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branch](https://img.shields.io/travis/protobufel/multikeymapjava/master.svg?style=plastic)](https://travis-ci.org/protobufel/multikeymapjava)\n[![codecov](https://codecov.io/gh/protobufel/multikeymapjava/branch/master/graph/badge.svg)](https://codecov.io/gh/protobufel/multikeymapjava)\n[![Maven Central](https://img.shields.io/maven-central/v/com.github.protobufel/multikeymapjava.svg?style=plastic)](https://search.maven.org/#search%7Cga%7C1%7Ca%3A%22multikeymapjava%22)\n\n# MultiKeyMap Java Implementation #\n\nJava 8 implementation of the multi-key map.  It behaves like a regular generic Map with the additional ability of getting its values \nby any combination of partial keys. For example, one can add any value with the complex key {\"Hello\", \"the\", \"wonderful\", \"World!\"} , \nand then query by any sequence of subkeys like {\"wonderful\", \"Hello\"}. In addition, you can query by a mixture of some \nany-position-sub-keys and positional sub-keys, as in the following example: \n\n```java\n    MultiKeyMap\u003cString, Iterable\u003cString\u003e, String\u003e map = MultiKeyMaps.newMultiKeyMap();\n\n    // add a record\n    map.put(Arrays.asList(\"Hello\", \",\", \"the\", \"wonderful\", \"world\"), \"You found me!\");\n\n    // or copy some data from the compatible Map\n    Map\u003cIterable\u003cString\u003e, String\u003e dict = new HashMap\u003c\u003e();\n    dict.put(Arrays.asList(\"okay\", \"I\", \"am\", \"here\"), \"or there!\");\n    dict.put(Arrays.asList(\"okay\", \"I\", \"am\", \"not\", \"here\"), \"for sure!\");\n\n    // adding the data from another Map or MultiKeyMap\n    map.putAll(dict);\n\n    // MultiKeyMap interface extends Map, and also adds get{FullKeys|Values|Entries}ByPartialKey\n    // methods of its own\n    String exactMatch = map.get(Arrays.asList(\"okay\", \"I\", \"am\", \"here\"));\n\n    if (exactMatch != null) {\n      System.out.println(String.format(\n          \"This is a regular Map method, looking for exact full key. Let's see the actual value: %s\",\n          exactMatch));\n    }\n\n    // lets look by partial key anywhere within the full key (any sequence in any order of some\n    // sub-keys of the original full key we're looking for)\n    // should be 1 record with value = 'for sure!'. Let's see the actual one:\n    map.getValuesByPartialKey(Arrays.asList(\"not\", \"I\")).forEach(System.out::println);\n\n    // lets look by partial key, wherein some sub-keys are looked at the particular 0-based\n    // positions ( \u003e= 0), and others anywhere ( \u003c 0)\n    // should be 1 record with value = 'or there!'. Let's see the actual one:\n    map.getValuesByPartialKey(Arrays.asList(\"here\", \"I\", \"am\"), Arrays.asList(3, -1, -1))\n        .forEach(System.out::println);\n\n    map.clear();\n    // Happy using!\n\n```\n\n### For more see the [JavaDoc Documentation](https://protobufel.github.io/multikeymapjava/javadoc/ \"JavaDoc and more\").  \n\nHappy coding,\n\nDavid Tesler\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fprotobufel%2Fmultikeymapjava","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fprotobufel%2Fmultikeymapjava","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fprotobufel%2Fmultikeymapjava/lists"}