-/*******************************************************************************\r
- * Copyright (c) 2007, 2010 Association for Decentralized Information Management\r
- * in Industry THTH ry.\r
- * All rights reserved. This program and the accompanying materials\r
- * are made available under the terms of the Eclipse Public License v1.0\r
- * which accompanies this distribution, and is available at\r
- * http://www.eclipse.org/legal/epl-v10.html\r
- *\r
- * Contributors:\r
- * VTT Technical Research Centre of Finland - initial API and implementation\r
- *******************************************************************************/\r
-package org.simantics.utils.datastructures.collections;\r
-\r
-import java.util.Arrays;\r
-\r
-\r
-public class LightweightList {\r
-\r
- public static final Object EMPTY = new LL0();\r
- \r
- public static Object add(Object list, Object value) {\r
- if(list instanceof LL)\r
- return ((LL)list).add(value);\r
- else\r
- return new LL2(list, value);\r
- }\r
- \r
- public static Object remove(Object list, Object value) {\r
- if(list instanceof LL)\r
- return ((LL)list).remove(value);\r
- else\r
- return value.equals(list) ? EMPTY : list;\r
- }\r
-\r
- public static int size(Object list) {\r
- if(list instanceof LL)\r
- return ((LL)list).size();\r
- else\r
- return 1;\r
- }\r
- \r
- public static boolean isEmpty(Object list) {\r
- return list==EMPTY;\r
- } \r
- \r
- public static Object[] toArray(Object list) {\r
- if(list == null)\r
- return EMPTY_ARRAY;\r
- else if(list instanceof LL)\r
- return ((LL)list).toArray();\r
- else\r
- return new Object[] { list };\r
- }\r
- \r
- public static interface IProcedure {\r
- void exec(Object obj);\r
- }\r
- \r
- public static void forEach(Object list, IProcedure proc) {\r
- if(list == null)\r
- return;\r
- else if(list instanceof LL)\r
- ((LL)list).forEach(proc);\r
- else\r
- proc.exec(list);\r
- }\r
- \r
- private static interface LL {\r
- Object add(Object value);\r
- Object remove(Object value);\r
- int size();\r
- Object[] toArray();\r
- void forEach(IProcedure proc);\r
- }\r
- \r
- static final Object[] EMPTY_ARRAY = new Object[0];\r
- private static class LL0 implements LL { \r
-\r
- @Override\r
- public Object add(Object value) {\r
- return value;\r
- }\r
-\r
- @Override\r
- public Object remove(Object value) {\r
- return this;\r
- }\r
-\r
- @Override\r
- public int size() {\r
- return 0;\r
- }\r
-\r
- @Override\r
- public Object[] toArray() {\r
- return EMPTY_ARRAY;\r
- }\r
-\r
- @Override\r
- public void forEach(IProcedure proc) {\r
- }\r
- \r
- }\r
- \r
- private static class LL2 implements LL {\r
-\r
- Object v0, v1; \r
- \r
- public LL2(Object v0, Object v1) {\r
- this.v0 = v0;\r
- this.v1 = v1;\r
- }\r
-\r
- @Override\r
- public Object add(Object value) {\r
- return new LL3(v0, v1, value);\r
- }\r
-\r
- @Override\r
- public Object remove(Object value) {\r
- if(value.equals(v0))\r
- return v1;\r
- else if(value.equals(v1))\r
- return v0;\r
- else\r
- return this;\r
- }\r
-\r
- @Override\r
- public int size() {\r
- return 2;\r
- }\r
-\r
- @Override\r
- public Object[] toArray() {\r
- return new Object[] { v0, v1 };\r
- }\r
-\r
- @Override\r
- public void forEach(IProcedure proc) {\r
- proc.exec(v0);\r
- proc.exec(v1);\r
- }\r
- \r
- }\r
- \r
- private static class LL3 implements LL {\r
-\r
- Object v0, v1, v2; \r
- \r
- public LL3(Object v0, Object v1, Object v2) {\r
- this.v0 = v0;\r
- this.v1 = v1;\r
- this.v2 = v2;\r
- }\r
-\r
- @Override\r
- public Object add(Object value) {\r
- return new LLN(v0, v1, v2, value);\r
- }\r
-\r
- @Override\r
- public Object remove(Object value) {\r
- if(value.equals(v0))\r
- return new LL2(v1, v2);\r
- else if(value.equals(v1))\r
- return new LL2(v0, v2);\r
- else if(value.equals(v2))\r
- return new LL2(v0, v1);\r
- else\r
- return this;\r
- }\r
-\r
- @Override\r
- public int size() {\r
- return 3;\r
- }\r
- \r
- @Override\r
- public Object[] toArray() {\r
- return new Object[] { v0, v1, v2 };\r
- }\r
- \r
- @Override\r
- public void forEach(IProcedure proc) {\r
- proc.exec(v0);\r
- proc.exec(v1);\r
- proc.exec(v2);\r
- }\r
- }\r
- \r
- private static class LLN implements LL {\r
-\r
- Object[] array;\r
- int size;\r
- \r
- public LLN(Object v0, Object v1, Object v2, Object v3) {\r
- array = new Object[] { v0, v1, v2, v3, null, null };\r
- size = 4;\r
- }\r
-\r
- @Override\r
- public Object add(Object value) {\r
- if(size==array.length)\r
- array = Arrays.copyOf(array, (size*3)/2+1); \r
- array[size++] = value;\r
- return this;\r
- }\r
-\r
- @Override\r
- public Object remove(Object value) {\r
- for(int i=0;i<size;++i) {\r
- if(value.equals(array[i])) {\r
- while(i < size-1) { \r
- array[i] = array[i+1];\r
- ++i;\r
- }\r
- array[--size] = null;\r
- if(size == 3)\r
- return new LL3(array[0], array[1], array[2]);\r
- else\r
- return this;\r
- }\r
- }\r
- return this; \r
- }\r
-\r
- @Override\r
- public int size() {\r
- return size;\r
- }\r
- \r
- @Override\r
- public Object[] toArray() {\r
- return Arrays.copyOf(array, size);\r
- }\r
- \r
- @Override\r
- public void forEach(IProcedure proc) {\r
- for(int i=0;i<size;++i)\r
- proc.exec(array[i]);\r
- }\r
- } \r
- \r
-}\r
+/*******************************************************************************
+ * Copyright (c) 2007, 2010 Association for Decentralized Information Management
+ * in Industry THTH ry.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ * VTT Technical Research Centre of Finland - initial API and implementation
+ *******************************************************************************/
+package org.simantics.utils.datastructures.collections;
+
+import java.util.Arrays;
+
+
+public class LightweightList {
+
+ public static final Object EMPTY = new LL0();
+
+ public static Object add(Object list, Object value) {
+ if(list instanceof LL)
+ return ((LL)list).add(value);
+ else
+ return new LL2(list, value);
+ }
+
+ public static Object remove(Object list, Object value) {
+ if(list instanceof LL)
+ return ((LL)list).remove(value);
+ else
+ return value.equals(list) ? EMPTY : list;
+ }
+
+ public static int size(Object list) {
+ if(list instanceof LL)
+ return ((LL)list).size();
+ else
+ return 1;
+ }
+
+ public static boolean isEmpty(Object list) {
+ return list==EMPTY;
+ }
+
+ public static Object[] toArray(Object list) {
+ if(list == null)
+ return EMPTY_ARRAY;
+ else if(list instanceof LL)
+ return ((LL)list).toArray();
+ else
+ return new Object[] { list };
+ }
+
+ public static interface IProcedure {
+ void exec(Object obj);
+ }
+
+ public static void forEach(Object list, IProcedure proc) {
+ if(list == null)
+ return;
+ else if(list instanceof LL)
+ ((LL)list).forEach(proc);
+ else
+ proc.exec(list);
+ }
+
+ private static interface LL {
+ Object add(Object value);
+ Object remove(Object value);
+ int size();
+ Object[] toArray();
+ void forEach(IProcedure proc);
+ }
+
+ static final Object[] EMPTY_ARRAY = new Object[0];
+ private static class LL0 implements LL {
+
+ @Override
+ public Object add(Object value) {
+ return value;
+ }
+
+ @Override
+ public Object remove(Object value) {
+ return this;
+ }
+
+ @Override
+ public int size() {
+ return 0;
+ }
+
+ @Override
+ public Object[] toArray() {
+ return EMPTY_ARRAY;
+ }
+
+ @Override
+ public void forEach(IProcedure proc) {
+ }
+
+ }
+
+ private static class LL2 implements LL {
+
+ Object v0, v1;
+
+ public LL2(Object v0, Object v1) {
+ this.v0 = v0;
+ this.v1 = v1;
+ }
+
+ @Override
+ public Object add(Object value) {
+ return new LL3(v0, v1, value);
+ }
+
+ @Override
+ public Object remove(Object value) {
+ if(value.equals(v0))
+ return v1;
+ else if(value.equals(v1))
+ return v0;
+ else
+ return this;
+ }
+
+ @Override
+ public int size() {
+ return 2;
+ }
+
+ @Override
+ public Object[] toArray() {
+ return new Object[] { v0, v1 };
+ }
+
+ @Override
+ public void forEach(IProcedure proc) {
+ proc.exec(v0);
+ proc.exec(v1);
+ }
+
+ }
+
+ private static class LL3 implements LL {
+
+ Object v0, v1, v2;
+
+ public LL3(Object v0, Object v1, Object v2) {
+ this.v0 = v0;
+ this.v1 = v1;
+ this.v2 = v2;
+ }
+
+ @Override
+ public Object add(Object value) {
+ return new LLN(v0, v1, v2, value);
+ }
+
+ @Override
+ public Object remove(Object value) {
+ if(value.equals(v0))
+ return new LL2(v1, v2);
+ else if(value.equals(v1))
+ return new LL2(v0, v2);
+ else if(value.equals(v2))
+ return new LL2(v0, v1);
+ else
+ return this;
+ }
+
+ @Override
+ public int size() {
+ return 3;
+ }
+
+ @Override
+ public Object[] toArray() {
+ return new Object[] { v0, v1, v2 };
+ }
+
+ @Override
+ public void forEach(IProcedure proc) {
+ proc.exec(v0);
+ proc.exec(v1);
+ proc.exec(v2);
+ }
+ }
+
+ private static class LLN implements LL {
+
+ Object[] array;
+ int size;
+
+ public LLN(Object v0, Object v1, Object v2, Object v3) {
+ array = new Object[] { v0, v1, v2, v3, null, null };
+ size = 4;
+ }
+
+ @Override
+ public Object add(Object value) {
+ if(size==array.length)
+ array = Arrays.copyOf(array, (size*3)/2+1);
+ array[size++] = value;
+ return this;
+ }
+
+ @Override
+ public Object remove(Object value) {
+ for(int i=0;i<size;++i) {
+ if(value.equals(array[i])) {
+ while(i < size-1) {
+ array[i] = array[i+1];
+ ++i;
+ }
+ array[--size] = null;
+ if(size == 3)
+ return new LL3(array[0], array[1], array[2]);
+ else
+ return this;
+ }
+ }
+ return this;
+ }
+
+ @Override
+ public int size() {
+ return size;
+ }
+
+ @Override
+ public Object[] toArray() {
+ return Arrays.copyOf(array, size);
+ }
+
+ @Override
+ public void forEach(IProcedure proc) {
+ for(int i=0;i<size;++i)
+ proc.exec(array[i]);
+ }
+ }
+
+}
Code Review / simantics / platform.git / blobdiff