Examples of org.apache.commons.lang.builder.EqualsBuilder

org.apache.commons.lang.builder.EqualsBuilder
sun.com/docs/books/effective/index.html">Effective Java , by Joshua Bloch. In particular the rule for comparing doubles, floats, and arrays can be tricky. Also, making sure that equals() and hashCode() are consistent can be difficult.

Two Objects that compare as equals must generate the same hash code, but two Objects with the same hash code do not have to be equal.

All relevant fields should be included in the calculation of equals. Derived fields may be ignored. In particular, any field used in generating a hash code must be used in the equals method, and vice versa.

Typical use for the code is as follows:
```
 public boolean equals(Object obj) { if (obj instanceof MyClass == false) { return false; } if (this == obj) { return true; } MyClass rhs = (MyClass) obj; return new EqualsBuilder() .appendSuper(super.equals(obj)) .append(field1, rhs.field1) .append(field2, rhs.field2) .append(field3, rhs.field3) .isEquals(); } 
```
Alternatively, there is a method that uses reflection to determine the fields to test. Because these fields are usually private, the method, reflectionEquals, uses AccessibleObject.setAccessible to change the visibility of the fields. This will fail under a security manager, unless the appropriate permissions are set up correctly. It is also slower than testing explicitly.

A typical invocation for this method would look like:
```
 public boolean equals(Object obj) { return EqualsBuilder.reflectionEquals(this, obj); } 
```
@author Steve Downey @author Stephen Colebourne @author Gary Gregory @author Pete Gieser @author Arun Mammen Thomas @since 1.0 @version $Id: EqualsBuilder.java 161243 2005-04-14 04:30:28Z ggregory $

            return false;
        } else if (!obj.getClass().equals(this.getClass())) {
            return false;
        } else {
            NotificationImpl other = (NotificationImpl) obj;
            EqualsBuilder builder = new EqualsBuilder().append(this.getAllMessages(), other.getAllMessages());
            return builder.isEquals();
        }
    }

View Full Code Here

        if (! (obj instanceof CompositeSpecificationImpl)) {
            return false;
        }
        else {
            CompositeSpecificationImpl otherSpec = (CompositeSpecificationImpl) obj;
            EqualsBuilder builder = new EqualsBuilder();
            return builder.append(this.specificationClass, otherSpec.specificationClass)
                                  .append(this.specificationMethod, otherSpec.specificationMethod)
                                  .isEquals();
        }
    }

View Full Code Here

    public boolean equals(Object obj) {
        if (obj == null || !(obj instanceof IOffice)) return false;
        
        IOffice other = (IOffice) obj;
        
        return new EqualsBuilder().append(this.getOfficeId(), other.getOfficeId()).isEquals();
    }

View Full Code Here

    public boolean equals(Object obj) {
        if (obj == null || !(obj instanceof IEmployee)) return false;
        
        IEmployee other = (IEmployee) obj;
        
        return new EqualsBuilder().append(this.getMatriculationCode(), other.getMatriculationCode()).isEquals();
    }

View Full Code Here

            return false;
        }
        
        Message other = (Message) obj;
        
        return new EqualsBuilder().append(this.getCode(), other.getCode())
        .append(this.getType(), other.getType())
        .isEquals();
    }

View Full Code Here

    public boolean equals(Object obj) {
        if (obj == null || !(obj instanceof IOffice)) return false;
        
        IOffice other = (IOffice) obj;
        
        return new EqualsBuilder().append(this.getOfficeId(), other.getOfficeId()).isEquals();
    }

View Full Code Here

    public boolean equals(Object obj) {
        if (obj == null || !(obj instanceof IEmployee)) return false;
        
        IEmployee other = (IEmployee) obj;
        
        return new EqualsBuilder().append(this.getMatriculationCode(), other.getMatriculationCode()).isEquals();
    }

View Full Code Here

    public boolean equals(Object obj) {
        if (obj == null || !(obj instanceof IOffice)) return false;
        
        IOffice other = (IOffice) obj;
        
        return new EqualsBuilder().append(this.getOfficeId(), other.getOfficeId()).isEquals();
    }

View Full Code Here

    public boolean equals(Object obj) {
        if (obj == null || !(obj instanceof IEmployee)) return false;
        
        IEmployee other = (IEmployee) obj;
        
        return new EqualsBuilder().append(this.getMatriculationCode(), other.getMatriculationCode()).isEquals();
    }

View Full Code Here

    public final boolean equals(final Object other) {
        if (!(other instanceof ApplicationUser)){
            return false;
        }
        ApplicationUser castOther = (ApplicationUser) other;
        return new EqualsBuilder().append(userName, castOther.userName)
                .isEquals();
    }

View Full Code Here

0 1 2 3 4 5 6 7 8 9

TOP

Related Classes of org.apache.commons.lang.builder.EqualsBuilder

ch.hortis.sonar.model.FileSource

ch.hortis.sonar.service.MeasureKey

com.betfair.baseline.v2.to.BodyParamByteObject

com.betfair.baseline.v2.to.BodyParamDateTimeListObject

com.betfair.baseline.v2.to.BodyParamEnumObject

com.betfair.baseline.v2.to.BodyParamFloatObject

com.betfair.baseline.v2.to.BodyParamMapDateTimeKeyObject

com.betfair.baseline.v2.to.BodyParamSimpleMapObject

com.betfair.baseline.v2.to.BodyParamSimpleSetObject

com.betfair.baseline.v2.to.DateTimeListOperationResponseObject

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.