract(obj));
// string value
assertEquals(VALUE, tryIt(Simple.class, "${strValue}", xxx -> new Simple()));
// null object
assertNull(map.extract(null));
// values from two different kinds of objects
props = new Properties();
props.setProperty(PROP_PREFIX + Simple.class.getName(), "${intValue}");
props.setProperty(PROP_PREFIX + WithString.class.getName(), "${strValue}");
map = new ClassExtractors(props, PROP_PREFIX, MY_TYPE);
assertEquals(INT_VALUE, map.extract(new Simple()));
assertEquals(VALUE, map.extract(new Sub()));
// values from a superclass method, but property defined for subclass
props = new Properties();
props.setProperty(PROP_PREFIX + Sub.class.getName(), "${strValue}");
map = new ClassExtractors(props, PROP_PREFIX, MY_TYPE);
assertEquals(VALUE, map.extract(new Sub()));
// values from a superclass field, but property defined for subclass
props = new Properties();
props.setProperty(PROP_PREFIX + Sub.class.getName(), "${intValue}");
map = new ClassExtractors(props, PROP_PREFIX, MY_TYPE);
assertEquals(INT_VALUE, map.extract(new Sub()));
// prefix includes trailing "."
props = new Properties();
props.setProperty(PROP_PREFIX + Simple.class.getName(), "${intValue}");
map = new ClassExtractors(props, PROP_PREFIX.substring(0, PROP_PREFIX.length() - 1), MY_TYPE);
assertEquals(INT_VALUE, map.extract(new Simple()));
// values from an class in a different file
props = new Properties();
props.setProperty(PROP_PREFIX + ClassExtractorsTestSupport.class.getName(), "${nested.theValue}");
map = new ClassExtractors(props, PROP_PREFIX, MY_TYPE);
assertEquals(ClassExtractorsTestSupport2.NESTED_VALUE, map.extract(new ClassExtractorsTestSupport()));
}
@Test
public void testGetExtractor() {
Simple obj = new Simple();
// repeat - shouldn't re-create the extractor
for (int x = 0; x < NTIMES; ++x) {
assertEquals("x=" + x, INT_VALUE, map.extract(obj));
assertEquals("x=" + x, 1, map.size());
}
}
@Test
public void testBuildExtractorClass_TopLevel() {
// extractor defined for top-level class
props = new Properties();
props.setProperty(PROP_PREFIX + Sub.class.getName(), "${strValue}");
map = new ClassExtractors(props, PROP_PREFIX, MY_TYPE);
assertEquals(VALUE, map.extract(new Sub()));
// one extractor for top-level class
assertEquals(1, map.size());
}
@Test
public void testBuildExtractorClass_SuperClass() {
// extractor defined for superclass (interface)
assertEquals(VALUE, map.extract(new Sub()));
// one extractor for top-level class and one for interface
assertEquals(2, map.size());
}
@Test
public void testBuildExtractorClass_NotDefined() {
// no extractor defined for "this" class
assertNull(map.extract(this));
// one NULL extractor for top-level class
assertEquals(1, map.size());
}
@Test
public void testBuildExtractorClassString() {
// no leading "${"
assertNull(tryIt(Simple.class, "intValue}", xxx -> new Simple()));
// no trailing "}"
assertNull(tryIt(Simple.class, "${intValue", xxx -> new Simple()));
// leading "."
assertNull(tryIt(Sub.class, "${.simple.strValue}", xxx -> new Sub()));
// trailing "."
assertNull(tryIt(Sub.class, "${simple.strValue.}", xxx -> new Sub()));
// one component
assertEquals(VALUE, tryIt(Sub.class, "${strValue}", xxx -> new Sub()));
// two components
assertEquals(VALUE, tryIt(Sub.class, "${simple.strValue}", xxx -> new Sub()));
// invalid component
assertNull(tryIt(Sub.class, "${unknown}", xxx -> new Sub()));
}
@Test
public void testGetClassExtractor_InSuper() {
// field in the superclass
assertEquals(INT_VALUE, tryIt(Super.class, "${intValue}", xxx -> new Sub()));
}
@Test
public void testGetClassExtractor_InInterface() {
// defined in the interface
assertEquals(VALUE, map.extract(new Sub()));
}
@Test
public void testNullExtractorExtract() {
// empty properties - should only create NullExtractor
map = new ClassExtractors(new Properties(), PROP_PREFIX, MY_TYPE);
Simple obj = new Simple();
// repeat - shouldn't re-create the extractor
for (int x = 0; x < NTIMES; ++x) {
assertNull("x=" + x, map.extract(obj));
assertEquals("x=" + x, 1, map.size());
}
}
@Test
public void testComponetizedExtractor() {
// one component
assertEquals(VALUE, tryIt(Sub.class, "${strValue}", xxx -> new Sub()));
// three components
assertEquals(VALUE, tryIt(Sub.class, "${cont.data.strValue}", xxx -> new Sub()));
}
@Test
public void testComponetizedExtractorBuildExtractor_Method() {
assertEquals(INT_VALUE, tryIt(Simple.class, "${intValue}", xxx -> new Simple()));
}
@Test
public void testComponetizedExtractorBuildExtractor_Field() {
assertEquals(VALUE, tryIt(Simple.class, "${strValue}", xxx -> new Simple()));
}
@Test
public void testComponetizedExtractorBuildExtractor_Map() {
Map<String, Object> inner = new TreeMap<>();
inner.put("inner1", "abc1");
inner.put("inner2", "abc2");
Map<String, Object> outer = new TreeMap<>();
outer.put("outer1", "def1");
outer.put("outer2", inner);
Simple obj = new Simple();
props.setProperty(PROP_PREFIX + Simple.class.getName(), "${mapValue}");
map = new ClassExtractors(props, PROP_PREFIX, MY_TYPE);
assertEquals(null, map.extract(obj));
obj.mapValue = outer;
props.setProperty(PROP_PREFIX + Simple.class.getName(), "${mapValue.outer2.inner2}");
map = new ClassExtractors(props, PROP_PREFIX, MY_TYPE);
assertEquals("abc2", map.extract(obj));
}
@Test
public void testComponetizedExtractorBuildExtractor_Unknown() {
assertNull(tryIt(Simple.class, "${unknown2}", xxx -> new Simple()));
}
@Test
public void testComponetizedExtractorExtract_MiddleNull() {
// data component is null
assertEquals(null, tryIt(Sub.class, "${cont.data.strValue}", xxx -> {
Sub obj = new Sub();
obj.cont.simpleValue = null;
return obj;
}));
}
@Test
public void testComponetizedExtractorGetMethodExtractor_VoidMethod() {
// tell it to use getVoidValue()
props.setProperty(PROP_PREFIX + Simple.class.getName(), "${voidValue}");
map = new ClassExtractors(props, PROP_PREFIX, MY_TYPE);
Simple obj = new Simple();
assertNull(map.extract(obj));
assertFalse(obj.voidInvoked);
}
@Test
public void testComponetizedExtractorGetMethodExtractor() {
assertEquals(INT_VALUE, map.extract(new Simple()));
}
@Test
public void testComponetizedExtractorGetFieldExtractor() {
// use a field
assertEquals(VALUE, tryIt(Simple.class, "${strValue}", xxx -> new Simple()));
}
@Test
public void testComponetizedExtractorGetMapExtractor() {
Map<String, Object> inner = new TreeMap<>();
inner.put("inner1", "abc1");
inner.put("inner2", "abc2");
Map<String, Object> outer = new TreeMap<>();
outer.put("outer1", "def1");
outer.put("outer2", inner);
Simple obj = new Simple();
obj.mapValue = outer;
props.setProperty(PROP_PREFIX + Simple.class.getName(), "${mapValue.outer2.inner2}");
map = new ClassExtractors(props, PROP_PREFIX, MY_TYPE);
assertEquals("abc2", map.extract(obj));
}
@Test
public void testComponetizedExtractorGetMapExtractor_MapSubclass() {
Map<String, Object> inner = new TreeMap<>();
inner.put("inner1", "abc1");
inner.put("inner2", "abc2");
MapSubclass outer = new MapSubclass();
outer.put("outer1", "def1");
outer.put("outer2", inner);
Simple obj = new Simple();
props.setProperty(PROP_PREFIX + Simple.class.getName(), "${mapValue}");
map = new ClassExtractors(props, PROP_PREFIX, MY_TYPE);
assertEquals(null, map.extract(obj));
obj.mapValue = outer;
props.setProperty(PROP_PREFIX + Simple.class.getName(), "${mapValue.outer2.inner2}");
map = new ClassExtractors(props, PROP_PREFIX, MY_TYPE);
assertEquals("abc2", map.extract(obj));
}
/**
* Sets a property for the given class, makes an object, and then returns
* the value extracted.
*
* @param clazz class whose property is to be set
* @param propval value to which to set the property
* @param makeObj function to create the object whose data is to be
* extracted
* @return the extracted data, or {@code null} if nothing was extracted
*/
private Object tryIt(Class<?> clazz, String propval, Function<Void, Object> makeObj) {
Properties props = new Properties();
props.setProperty(PROP_PREFIX + clazz.getName(), propval);
map = new ClassExtractors(props, PROP_PREFIX, MY_TYPE);
return map.extract(makeObj.apply(null));
}
/**
* A Map subclass, used to verify that getMapExtractor() still handles it.
*/
private static class MapSubclass extends TreeMap<String, Object> {
private static final long serialVersionUID = 1L;
}
/**
* A simple class.
*/
private static class Simple {
/**
* This will not be used because getIntValue() will override it.
*/
@SuppressWarnings("unused")
private int intValue = INT_VALUE2;
/**
* Used to verify retrieval via a field name.
*/
@SuppressWarnings("unused")
private String strValue = VALUE;
/**
* Used to verify retrieval within maps.
*/
@SuppressWarnings("unused")
private Map<String, Object> mapValue = null;
/**
* {@code True} if {@link #getVoidValue()} was invoked, {@code false}
* otherwise.
*/
private boolean voidInvoked = false;
/**
* This function will supercede the value in the "intValue" field.
*
* @return INT_VALUE
*/
@SuppressWarnings("unused")
public Integer getIntValue() {
return INT_VALUE;
}
/**
* Used to verify that void functions are not invoked.
*/
@SuppressWarnings("unused")
public void getVoidValue() {
voidInvoked = true;
}
}
/**
* Used to verify multi-component retrieval.
*/
private static class Container {
private Simple simpleValue = new Simple();
@SuppressWarnings("unused")
public Simple getData() {
return simpleValue;
}
}
/**
* Used to verify extraction when the property refers to an interface.
*/
private static interface WithString {
public String getStrValue();
}
/**
* Used to verify retrieval within a superclass.
*/
private static class Super implements WithString {
@SuppressWarnings("unused")
private int intValue = INT_VALUE;
@Override
public String getStrValue() {
return VALUE;
}
}
/**
* Used to verify retrieval within a subclass.
*/
private static class Sub extends Super {
@SuppressWarnings("unused")
private Simple simple = new Simple();
/**
* Used to verify multi-component retrieval.
*/
private Container cont = new Container();
}
}
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