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package org.apache.commons.contract.constraints; |
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import java.math.BigDecimal; |
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import java.util.ArrayList; |
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import java.util.Arrays; |
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import java.util.Iterator; |
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import java.util.List; |
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import org.apache.commons.contract.Context; |
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import org.apache.commons.i18n.bundles.ErrorBundle; |
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import org.apache.commons.i18n.bundles.TextBundle; |
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public class NumberConstraints implements Constraints { |
| 14 | 0 | public final static NumberConstraints UNCONSTRAINED = new NumberConstraints(); |
| 15 | 0 | public final static NumberConstraints POSITIVE = new NumberConstraints(new Integer(0), null, false); |
| 16 | 0 | public final static NumberConstraints NEGATIVE = new NumberConstraints(null, new Integer(0), false); |
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protected boolean constrained, inclusive; |
| 19 | 0 | protected List allowedValues = new ArrayList(); |
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protected Number minimum, maximum; |
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|
| 22 | 0 | public NumberConstraints() { |
| 23 | 0 | this.constrained = false; |
| 24 | 0 | } |
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public NumberConstraints(Number minimum, Number maximum) { |
| 27 | 0 | this(minimum, maximum, true); |
| 28 | 0 | } |
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| 30 | 0 | public NumberConstraints(Number minimum, Number maximum, boolean inclusive) { |
| 31 | 0 | constrained = true; |
| 32 | 0 | this.minimum = minimum; |
| 33 | 0 | this.maximum = maximum; |
| 34 | 0 | this.inclusive = inclusive; |
| 35 | 0 | } |
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|
| 37 | 0 | public NumberConstraints(Number[] allowedValues) { |
| 38 | 0 | this.constrained = true; |
| 39 | 0 | this.allowedValues = new ArrayList(Arrays.asList(allowedValues)); |
| 40 | 0 | } |
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public boolean isConstrained() { |
| 43 | 0 | return constrained; |
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} |
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public void addAllowedValue(Number value) { |
| 47 | 0 | allowedValues.add(value); |
| 48 | 0 | } |
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public Number[] getAllowedValues() { |
| 51 | 0 | if ( allowedValues.isEmpty() ) return null; |
| 52 | 0 | return (Number [])allowedValues.toArray(new Number[0]); |
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} |
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public void setMinimum(Number minimum) { |
| 56 | 0 | constrained = true; |
| 57 | 0 | this.minimum = minimum; |
| 58 | 0 | } |
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public Number getMinimum() { |
| 61 | 0 | return minimum; |
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} |
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public void setMaximum(Number maximum) { |
| 65 | 0 | constrained = true; |
| 66 | 0 | this.maximum = maximum; |
| 67 | 0 | } |
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public Number getMaximum() { |
| 70 | 0 | return maximum; |
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} |
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public Object cast(Object value, Context context) throws CastException { |
| 74 | 0 | if ( value instanceof Number) { |
| 75 | 0 | return (Number)value; |
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} else { |
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try { |
| 78 | 0 | return new BigDecimal(StringConstraints.UNCONSTRAINED.cast(value, null).toString()); |
| 79 | 0 | } catch ( NumberFormatException exception ) { |
| 80 | 0 | throw new CastException(new ErrorBundle("uncastableNumber", new Object[] { value }), exception); |
| 81 | 0 | } catch ( CastException exception ) { |
| 82 | 0 | throw new CastException(new ErrorBundle("uncastableNumber", new Object[] { value }), exception); |
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} |
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} |
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} |
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public void validate(Object value, Context context) throws ValidationException { |
| 88 | 0 | if ( constrained ) { |
| 89 | 0 | Number number = (Number)value; |
| 90 | 0 | if ( getAllowedValues() != null ) { |
| 91 | 0 | for ( Iterator i = allowedValues.iterator(); i.hasNext(); ) { |
| 92 | 0 | Number allowedNumber = (Number)i.next(); |
| 93 | 0 | if ( allowedNumber.equals(number) ) { |
| 94 | 0 | return; |
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} |
| 96 | 0 | } |
| 97 | 0 | throw new ValidationException(new ErrorBundle("invalidNumber", new Object[] { value })); |
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} else { |
| 99 | 0 | if ( inclusive && minimum != null && minimum.doubleValue() > number.doubleValue() ) { |
| 100 | 0 | throw new ValidationException(new ErrorBundle("numberMustBeGreater", new Object[] { number, minimum })); |
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} |
| 102 | 0 | if ( !inclusive && minimum != null && minimum.doubleValue() >= number.doubleValue() ) { |
| 103 | 0 | throw new ValidationException(new ErrorBundle("numberMustBeGreaterOrEqual", new Object[] { number, minimum })); |
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} |
| 105 | 0 | if ( inclusive && maximum != null && maximum.doubleValue() < number.doubleValue() ) { |
| 106 | 0 | throw new ValidationException(new ErrorBundle("numberMustBeLess", new Object[] { number, minimum })); |
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} |
| 108 | 0 | if ( !inclusive && maximum != null && maximum.doubleValue() >= number.doubleValue() ) { |
| 109 | 0 | throw new ValidationException(new ErrorBundle("numberMustBeLessOrEqual", new Object[] { number, minimum })); |
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} |
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} |
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} |
| 113 | 0 | } |
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|
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public TextBundle verboseConstraints() { |
| 116 | 0 | if ( constrained ) { |
| 117 | 0 | if ( inclusive && maximum != null && minimum == null ) { |
| 118 | 0 | return new TextBundle("lessOrEqual", new Object[] { maximum } ); |
| 119 | 0 | } else if ( !inclusive && maximum != null && minimum == null ) { |
| 120 | 0 | return new TextBundle("less", new Object[] { maximum } ); |
| 121 | 0 | } else if ( inclusive && minimum != null && maximum == null ) { |
| 122 | 0 | return new TextBundle("greaterOrEqual", new Object[] { minimum } ); |
| 123 | 0 | } else if ( !inclusive && minimum != null && maximum == null ) { |
| 124 | 0 | return new TextBundle("greater", new Object[] { minimum } ); |
| 125 | 0 | } else if ( inclusive && maximum != null && minimum != null ) { |
| 126 | 0 | return new TextBundle("rangeIncluding", new Object[] { minimum, maximum } ); |
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} else { |
| 128 | 0 | return new TextBundle("rangeExcluding", new Object[] { minimum, maximum } ); |
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} |
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} else { |
| 131 | 0 | return new TextBundle("numbers"); |
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} |
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} |
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} |