/*
 * Copyright 2013 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.gradle.api.internal.artifacts.ivyservice.ivyresolve.parser.data;

public class MavenDependencyKey {
    private static final String KEY_SEPARATOR = ":";
    private final String groupId;
    private final String artifactId;
    private final String type;
    private final String classifier;

    public MavenDependencyKey(String groupId, String artifactId, String type, String classifier) {
        this.groupId = groupId;
        this.artifactId = artifactId;
        this.type = type;
        this.classifier = classifier;
    }

    public String getGroupId() {
        return groupId;
    }

    public String getArtifactId() {
        return artifactId;
    }

    public String getType() {
        return type;
    }

    public String getClassifier() {
        return classifier;
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) {
            return true;
        }
        if (o == null || getClass() != o.getClass()) {
            return false;
        }

        MavenDependencyKey that = (MavenDependencyKey) o;
        if (!groupId.equals(that.groupId)) {
            return false;
        }
        if (!artifactId.equals(that.artifactId)) {
            return false;
        }
        if (classifier != null ? !classifier.equals(that.classifier) : that.classifier != null) {
            return false;
        }
        if (type != null ? !type.equals(that.type) : that.type != null) {
            return false;
        }

        return true;
    }

    @Override
    public int hashCode() {
        int result = groupId.hashCode();
        result = 31 * result + artifactId.hashCode();
        result = 31 * result + (type != null ? type.hashCode() : 0);
        result = 31 * result + (classifier != null ? classifier.hashCode() : 0);
        return result;
    }

    @Override
    public String toString() {
        StringBuilder key = new StringBuilder();
        key.append(groupId).append(KEY_SEPARATOR).append(artifactId).append(KEY_SEPARATOR).append(type);

        if(classifier != null) {
            key.append(KEY_SEPARATOR).append(classifier);
        }

        return key.toString();
    }
}

@@ -687,16 +687,56 @@
 .data;%0A%0A
+import com.google.common.base.Objects;%0A%0A
 public c
@@ -1730,28 +1730,38 @@
     
-if (!groupId.equals(
+return Objects.equal(groupId, 
 that
@@ -1769,19 +1769,16 @@
 groupId)
-) %7B
 %0A       
@@ -1786,45 +1786,25 @@
     
-return false;%0A        %7D%0A        if (!
+&& Objects.equal(
 arti
@@ -1809,24 +1809,18 @@
 tifactId
-.equals(
+, 
 that.art
@@ -1827,19 +1827,16 @@
 ifactId)
-) %7B
 %0A       
@@ -1844,89 +1844,25 @@
     
-return false;%0A        %7D%0A        if (classifier != null ? !classifier.equals(that.
+&& Objects.equal(
 clas
@@ -1867,19 +1867,17 @@
 assifier
-) :
+,
  that.cl
@@ -1888,503 +1888,176 @@
 fier
- != null) %7B%0A            return false;%0A        %7D%0A        if (type != null ? !type
+)%0A            && Objects
 .equal
-s
 (t
-hat.type) : that.type != null) %7B%0A            return false;%0A        %7D%0A%0A        return true;%0A    %7D%0A%0A    @Override%0A    public int hashCode() %7B%0A        int result = groupId.hashCode();%0A        result = 31 * result + artifactId.hashCode();%0A        result = 31 * result + (type != null ? type.hashCode() : 0);%0A        result = 31 * result + (classifier != null ? classifier.hashCode() : 0);%0A        return result
+ype, that.type);%0A    %7D%0A%0A    @Override%0A    public int hashCode() %7B%0A        return Objects.hashCode(groupId, artifactId, classifier, type)
 ;%0A  

Clean up by using `Objects.equal()` and `Objects.hashCode()`