X-Git-Url: http://wamblee.org/gitweb/?a=blobdiff_plain;f=system%2Fgeneral%2Fsrc%2Fmain%2Fjava%2Forg%2Fwamblee%2Fsystem%2Fadapters%2FConstructorConfiguration.java;h=d5256cc88315a7757249291b87c2a06cbaee2720;hb=ddd261f331280640c5b53c7128230b629ebcd268;hp=9050b9557fcb4a5428a836f98a227b6fb2e56e3c;hpb=92e23e5ecf9614f2ab770a8cdedc0b21ddf1e127;p=utils

diff --git a/system/general/src/main/java/org/wamblee/system/adapters/ConstructorConfiguration.java b/system/general/src/main/java/org/wamblee/system/adapters/ConstructorConfiguration.java
index 9050b955..d5256cc8 100644
--- a/system/general/src/main/java/org/wamblee/system/adapters/ConstructorConfiguration.java
+++ b/system/general/src/main/java/org/wamblee/system/adapters/ConstructorConfiguration.java
@@ -1,179 +1,218 @@
 /*
  * Copyright 2008 the original author or authors.
- * 
+ *
  * 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.
- */ 
+ */
 package org.wamblee.system.adapters;
 
+import org.wamblee.collections.CollectionFilter;
+
+import org.wamblee.conditions.Condition;
+
+import org.wamblee.system.core.RequiredInterface;
+import org.wamblee.system.core.Scope;
+import org.wamblee.system.core.SystemAssemblyException;
+
 import java.lang.reflect.Constructor;
 import java.lang.reflect.Modifier;
+
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
 
-import org.wamblee.collections.CollectionFilter;
-import org.wamblee.conditions.Condition;
-import org.wamblee.system.core.RequiredInterface;
-import org.wamblee.system.core.Scope;
-import org.wamblee.system.core.SystemAssemblyException;
 
 /**
- * Class that allows configuration of the constructor to use. 
- * 
- * In particular, it provides:
- * <ul>
- *   <li> Selection of a constructor using explicit selection 
- *      {@link #select(Class...)} or using the most greedy constructor 
- *      {@link #greedy()}.
- *   </li>
- *   <li>
- *      Selection of methods to invoke to inject other objects into the object.  
- *   </li>
- *   <li> Selection of fields to set. 
- *   </li>
- * </ul>
+ * Class that allows configuration of the constructor to use.   In
+ * particular, it provides:
+ *  <ul>
+ *      <li>Selection of a constructor using explicit selection  {@link
+ *      #select(Class...)} or using the most greedy constructor  {@link
+ *      #greedy()}.</li>
+ *      <li>Selection of methods to invoke to inject other objects into
+ *      the object.</li>
+ *      <li>Selection of fields to set.</li>
+ *  </ul>
  */
 public class ConstructorConfiguration {
-	private Class clazz; 
-	private Constructor<?> constructor;
-	private ParameterValues values;
-	private boolean publicOnly; 
-
-	/**
-	 * Constructs the configuration. By default the public constructor with the 
-	 * most arguments will be used.   
-	 * @param aClass Class to construct. 
-	 */
-	public ConstructorConfiguration(Class aClass) {
-		clazz = aClass; 
-		constructor = null;  
-		publicOnly = true; 
-	}
-	
-	/**
-	 * Sets whether or no non public constructors are also considered.
-	 * Reset the choice of a constructor to its default.  
-	 * @param aNonPublic
-	 * @return
-	 */
-	public ConstructorConfiguration setNonPublic(boolean aNonPublic) { 
-		publicOnly = !aNonPublic;
-		constructor = null;
-		values = null;
-		return this; 
-	}
-	
-	/**
-	 * Selects an explicit constructor.
-	 * @param aTypes Arguments of the constructor.
-	 * @return Return the injector to allow call chaining. 
-	 */
-	public ConstructorConfiguration select(Class... aTypes) {
-		try {
-			constructor = clazz.getDeclaredConstructor(aTypes); 
-		} catch (Exception e) {
-			throw new SystemAssemblyException(e.getMessage(), e);
-		}
-		resetValues(); 
-		return this; 
-	}
-	
-	/**
-	 * Selects the greediest constructor. 
-	 * @return The injector to allow call chaining.
-	 * @throws SystemAssemblyException if the greediest constructor cannot be uniquely 
-	 *    identified.  
-	 */
-	public ConstructorConfiguration greedy() { 
-		Constructor<?>[] declared = clazz.getDeclaredConstructors();
-		if (declared.length == 0) {
-			throw new SystemAssemblyException("Class '" + clazz
-					+ " is an interface, primitive type, or array");
-		}
-		int max = -1;
-		List<Constructor<?>> checked = new ArrayList<Constructor<?>>();
-		CollectionFilter.filter(Arrays.asList(declared), checked, 
-			new Condition<Constructor<?>>() { 
-			@Override
-			public boolean matches(Constructor<?> aObject) {
-				if ( !publicOnly ) { 
-					return true; 
-				} else { 
-					return Modifier.isPublic(aObject.getModifiers());
-				}
-			}
-		});
-		for (Constructor ctor : checked) {
-			if (ctor.getParameterTypes().length > max) {
-				max = ctor.getParameterTypes().length;
-			}
-		}
-		final int max2 = max;
-		List<Constructor<?>> ctors = checked;
-		List<Constructor<?>> longest = new ArrayList<Constructor<?>>();
-		CollectionFilter.filter(ctors, longest,
-				new Condition<Constructor<?>>() {
-					@Override
-					public boolean matches(Constructor<?> aObject) {
-						return aObject.getParameterTypes().length == max2;
-					}
-				});
-		if (longest.size() > 1) {
-			throw new SystemAssemblyException(
-					"Greediest constructor cannot be uniquely determined");
-		}
-	    constructor = longest.get(0);
-	    resetValues();
-	    return this; 
-	}
-	
-	public ParameterValues getParameters() {
-		getConstructor(); // initialize constructor if needed.
-		return values; 
-	}
-
-	/**
-	 * Resets the values. 
-	 */
-	private void resetValues() {
-		constructor.setAccessible(true);
-		values = new ParameterValues(constructor.getParameterTypes()); 	
-	}
-
-	/**
-	 * Creates the object in the given scope. 
-	 * @param aScope Scope containing required interfaces for this object. 
-	 * @return object. 
-	 */
-	public Object create(Scope aScope) {
-		Object[] valueArray = values.values(aScope);
-		try {
-			return getConstructor().newInstance(valueArray);
-		} catch (Exception e) {
-			throw new SystemAssemblyException("Could not construct object "
-					+ getConstructor() + " " + Arrays.asList(valueArray), e);
-		}
-	}
-	
-	public List<RequiredInterface> getRequiredInterfaces() {
-		getConstructor(); // initialize constructor if needed.
-		return values.getRequiredInterfaces(); 
-	}
-	
-	private Constructor getConstructor() { 
-		if (constructor == null ) { 
-			greedy(); 
-		}
-		return constructor; 
-	}
+    /**
+     * DOCUMENT ME!
+     */
+    private Class clazz;
+
+    /**
+     * DOCUMENT ME!
+     */
+    private Constructor<?> constructor;
+
+    /**
+     * DOCUMENT ME!
+     */
+    private ParameterValues values;
+
+    /**
+     * DOCUMENT ME!
+     */
+    private boolean publicOnly;
+
+/**
+         * Constructs the configuration. By default the public constructor with the 
+         * most arguments will be used.   
+         * @param aClass Class to construct. 
+         */
+    public ConstructorConfiguration(Class aClass) {
+        clazz           = aClass;
+        constructor     = null;
+        publicOnly      = true;
+    }
+
+    /**
+     * Sets whether or no non public constructors are also considered.
+     * Reset the choice of a constructor to its default.
+     *
+     * @param aNonPublic
+     *
+     * @return
+     */
+    public ConstructorConfiguration setNonPublic(boolean aNonPublic) {
+        publicOnly      = !aNonPublic;
+        constructor     = null;
+        values          = null;
+
+        return this;
+    }
+
+    /**
+     * Selects an explicit constructor.
+     *
+     * @return Return the injector to allow call chaining.
+     *
+     * @throws SystemAssemblyException DOCUMENT ME!
+     */
+    public ConstructorConfiguration select(Class... aTypes) {
+        try {
+            constructor = clazz.getDeclaredConstructor(aTypes);
+        } catch (Exception e) {
+            throw new SystemAssemblyException(e.getMessage(), e);
+        }
+
+        resetValues();
+
+        return this;
+    }
+
+    /**
+     * Selects the greediest constructor.
+     *
+     * @return The injector to allow call chaining.
+     *
+     * @throws SystemAssemblyException if the greediest constructor cannot be
+     *         uniquely  identified.
+     */
+    public ConstructorConfiguration greedy() {
+        Constructor<?>[] declared = clazz.getDeclaredConstructors();
+
+        if (declared.length == 0) {
+            throw new SystemAssemblyException("Class '" + clazz
+                + " is an interface, primitive type, or array");
+        }
+
+        int                  max     = -1;
+        List<Constructor<?>> checked = new ArrayList<Constructor<?>>();
+        CollectionFilter.filter(Arrays.asList(declared), checked,
+            new Condition<Constructor<?>>() {
+                @Override
+                public boolean matches(Constructor<?> aObject) {
+                    if (!publicOnly) {
+                        return true;
+                    } else {
+                        return Modifier.isPublic(aObject.getModifiers());
+                    }
+                }
+            });
+
+        for (Constructor ctor : checked) {
+            if (ctor.getParameterTypes().length > max) {
+                max = ctor.getParameterTypes().length;
+            }
+        }
+
+        final int            max2    = max;
+        List<Constructor<?>> ctors   = checked;
+        List<Constructor<?>> longest = new ArrayList<Constructor<?>>();
+        CollectionFilter.filter(ctors, longest,
+            new Condition<Constructor<?>>() {
+                @Override
+                public boolean matches(Constructor<?> aObject) {
+                    return aObject.getParameterTypes().length == max2;
+                }
+            });
+
+        if (longest.size() > 1) {
+            throw new SystemAssemblyException(
+                "Greediest constructor cannot be uniquely determined");
+        }
+
+        constructor = longest.get(0);
+        resetValues();
+
+        return this;
+    }
+
+    public ParameterValues getParameters() {
+        getConstructor(); // initialize constructor if needed.
+
+        return values;
+    }
+
+    /**
+     * Resets the values.
+     */
+    private void resetValues() {
+        constructor.setAccessible(true);
+        values = new ParameterValues(constructor.getParameterTypes());
+    }
+
+    /**
+     * Creates the object in the given scope.
+     *
+     * @param aScope Scope containing required interfaces for this object.
+     *
+     * @return object.
+     *
+     * @throws SystemAssemblyException DOCUMENT ME!
+     */
+    public Object create(Scope aScope) {
+        Object[] valueArray = values.values(aScope);
+
+        try {
+            return getConstructor().newInstance(valueArray);
+        } catch (Exception e) {
+            throw new SystemAssemblyException("Could not construct object "
+                + getConstructor() + " " + Arrays.asList(valueArray), e);
+        }
+    }
+
+    public List<RequiredInterface> getRequiredInterfaces() {
+        getConstructor(); // initialize constructor if needed.
+
+        return values.getRequiredInterfaces();
+    }
+
+    private Constructor getConstructor() {
+        if (constructor == null) {
+            greedy();
+        }
+
+        return constructor;
+    }
 }